umbc columbus center roof replacement technical specifications

7/30/2019 UMBC Columbus Center Roof Replacement Technical Specifications

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ADMINISTRATION & FINANCE

FACILITIES MANAGEMENT

SPECIFICATIONS FOR THE

CONSTRUCTION OFCOLUMBUS CENTER ROOF REPLACEMENT

UNIVERSITY PROJECT # 12-119

BUILDING INVENTORY No.

VOLUME 1: PROJECT SPECIFICATIONS

July 24, 2013________________________________________________________________________

Owner Board of Public Works

University of Maryland Baltimore County

1000 Hilltop Circle

Baltimore, Maryland 22150

Martin OMalley, Governor

Peter Franchot, Comptroller

Nancy K. Kopp, Treasurer

Maryland General AssemblyThomas V. Miller Jr, Senate President

Michael Erin Busch, House Speak

________________________________________________________________________

ArchitectGant Brunnett Architects

15 West Mulberry Street

Baltimore, MD 21201


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Columbus Center Roof Replacement Project No: 12-119

July 24, 2013

PROJECT DIRECTORY 00002 - 1

Columbus Center Roof Replacement

Baltimore, Maryland

Date: July 24, 2013

Team Member Contact

Owner

University of Maryland Baltimore County Michael Yates

Office of Facilities Management Phone:410.385.63551000 Hilltop Circle Facsimile:410.385.6345

Baltimore, Maryland 21250 Email:[email protected]

Architects

Gant Brunnett Architects, Inc. John Brunnett, AIA

15 West Mulberry Street Phone:410.234.8444

Baltimore, Maryland 21201 Facsimile:410.234.2964


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TABLE OF CONTENTS Page 1

TABLE OF CONTENTS

DIVISION 0:

SECTION TITLE

00851 DRAWING INDEX 1

DIVISION 1: GENERAL REQUIREMENTS

SECTION TITLE

01010 SUMMARY OF WORK 2

01027 APPLICATIONS FOR PAYMENT 4

01030 ALTERNATES 2

01035 MODIFICATION PROCEDURES 2

01040 COORDINATION 4

01045 CUTTING AND PATCHING 4

01095 REFERENCE STANDARDS & DEFINITIONS 4

01200 PROJECT MEETINGS 4

01270 UNIT PRICES 2

01300 SUBMITTALS 14

01311 SCHEDULES & REPORTS 7

01380 CONSTRUCTION PHOTOGRAPHS 3

01400 QUALITY CONTROL 4

01600 MATERIALS & EQUIPMENT, DELIVERY, STORAGE & HANDLING 5

01631 SUBSTITUTIONS 2

01700 CONTRACT CLOSEOUT 9

DIVISION 5: METALS

SECTION TITLE

05400 COLD FORMED LIGHT GAGE STRUCTURAL STEEL 2

DIVISION 6: WOODS AND PLASTIC

SECTION TITLE

06100 ROUGH CARPENTRY 5

DIVISION 7: THERMAL AND MOISTURE PROTECTION

SECTION TITLE

07520 ASPHALT ROOFING WITH MODIFIED BITUMEN CAP 13

PHOTOS OF EXISTING COPING 3

07600 FLASHING AND SHEET METAL 4

07900 JOINT SEALERS 6


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DRAWING INDEX 00851 - 1

DOCUMENT 00851

DRAWING INDEX

ARCHITECTURAL DRAWINGS

G001 Cover Sheet

A100 Roof Plan, Legend and Notes

A101 Partial Roof Plan A

A102 Partial Roof Plan B

A103 Partial Roof Plan C

A501 Roof Details

A502 Roof Details

END OF SECTION


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COLD FORMED LIGHT GAGE STRUCTURAL FRAMING 05400 - 1

SECTION 05400 - COLD FORMED LIGHT GAGE STRUCTURAL FRAMING

PART 1 - GENERAL

1.1 DESCRIPTION

A. Structural light gage materials including, but not limited to studs, joists, tracks,

bridging, web stiffeners and accessories required for complete installation.

1.2 REFERENCES

A. AISI "Specifications for Design of Cold Formed Steel Structural Members, latest

edition.

B. ASTM A 446-83.

C. American Welding Society (AWS).

1.3 SUBMITTALS

A. Data:

1. Member properties.

B. Erection and Shop Drawings that include:

1. Details.

2. Member location, sizing and marking and properties.3. Manner of making typical and special connections.

4. Member's location relative to walls, spandrel sections, openings or other

construction features.

PART 2 - PRODUCTS

2.1 MATERIALS AND DESIGN

A. Materials of depth, minimum gage section properties, and capacities illustrated by the

Drawings.

B. 14 and 16 gage members formed from steel meeting requirements of ASTM A 446,

Grade D, minimum yield of 50 KSI.

C. 18 and 20 gage members formed from steel meeting requirements of ASTM A 446,

Grade A, minimum yield of 33 KSI.


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COLD FORMED LIGHT GAGE STRUCTURAL FRAMING 05400 - 2

2.2 FABRICATIONS

A. Members and accessories formed from steel with G-60 galvanized coating.

B. Cut framing components squarely or at angle to fit squarely against abutting members.

C. Hold members firmly in position until properly fastened.

D. Attach similar components by welding in accordance with approved shop drawings.

E. Weld all connections of stud to stud, stud to track and stud to frame. Make all such

connections using 2-1/8" fillet welds 1-1/2" long unless otherwise noted on drawings.

F. All welding done by certified welders in compliance with the requirements of AWS.

G. Provide continuous steel track at top and bottom of all stud walls. Provide minimum 1row horizontal bridging at mid height of all walls unless additional rows are noted on

contract drawings or required by stud manufacturer. Weld bridging to each flange on

each stud. Details to appear on shop drawings.

H. Weld stud flanges to track. Voids not permitted at top or bottom of stud at track

(typical).

PART 3 - EXECUTION

3.1 ERECTION

A. Erect in accordance with approved erection drawings.

B. Touch up welds and damaged finishes with zinc rich primer.

END OF SECTION


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ROUGH CARPENTRY 06100 - 1

SECTION 06100 - ROUGH CARPENTRY

PART 1 - GENERAL

1.1 DESCRIPTION

A. Section includes:

1. Furnishing and installing rough carpentry, including rough hardware.

2. Rough carpentry consists of wood construction both temporary and permanent

that is not exposed to view in completed building. Rough carpentry work

includes proper installation of grounds, wood or metal, nailing strips, blocking,

etc., necessary or required to produce an adequate and substantial base for

support of finishes, material, fittings and equipment.

3. Rough carpentry includes carpentry work not specified as part of other

sections and which is generally not exposed, except as otherwise indicated.

Types of work in this section include rough carpentry for:a. Wood grounds, nailers, blocking and sleepers

1.2 REFERENCES

A. Lumber Standards:

Comply with PS 20 and with applicable rules of the respective grading and

inspecting agencies for species and products indicated.

1. American Wood Preservers Bureau Standards

2. Western Wood Products Association Use Manual

3. American Plywood Association (APA) Design/Construction Guide

B. Plywood Product Standards:

Comply with PS 1 (ANSI A 199.1) or, for products not manufactured under PS 1

provisions, with applicable APA Performance Standard for type of panel indicated.

1.3 SUBMITTALS

A. Material Certificates:

Where dimensional lumber is provided to comply with minimum allowable unit

stresses, submit listing of species and grade selected for each use, and submit

evidence of compliance with specified requirements. Compliance may be in the

form of a signed copy of applicable portion of lumber producer's grading rulesshowing design values for selected species and grade. Design values shall be as

approved by the Board of Review of the American Lumber Standards Committee.

B. Wood Treatment Data:


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1. Submit treatment manufacturer's instructions for proper use of each type of

treated material.

2. Pressure Treatment: For each type specified, include certification by treating

plant stating chemicals and process used, net amount of preservative retained

and conformance with applicable standards.3. Water-Borne Preservatives: For each type include statement that moisture

content of treated materials was reduced to a maximum of 15% prior to

shipment to the project site.

4. Fire Retardant Treatment: Include certification by treating plant that

treatment material complies with governing ordinances and that treatment will

not bleed through finished surfaces.

1.4 PRODUCT HANDLING

A. Protection:

1. Deliver material to job site and store, in safe area, out of way of traffic andshored up off ground surface.

2. Identify framing lumber by grades, and store each grade separately from other

grades.

3. Protect metals with adequate waterproof outer wrapping.

4. Use extreme care in off loading of lumber to prevent damage, splitting, and

breaking of materials.

5. Delivery and Storage: Keep materials dry at all times. Protect against

exposure to weather and contact with damp or wet surfaces. Stack lumber and

plywood, and provide air circulation within stacks. Do not store materials

directly on the ground.

1.5 JOB CONDITIONS

Coordination: Fit carpentry work to other work; scribe and cope as required for accurate

fit. Correlate location of furring, nailers, blocking, grounds and similar supports to allow

proper attachment of other work.

PART 2 - PRODUCTS

2.1 LUMBER: GENERAL

A. Factory-mark each piece of lumber with type, grade, mill and grading agency,

except omit marking from surfaces to be exposed with transparent finish or withoutfinish.

B. Nominal sizes are indicated, except as shown by detail dimensions. Provide actual

sizes as required by PS 20, for moisture content specified for each use.


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C. Provide dressed lumber, S4S, unless otherwise indicated.

D. Provide kiln-dried lumber 15% maximum moisture content at time of dressing.

2.2 BOARDS (less than 2 thick)

A. Concealed Boards:

Where boards will be concealed by other work, provide lumber of 19% maximum

moisture content (S-Dry) and of Southern Pine No. 2.

2.4 MISCELLANEOUS LUMBER

A. Provide Construction Grade light framing size lumber of any species for support or

attachment of other work including cant strips, bucks, nails, blocking, furring,

grounds, stripping and similar members. Provide kiln-dried lumber with 15%

maximum moisture content.

B. Where rough carpentry work is exposed to the weather, in ground contact, or in

area of high relative humidity, provide fasteners and anchorages with a hot-dip zinc

coating (ASTM A 153)

2.5 MISCELLANEOUS MATERIALS

A. Fasteners and Anchorages:

1. Provide size, type, material and finish as indicated and as recommended by

applicable standards, complying with applicable Federal Specifications for

nails, staples, screws, bolts, nuts, washers and anchoring devices. Providemetal hangers and framing anchors of the size and type recommended by the

manufacturer for each use including recommending nails.

2. Where rough carpentry work is exposed to the weather, in ground contact, or

in area of high relative humidity, provide fasteners and anchorages with a hot-

dip zinc coating (ASTM A 153)

B. Rough Hardware

1. Steel Items:

a. Comply with ASTM A7 or ASTM A36.

b. Use galvanized at exterior locations.

2. Machine bolts: Comply with ASTM A307.3. Lag bolts: Comply with Fed Spec FF-B-561.

4. Nails:

a. Use common except as otherwise noted.

b. Comply with Fed Spec FF-N-1.

c. Use galvanized at exterior locations.


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2.6 WOOD TREATMENT

A. Preservative Treatment:

Where lumber or plywood is indicated as "treated", or is specified herein to be

treated, comply with applicable requirements of AWPA Standards C2 and C9 andof AWPB Standards listed below. Mark each treated item with the AWPB Quality

Mark Requirements.

1. Above Ground Lumber:

a. Pressure treat above ground items with water borne preservatives

complying with AWPB LP-2. After treatment, kiln-dry to a maximum

moisture content of 15%. Treat indicated items and the following:

b. Wood cants, nailers, curbs, blocking, stripping, and similar members in

connection with roofing, flashing, vapor barriers and waterproofing.

c. Wood sills, sleepers, blocking, furring, stripping and similar concealed

members in contact with masonry of concrete.

2.7 OTHER MATERIALS

A. Contractor selects other materials, not specifically described but required for a

complete and proper installation, subject to Architects approval.

PART 3 - EXECUTION

3.1 INSTALLATION

A. General:

1. Discard units of material with defects which might impair quality of work,and units which are too small to use in fabricating work with minimum joints

or optimum joint arrangement.

2. Set carpentry work accurately to required levels and lines, with members

plumb and true and accurately cut and fitted.

3. Securely attach carpentry work to substrate by anchoring and fastening as

shown and as required by recognized standards. Countersink nail heads on

exposed carpentry work and fill holes.

4. Use common wire nails, except as otherwise indicated. Use finishing nails for

finish work. Select fasteners of size that will not penetrate members where

opposite side will be exposed to view or will receive finish materials. Make

tight connections between members. Install fasteners without splitting wood;predrill as required.

B. Wood Grounds, Nailers, Blocking, and Sleepers:

1. Provide wherever shown and where required for screeding or attachment of

other work. Form to shapes as shown and cut as required for true line and


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level of work to be attached. Coordinate location with other work involved.

2. Attach to substrates as required to support applied loading. Countersink bolts

and nuts flush with surfaces, unless otherwise show. Build into masonry

during installation of masonry work. Where possible, anchor to formwork

before concrete placement.3. Provide solid wood blocking concealed within stud wall framing for all wall

mounted toilet accessories, wall and ceiling mounted cabinets, and wall

mounted shelving.

4. Provide permanent grounds of dressed, preservative treated, key beveled

lumber not less than 1-1/2" wide and of thickness required to bring face of

ground to exact thickness of finish material involved. Remove temporary

grounds when no longer required.

END OF SECTION


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ASPHALT ROOFING WITH MODIFIED BITUMENT CAP 07520 - 1

SECTION 07520

ASPHALT ROOFING WITH MODIFIED BITUMEN CAP

PART 1 - GENERAL

1.1 DESCRIPTION OF WORK

A. Extent of built up roofing is indicated on the drawings and is hereby defined to

include non- traffic bearing system intended for weather exposure as primary roofing

as follows:

1. Roof Insulation

3. 2-Ply built up Asphalt roofing with SBS Modified Modified Bitumen Cap

Sheet

1.2 QUALITY ASSURANCE

A. Manufacturer:

1. Obtain primary built up roofing materials from a single manufacturer.

Provide secondary materials as recommended by the manufacturer of the

primary materials.

2. Roofing manufacturer shall be an established manufacturer of type roofing

materials specified, maintaining technically qualified personnel, in the project

area, to review proposed construction, consult at the project site, make

detailed recommendations concerning installation procedures, etc.

B. Installer:

1. A firm with not less than 5 years of successful experience in the installation of

roofing systems identical to those required for this project and which is

licensed by the manufacturer of primary roofing materials.

2. Provide written certification from manufacturer of roofing system that

Installer is approved by manufacturer for installation of specified roofing

system. Submit copy of certification to Architect.

3. Installer shall maintain a full time supervisor at the site of the work at all

times when roofing work is in progress. Supervisor shall have a minimum of

5 years experience as a supervisor of roofing work and 3 years with the samecompany.

C. Pre Roofing Conference:

Prior to installation of roofing and associated work, meet at the project site with

installer, roofing manufacturer, installers of related work, and other entities


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concerned with roofing installation and performance, including Architect, and

Owner.

1.3 SUBMITTALS

A. Product Data:Submit specifications, installation instructions and general recommendations from

manufacturers of built up roofing system. Include data substantiating that materials

comply with requirements. List of materials with related specifications and product

literature.

Product data describing insulation materials, including shop drawing of insulation

layout.

B. Warranty:

Provide manufacturers certification that roofing systems specified, existing roof

conditions that impact installation, and all of the particular contract requirements,are acceptable to the manufacturer and will not hinder the issuance by the

manufacturer of the specified warranty.

C. Pull-Out Tests:

Submit a complete listing of pull-out tests conducted and the corresponding pull-out

values, signed by the representative conducting the test and the Roofing Applicator

verifying the accuracy of the test.

D. Certifications:

Provide certification of installer by manufacturer and qualifications of supervisor.

1.4 PRODUCT HANDLING, STORAGE AND DELIVERY

A. Deliver material in manufacturer's original containers with labels intact and legible.

B. Deliver bulk shipments with certification of compliance with specifications

including melting point, flash point, application temperature, etc.

C. Select and operate material handling equipment and store materials to keep from

damaging existing construction or applied roofing.

D. Store rolls of felt, cartons and drums of bitumen, all cans and drums of cement,primers, and coatings on end.

E. Store materials on clean, raised platforms.

1. Store and handle materials to protect them from:

2. Moisture, whether due to rain, snow or condensation

3. Damage by construction traffic


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4. Temperatures over 110 degrees Fahrenheit

5. Temperatures below 40 degrees Fahrenheit

6. Direct sunlight

7. Mud, dust, sand, oil, grease and dirt.

Note: Polyethylene is not acceptable as a cover, use opaque tarpaulins.

F. Damaged materials shall be replaced at the Contractor's expense.

G. Immediately remove and dispose of wet materials.

H. Comply with fire, safety, and environmental protection regulations.

I. Materials, including, but not limited to, insulation, roofing plies, and bitumen shall

not be stored on the roof.

1.5 WEATHER CONDITIONS

A. Weather:

1. Proceed with roofing work when existing and forecasted weather conditions

permit work to be performed in accordance with manufacturer's

recommendations and

warranty requirements.

2. Do not apply roofing when ambient temperature is below 40 degrees F or

when wind speed is over 20 miles per hour.

B. Protection:

1. Take special precautions against traffic damage when ambient temperature isabove 80 degree F. Avoid heavy traffic on the work during all phases of

installation.

2. Replace or restore to original condition any materials or work damaged during

construction.

3. Protect exterior building and paving surface with tarpaulins in the area of the

work during roofing work, including tear-off areas, asphalt pipeline, hoists,

dumpster, dump trucks, etc.

4. Lap protective materials at least 6 inches and secure protective coverings

against wind.

5. Leave protective covering in place until roofing work is completed.

6. Protect the building interior from water infiltration at all times. Do not tearoff more roofing than can be replaced by the end of the work day.

1.6 WARRANTY

A. Manufacturer's Warranty:

1. The manufacturer of the roofing system shall issue the warranty for a thirty

(30) year period with No Dollar Limit on replacement costs. This warranty


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shall insure that the roofing system installed remains watertight for thirty

years after Substantial Completion and that the manufacturer guarantees to

correct/repair all leaking roof systems during the warranty period free of

charge.

2. The cost of the manufacturer's warranty shall be included in the Base Bid ofthe Contract and shall be the sole responsibility of the Contractor to obtain.

3. The work of the Contract will not be considered Substantially Complete until

the manufacturer's warranty is issued and the work is found to be acceptable

to the Owner.

B. Installer's Warranty:

Provide Roofing Contractor's written warranty to repair or replace any component

of the roofing system, including but not limited to, roof membrane, insulation,

flashing, metal coping and metal flashing, for a period of 5 years.

1.7 PERFORMANCE REQUIREMENTSA. General: Install a watertight, modified bituminous membrane roofing and base

flashing system with compatible components that will not permit the passage of

liquid water and will withstand wind loads, thermally induced movement, and

exposure to weather without failure.

B. FM Listing: Provide modified bituminous membrane, base flashings, and

component materials that meet requirements of FM-4450 and FM-4470 as part of a

roofing system and that are listed in FM's "Approval Guide" for Class-1 or

noncombustible construction, as applicable. Identify materials with FM markings.

1. Roofing system shall comply with the following:

a. Fire/Windstorm Classification: Class-1A-60

C. Roofing System Design: Provide a roofing system that complies with roofing

system manufacturer's written design instructions and with the following:

1.8 SYSTEM MOCK-UP

Prior to the submittal of any roofing materials, shop drawings, or any on-site work,

the Contractor shall remove a section of existing metal coping (location to be

determined by the Architect) and construct a full size sample of the roof membrane

termination and coping detail. The mock-up is required to demonstrate the

Contractors ability to execute the construction in a manner that achieves the design

intent.

1.9 SPECIAL CONSIDERATIONS

A. The existing roof construction involves termination of the roof membrane under

existing metal coping units that are custom fabricated to connect with the existing exterior wall

panels as a cohesive system. The contractor shall exercise care and protect the shape and finish


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on these existing coping units as they are removed to facilitate removal of the existing roofing

and installation of the new roofing. Each coping section shall be marked (on the underside) for

identification, and replaced in the same location. Photographs of the predominant coping unit

and provided as the end of the specification section for information purposes.

PART 2 PRODUCTS

2.1 GENERAL

A. Systems shall be provided as specified in approved manufacturer's latest published

manual conforming to detailed requirements of this contract.

B. Materials shall be products from manufacturer or recommended by them, selected

for compatibility and to perform as an integrated construction system.

C. The roofing system shall consist of, but is not limited to, insulation, overlaymentboard, asphalt built up roofing, modified bitumen cap sheet, and modified bitumen

base flashing for the entire project.

2.2 BUILT UP ASPHALT ROOFING AND MODIFIED BITUMEN ROOFING:

A. Manufacturer:

1. Subject to compliance with requirements of the contract, provide products of

one of the following:

a. Tremco

b. GAF

c. Firestone Building Productsd. Flex

e. Johns Manfield

2. Specifications for products and applications have been written using Firestone

Building Products terminology. Equivalent products and installation

processes will be acceptable subject to submittal and approval. The

Contractor is responsible for providing all comparison data for substitute

products.

B. Plys and Membranes:

1. Built Up Roofing Plies: Inorganic fiberglass reinforced ply sheets, "FirestoneSBS Premium Base" meeting ASTM D6163 Type II, Grade S.

2. SBS Cap Sheet: Provide Firestone SBS Modified Bitumen cap sheet

fabricated from styrene-butadiene-styrene rubber modified asphalt reinforced

with a non-woven polyester mat and surfaced with factory applied ceramic

granules manufactured to 160 mil thickness meeting ASTM-D-6164 Type II

Grade G. Finish color shall be ultrawhite.


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C. Auxiliary Membrane Materials

1. General: Furnish auxiliary materials recommended by roofing system

manufacturer for intended use and compatible with SBS-modified bituminous

roofing.a. Furnish liquid-type auxiliary materials that meet VOC limits of

authorities having jurisdiction.

2. Asphalt Primer: ASTM-D-41.

3. Modified Bitumen Cold Adhesive: ASTM D 4479-93 Type I, consisting of an

asphalt matrix blended with fibers and selective adhesive additives.

4. SBS Modified Asphalt Roofing Cement: ASTM-D-4586, SBS modified

asbestos free, of consistency required by roofing system manufacturer for

application.

5. Mastic Sealant: Poly-isobutylene, plain or modified bituminous, non-

hardening, non-migrating, non-skinning, and non-drying.

6. Roofing Granules: Ceramic-coated roofing granules, No.-11 screen size with100 percent passing No.-8 (2.36-mm) sieve and 98 percent of mass retained

on No.-40 (0.425-mm) sieve.

a. Color: UltraWhite.

7. Glass-Fiber Fabric: Woven glass cloth, treated with asphalt; complying with

ASTM-D-1668, Type-I.

8. Liquid Flashing

a. Firestone Ultra Flash Liquid Flashing including primers and reinforcing

mats to make a complete liquid flashing seal as per manufactures

instructions. Apply roofing granules to liquid flashing to maintain the

ultrawhite coating over the entire roofing system.

2.3 ROOF INSULATION

A. General:

Thicknesses shown are for thermal conductivity (k-value at 75 degrees F) specified

for each material. Provide adjusted thicknesses as directed for equivalent use of

material having different thermal conductivity; provide appropriate thickness of

material when thermal resistance ("R" values) are shown.

B. Polyisocyanurate Rigid Board Insulation:

1. Provide Firestone ISO 95+ roofing insulation, ASTM C1289, including facers

of glass fiber mat on both major surfaces, or approved equal as follows:a. Federal Specifications: HH-I-1972/Gen. and HH-I-1972/2 Class 1

b. Insulation Core: Polyisocyanurate

c. Facer: Perforated Glass Fiber Mat

d. Dimensional Stability: Less than 2%

e. Service Temp. -100 to +250 degrees F

f. Density: 2 PCF


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g. Flame Spread: 25 max

h. Compressive Strength 20 psi min

i. Aged Insulation Value R 6.25 @ 1" thickness

2. Provide tapered crickets sloped 1/2" per foot with a minimum thickness of

1/2".

C. Overlay Board:

Where indicated as "Overlay" on the drawings, Firestone ISO Guard HD, 1/2"

thick, or approved equal.

D. Cant Strips and Edge Strips:

Provide tapered cant strips and edge strips of asphalt impregnated wood fiberboard

preformed to 45 degree angle, approved by roofing manufacturer for use with

roofing system.

E. Gypsum Sheathing Board: Where indicated as "Gypsum Sheathing Board" on thedrawings, provide glass fiber faced gypsum sheathing, non-structural, glass mat

faced, silicone treated gypsum core, Georgia Pacific Building Products "DensDeck"

boards, 1/2" thick, or approved equal.

2.4 FASTENERS

A. Metal Decking Insulation Anchors:

Firestone All Purpose fasteners and fastener plates or approved equal, length as

required to meet manufacturer's minimum requirements.

B. Membrane Terminations at Blocking:Fasteners for attachment of asphalt plys or modified bitumen sheets at termination

points on wood blocking shall be 11 gauge, hot dip galvanized, large head, annular

threaded roofing nails, 1-1/2" long.

2.5 ACCESSORIES

A. Termination Bars: Firestone termination bar of 0.100" thick 3003-H14, 3105-H14

or 6063-T5 aluminum

B. Walkway Pads: Provide an additional layer of SBS cap sheet under existing pre-

cast concrete pavers.

C. Sealants:

1. Lap Edge Sealant: Firestone general purpose sealant; silicone rubber, one

part, high solids, gray color.

2. Pourable Sealer: Firestone two part polyurethane pourable sealer for sealing

penetration pockets.


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PART 3 EXECUTION

3.1 DEMOLITION

A. General:

1. Remove existing insulation complete, to the deck below. Do not damage the

roof decking. Remove existing metal coping and flashing complete except

where indicated on the drawings to remain.

2. Clean building, structures and improvements of dust, dirt, and debris caused

by demolition operations, as directed by the Architect or governing

authorities. Return adjacent areas to condition existing prior to start of work.

3. Proceed with demolition in systematic manner. Do not remove more roofing

than can be replaced before the end of daily operations.

4. Make the roof system weatherproof and waterproof at the end of each day's

operations.5. Removed materials shall not be thrown freely from the roof but shall be

lowered to the ground by mechanical devices or in an enclosed chute.

Contractor shall minimize the spread of dust and debris.

B. Demolition Plan:

The Contractor shall submit a detailed roofing demolition plan that describes the

equipment and methods to be used, refuse storage and removal processes, and the

proposed disposal methods. The plan shall also include methods for protecting the

building interior and exterior, traffic control, occupant protection, and security of

the construction site.

C. Demolition Equipment and Methods:

1. Scrape off existing roofing, do not use axes or impact tools.

2. Roof cutting power tools shall be equipped with operable blade depth setting

mechanisms which shall control the cutting depth of the blade. The

Contractor shall take every precaution to avoid cutting the decking. The

Contractor shall repair all decking that is damaged by the demolition

operation at the Contractor's expense.

3. Conveyances: Contractor shall transport demolition debris across the roof in

vehicles that will not damage or overload the roof deck.

4. The Contractor shall provide chutes for debris to be transferred to containers

at grade. Protect the wall behind and adjacent to chute locations withtarpaulins.

5. The use of "bobcat" type removal equipment is prohibited.

D. Disposal of Demolished Materials:

1. Remove from site all debris, rubbish, and other materials resulting from

demolition operations.


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2. Transport materials removed from demolished structures and dispose of off-

site in accordance with regulations and authorities having jurisdiction.

3. The Owner shall designate all crane and refuse container locations. The

Contractor shall repair any lawns or paving damaged during the Contract to

original, or better, condition.

3.2 PULL OUT TESTS

A. Conduct (6) pull-out tests for every 10,000 square feet of roofing, but not less than

(6) tests on each building.

B. Pull-out minimum test values shall be 60 pounds.

3.3 PREPARATION OF SUBSTRATE

A. Comply with manufacturer's instructions for preparation of substrate to receive

system, except where more stringent requirements are indicated.

B. Clean substrate of dust, debris, and other substances detrimental to new work.

Remove sharp projections.

C. Install cant strips, edge strips, flashings, and accessory items as shown, and as

recommended by the manufacturer even though not specifically shown.

D. Verify that work requiring penetration of the deck, or that requires men and

equipment to travel over the roof deck has been completed.

E. Confirm that all surfaces are adequately anchored, even and free of any foreign

material, moisture, or un-evenness.

F. Immediately notify the Architect of any defects. Do not apply the roofing system

until these defects have been corrected.

G. Verify that curbs and nailers are in place and properly installed.

3.4 ASPHALT PRIMER

Apply primer to all wood surfaces and sheet metal surfaces in contact with bituminous

materials, including sheet metal flanges (both sides), prior to flashing installation. Applyprimer by brush at a rate of 100 square feet per gallon with no bare spots. Allow primer

to dry thoroughly before installing the bituminous flashings.

3.5 INSULATION INSTALLATION

A. General:


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1. Extend insulation the full thickness over entire surface to be insulated, cutting

and fitting tightly around obstructions. Do not install more insulation each

day than can be covered with membrane before end of each day and before

start of inclement weather.

2. Do not use any damaged or wet insulation boards.3. Install insulation boards with not more than 1/4" gap between boards.

4. Poorly adhered boards and boards with more than 1/4" gap shall be removed

and replaced.

B. Metal Decking:

Install insulation using anchors and plates specified. Use anchor pattern

recommended by roofing system manufacturer. Install overlayment board in

adhesive.

3.6 ASPHALT BUILT UP ROOF INSTALLATION

A. General:

1. Comply with manufacturer's published instructions, except where more

stringent requirements are indicated.

2. Do not cut or dilute any material with a solvent or dilutant.

3. Specifications are based upon Firestone 3-ply asphalt built-up roofing with

SBS Modified Bitumen Cap sheet, Firestone specification I-3F33-M, for

minimum compliance.

4. Prevent compounds from entering and clogging drains and conductors, and

from spilling or migrating onto surfaces of other work.

5. Extend modified bituminous membrane over and terminate beyond cantsa. Unroll sheet and allow it to relax for the minimum time period required by

manufacturer.

B. Laying Felts:

1. 2-ply installation:

a. Install 2 plies of modified bituminous membrane, consisting of a base

ply and an inner ply, starting at low point of roofing system.

i. Base and Inner Ply application: adhere each ply to substrate in a

squeegee application of cold adhesive applied at a rate required by

roofing system manufacturer.ii. Starting from the low point of the roof, apply a 12" width of ply

felt starter strip, followed by a 24" width directly over the first felt.

Apply remaining felts in full 36" widths in a shingle fashion with

a minimum 24-1/2" overlap, so that at least three plies of felts

cover the entire roof surface.


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2. Lay felts perpendicular to slopes less than 3 inches per foot and parallel on

greater slopes.

3. Broom all felts into hot bitumen and insure that no air is trapped between

plies.

4. Extend roofing sheets up face of cant and cut off evenly minimum 4 " abovecant in accordance with details on drawings.

5. On inclines one inch per foot or more, backnail all plies.

6. No bare spots, dry laps or wrinkles will be accepted. Cut and reset all

fishmouths, and patch with an additional ply of roofing felt. Extend each ply

a minimum of 9 inches in each direction beyond the defective area.

7. Do not use any rolls of felt plys which are oval shaped, which have frayed

ends, or which exhibit similar defects that will effect the smooth rolling of

plys onto the roof surface. Remove defective rolls of material from the

jobsite.

D. Modified Bitumen Cap Sheet:1. Contractor shall obtain the Owner's written approval of the 2-ply asphalt built-

up roofing installation before proceeding with the Cap Sheet installation.

2. Verify that all repairs have been made to defects in the built-up membrane and

surfaces are free of sawdust, dirt, insulation debris and other contaminants

prior to starting application.

3. Cap sheets shall be installed by rolling sheets perpendicular to the slope of the

roof.

4. Starting at the low point of the roof, unroll the first roll of SBS Cap Sheet and

allow to relax.

5. Adhere each ply to substrate in a squeegee application of cold adhesive

applied at a rate required by roofing system manufacturer6. Membrane sheets shall be applied free of wrinkles, creases, fishmouths, or

voids. Maintain alignment of sheets utilizing marked lap lines. Should the

lap lines become mis-aligned during installation, cut the sheet and establish a

new end lap. Do not attempt to realign a partially adhered membrane roll.

7. Inspect cap sheet application for defects. Cut wrinkles, creases, and

fishmouths to relax the membrane. Apply a full width strip of cap sheet

membrane over the defect in a full bed of cold adhesive and lapped a

minimum of 12" beyond the cut. Unbonded lap seams of more than 1/2"

wide shall be embedded in cold adhesive troweled under the unbonded

membrane.

3.7 BASE FLASHING INSTALLATION; MODIFIED BITUMEN

A. Base Flashing Interply Sheet:

1. Install modified bituminous membrane base flashing over cant strips and other

sloping and vertical surfaces, at roof edges, and at penetrations through roof,


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and secure to substrates according to roofing system manufacturer's written

instructions and as follows:

a. Prime substrates with asphalt primer if required by roofing system

manufacturer.

b. Base sheet flashing application: Install base-sheet backer and adhere tosubstrate by torch application.

c. Mineral surfaced flashing Application: Adhere modified bituminous

membrane base flashing to substrate by cold applied application.

2. Extend base flashing up the wall a minimum of 8 inches (200 mm) above roof

membrane and 4 inches (100 mm) onto field of roof membrane.

3. Mechanically fasten top of modified bituminous membrane base flashing

securely at terminations and perimeter of roofing.

a. Seal top termination of base flashing

4. Install modified bituminous stripping where metal flanges and edgings are set

on membrane roofing, according to roofing system manufacturer's written

instructions.

3.8 FLASHINGS AND PENETRATIONS

A. General:

1. Remove all existing flashing except as otherwise indicated on the drawings.

2. Flash all penetrations passing through the cap sheet.

3. The flashing seal shall be made directly to the penetration except as shown in

details with lead sleeves.

B. Roof drains:

1. Remove all existing flashings including lead flashing sheets, roofing materials

and cement from the existing drain.

2. Provide a clean even finish on the mating surfaces between the clamping ringand the drain bowl.

3. Install pre-manufactured tapered insulation around the drain to provide a

smooth transition from the roof surface to the drain. slope shall not exceed 1"

per 12".

4. Install the base sheet, stopping just short of the bowl. Install ply sheets

extending to the inside of the bowl directly beneath the clamping ring.

5. Apply roof mastic to clamping area of the drain bowl and top of the ply

sheets.

6. Install the lead flashing and prime the top surface with asphalt primer.

7. Install a target patch of Modified Bitumen Reinforced flashing over the lead

flashing, down to the inside of the drain bowl.8. Make round holes in the cap sheet and align with clamping bolts.

9. Install the roof drain clamping ring and clamping bolts. Tighten the clamping

bolts to achieve continuous compression.

3.9 TEMPORARY ROOF PROTECTION:


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A. Should precipitation threaten during the work day, protect unfinished, exposed

roofing and flashing components in accordance with manufacturers instructions.

All roofing not receiving 2- plies, shingle pattern, on the same day shall be

considered temporary roofing.

B. Provide temporary cut-offs around exposed edges and incomplete flashing

locations. Remove all cut-offs completely prior to continuing with subsequent

work.

C. Temporary cut-offs shall be constructed of 2-plys of fiberglass roofing felt set in

modified bitumen flashing adhesive on the roof system, and extended onto the

adjacent roofing a minimum of 18". Set the felts onto the existing roof in a full bed

of asphaltic flashing cement and weigh down with wood planks and 20 pounds per

linear foot ballast. Remove all temporary cut offs prior to recommencing roofing

work.

D. New 2-ply membrane shall be installed over all temporary roofing the following

day. The glaze coated roof area shall not be considered part of the finished roof

system.

E. Assume responsibility for sealing exposed roof deck against weather during

installation and for damages due to leakage thereof.

END OF SECTION


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University of Maryland Baltimore CountyColumbus Center Roof Replacement Project No: 12-119

July 24, 2013

FLASHING AND SHEET METAL 07600 - 1

SECTION 07600 FLASHING AND SHEET METAL

PART 1 GENERAL


A. The extent of each type of flashing and sheet metal work is indicated on the drawingsand by provisions of this section.

B. The types of work specified in this section include the following:

1. Metal counter flashing; and base flashing2. Metal wall flashing and expansion joints

3. Prefabricated Coping

4. Miscellaneous sheet metal accessories

1.2 SUBMITTALS

A. Product Data

Submit manufacturers product specifications, installation instructions and general

recommendations for each specified sheet material and fabricated product.

B. Shop DrawingsSubmit shop drawings showing layout, joining, profiles, and anchorages of fabricated

work, including major counter flashings, trim/facia units, gutters, downspouts,

scuppers and expansion joint systems; layouts at scale, details at 3 scale.

C. SamplesSubmit two, 8 square samples of specified sheet materials to be exposed as finished

surfaces.

D. Job Conditions

Coordinate work of this section with interfacing and adjoining work for propersequencing of each installation. Ensure best possible weather resistance and durability

of the work and protect of materials and finishes.

PART 2 PRODUCTS

2.1 FLASHING AND SHEET METAL MATERIALS

A. Aluminum:

ASTM B 209, alloy 3003, temper H14, Kynar 500 finish; 0.40 except as otherwise

indicated.


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B. Zinc Coated Steel:Commercial quality with 0.20% copper, ASTM A 525 except ASTM A 527 for lock

forming, G90 hot dip galvanized, mill phosphatized where indicated for painting;

0.0359 thick (20 gage) except as otherwise indicated.

C. Elastic Sheet Membrane:

Manufacturers standard flexible, elastic, black, non-reinforced, flashing sheet of 50 to65 mils thickness; 50-70 Shore A hardness (ASTM D2240); 1200 psi tensile strength

(ASTM D412); 120 pounds per linear inch tear resistance (ASTM D624, Die C);

ultimate elongation of 250% (ASTM D412): brittleness temperature of -30 degrees F

(ASTM D746): resistance to ozone aging of no cracks for 10% elongated sample for100 hours in 50 ppm ozone at 104 degrees F (ASTM D573); resistance to heat aging

of maximum hardness increase of 15 points, elongation reduction of 40%, and tensile

strength reduction of 30%, for 70 hours at 212 degrees F (ASTM D 573).1. provide butyl synthetic rubber sheet.

2.2 FORMED UNITS

A. General Metal Fabrication:

Shop fabricate work to the greatest extent possible. Comply with details shown, andwith applicable requirements of SMACNA Architectural Sheet Metal Manual and

other recognized industry practices. Fabricate for waterproof and weather resistantperformance; with expansion provisions for running work, sufficient to permanently

prevent leakage, damage or deterioration of the work. Form work to fit substrates.

Comply with material manufacturer instructions and recommendations. Form

exposed sheet metal work without excessive oil-canning, buckling and tool marks, true

to line and levels as indicated, with exposed edges folded back to form hems.

B. Seams:Fabricate non-moving seams in sheet metal with flat-lock seams. For metal other than

aluminum, tin edges to be seamed, form seams, and solder.

C. Expansion Provision:

Where lapped or bayonet type expansion provisions in work cannot be used, or would

not be sufficiently water/weatherproof, form expansion joints of intermeshing hookedflanges, not less than 1 deep, filled with mastic sealant (concealed within joints).

D. Sealant JointsWhere movable, non-expansion type joints are indicated or required for properperformance of work, form metal to provide for proper installation of elastomeric

sealant, in compliance with industry standards.

E. Separation


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Provide for separation of metal from non-compatible metal or corrosive substrates byapplying an elastic sheet membrane to the concealed surfaces at locations of contact,

or other permanent separation as recommended by manufacturer/fabricator.

F. Aluminum Extrusion Units:

1. Fabricate extruded aluminum running units with formed or extruded aluminumjoint covers, for installation behind main members.

2. Fabricate mitered and welded corner units.

2.3 FABRICATED METAL ROOFING ACCESSORIES

A. Aluminum Coping (Cap piece over existing coping)

1. Custom fabricated profiles or as indicated on the drawings, Kynar 500 finish,0.040 minimum thickness for primary legs of extrusions.

2. Provide manufactured, shop-prefabricated, system including pre-formed coping

including special radius corner units, special mitered corner units, 6 spliceplates, and 24- gauge hold cleats with integral neoprene compression pads.

Splice plates shall be treated with factory applied sealant beads.

2.4 MISCELLANEOUS MATERIALS AND ACCESSORIES

A. Fasteners

Stainless steel metal or, other non-corrosive metal as recommended by sheetmanufacturer. Match finish of exposed heads with material being fastened.

B. Metal Accessories

Provide sheet metal clips, straps, anchoring devices and similar accessory units as

required for installation of work, matching or compatible with material being installed,

non-corrosive, size and gage required for performance.

PART 3 EXECUTION

3.1 INSTALLATION REQUIREMENTS

A. GeneralExcept as otherwise indicated, comply with manufacturers installation instructions

and recommendations, and with SMACNA Architectural Sheet Metal Manual.

Anchor units of work securely in place by methods indicated, providing for thermalexpansion of metal units; conceal fasteners where possible, and set units true to line

and level as indicated. Install work with laps, joints and seams which will be

permanently watertight and weatherproof.

B. Underlayment

Where stainless steel or aluminum is to be installed directly on cementitious or wood

substrates, install an elastic sheet membrane on the substrate.C. Installation:


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1. Bed flanges of work in thick coat of bituminous roofing cement where requiredfor waterproof performance.

2. Flashing

a. Install counter flashing in accordance with approved shop drawings and

manufacturers product data to comply with specified performancerequirements. Counter flashing components shall be true to line, without

buckling, creasing, warp or bin in finished surfaces.b. Coordinate counter flashing at roof surfaces with roofing work to provide

weather tight condition at roof terminations.

c. Isolate dissimilar materials to prevent electrolysis.

d. Secure counter flashing using continuous cleats, clips and fasteners inaccordance with product data and as indicated.

3. Install elastic flashing without stretching. Install elastic flashing filler strips to

provide for movement by forming loops of bellows in width of flashing. Locatefiller strips to facilitate complete drainage of water from flashing. Seam flashing

sheets with adhesive, and anchor edges in manner indicated.4. Nail flanges of expansion joint units to curb nailers, at maximum spacing of 6".

Complete seams at joints between units, to form a continuous waterproof

system.

3.2 CLEANING AND PROTECTION

A. Clean exposed metal surfaces, removing substances which might cause corrosion of

metal or deterioration of finishes.

B. Contractor shall protect sheet metal and flashing work during construction to ensure

that work will not be damaged.

END OF SECTION


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EXISTING REMOVED COPING OF HIGH ROOF

EXISTING GALVANIZED STEEL ANGLE

FRAMING UNDER EXISTING EPDM ROOFING


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EXISTING HIGH ROOF COPING SPLICE PLATE

EXISTING HIGH ROOF COPING SPLICE PLATE


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EXISTING HIGH ROOF COPING

EXISTING HIGH ROOF COPING


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July 24, 2013

JOINT SEALERS 07900 - 1

SECTION 07900

JOINT SEALERS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and

Supplementary Conditions and Division 1 Specifications Sections, apply to this

Section.


A. The applications for joint sealers as work of this section include the following:

1. Flashing and coping joints

2. Exterior wall panel joints

1.3 GENERAL PERFORMANCE REQUIREMENTS

A. Except as otherwise indicated, joint sealers are required to establish and maintain

airtight and waterproof continuous seals on a permanent basis, within recognized

limitations of wear and aging as indicated for each application. Failures of installed

sealers to comply with this requirement will be recognized as failures of materials

and workmanship.

1.4 REFERENCES

A. ASTM D 1056 - Flexible Cellular Materials - Sponge or Expanded Rubber.

B. ASTM D 1565 - Flexible Cellular Materials - Vinyl Chloride Polymers and

Copolymers (Open-Cell Foam).

C. FS TT-S-001543 - Sealing Compound, Silicone Rubber Base.

D. SWI (Sealing and Waterproofers Institute) - Sealant and Caulking GuideSpecification.

1.5 SUBMITTALS

A. Product Data: Manufacturer's printed data indicating sealant chemical

characteristics, performance criteria, limitations, and color availability for each


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elastomeric product required.

B. Warranty: Include installed sealants and accessories against failure to achieve air

tight and watertight seal, exhibit loss of adhesion or cohesion, or not cure

1.6 JOB CONDITIONS

A. Weather Conditions:

Do not proceed with installation of liquid sealants under unfavorable weather

conditions. Install elastomeric sealants when temperature is in lower third of

temperature range recommended by the manufacturer for installation.

1.7 QUALITY ASSURANCE

A. Manufacturer: Company specializing in manufacturing products specified in this

Section with a minimum of 20 continuous years of documented experience.

B. Installer: Company specializing in installation of work in this Section with aminimum 5 continuous years of documented experience and approved by sealantmanufacturer.

C. Comply with Sealant and Waterproofers Institute requirements for materials andinstallation.

1.8 ENVIRONMENTAL REQUIREMENTS

A. Do not install solvent curing sealants in enclosed buildings spaces without

sufficient ventilation to maintain LTL solvent vapor levels.

B. Maintain temperature and humidity recommended by the sealant manufacturer

during and after installation.

1.9 WARRANTY

A. Provide 5-year warranty.

PART 2 - PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

A. General:

Manufacturers listed in this article include those known to produce the indicated

category of prime joint sealer material, either as a nominally pure generic product

or as an equivalent performance modification thereof or proprietary product.

B. Manufacturer:


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Subject to compliance with requirements, provide products of one of the following:

1. Euclid Chemical

2. W.R. Meadows

3. Pecora Corp.

4. Sonneborn/Contech5. Tremco, Inc.

2.2 SEALER MATERIALS

A. General Sealer Requirements:

Provide colors indicated or, if not otherwise indicated, as selected by the Architect

from the manufacturer's standard colors. Select materials for compatibility with

joint surfaces and other indicated exposures, and except as otherwise indicated

select modulus of elasticity and hardness or grade recommended by the

manufacturer for each application indicated. Where exposed to foot traffic, select

non-tracking materials of sufficient strength and hardness to withstand stiletto heeltraffic without damage or deterioration of sealer system.

B. Single Component Silicon Rubber Sealant:

Except as otherwise indicated, provide manufacturer's standard, ultra low modulus,

high performance, one part, silicone rubber based, air curing, non-sag, elastomeric

sealant; complying with ASTM C920 Type S Class 25 Grade NS, FS TT-S-

001543A Class A Type Non-sag. Provide Tremco "Spectrem I" or approved equal.

2.3 CELLULAR/FOAM JOINT FILLERS AND SEALANT BACKERS

A. Closed Cell Synthetic Rubber Joint Filler:Provide expanded synthetic rubber complying with ASTM D1056, class SC-E of 2

to 5 psi compression deflection; except provide 13 to 17 psi compression deflection

where filler is applied under sealant exposed to traffic.

2.4 MASKING TAPE

For masking around joints, provide masking tape complying with Fed Spec UU-T-106C.

PART 3 - EXECUTION

3.1 SURFACE CONDITIONS

Examine areas and conditions under which work of this Section will be performed.Correct conditions detrimental to timely and proper completion of Work. Do not proceed

until unsatisfactory conditions are corrected.

3.2 JOINT PREPARATION


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A. Clean joint surfaces immediately before installation of gaskets, sealants or caulking

compounds. Remove dirt, insecure coatings, moisture and other substrates which

could interfere with seal of the gasket or bond of sealant or caulking compound.

Etch concrete and masonry joint surfaces as recommended by sealant manufacturer.

Roughen vitreous and glazed joint surfaces as recommended by the sealantmanufacturer.

B. Prime or seal joint surfaces where indicated, and where recommended by the

sealant manufacturer. Confine primer/sealer to areas of sealant bond; do not allow

spillage or migration onto adjoining surfaces.

C. Steel surface:

1. Steel surfaces in contact with sealant:

a. Clean metal surface with power tools as required to archive acceptable

surface or bond.

b. Use solvent to remove oil and grease, wiping surfaces with clean rags.2. Remove protective coatings on steel with power tools or by using solvent that

leaves no residue.

D. Aluminum surfaces:

1. Aluminum surfaces in contact with sealant:

a. Remove temporary protective coatings, dirt, oil, and grease.

b. When masking tape is used for protective cover, install tape just prior to

applying sealant.

2. Use only nonstaining solvents to remove protective cover, as recommended

for that purpose by manufacturer of aluminum work.

3.3 INSTALLATION

A. Comply with manufacturer's printed instructions except where more stringent

requirements are shown or specified, and except where manufacturer's technical

representative directs otherwise.

B. Set joint filler units at depth or position in joint as indicated to coordinate with

other work, including installation of bond breakers, backer rods and sealants. Do

not leave voids or gaps between ends of joint filler units.

C. Install sealant backer rod for liquid applied sealants, except where shown to beomitted or recommended to be omitted by the sealant manufacturer for application

indicated.

1. Use only backup material recommended by sealant manufacturer and

approved by Architect for particular installation, compressing backup material

25% to 50% to achieve positive and secure fit


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2. When using backup of tube or rod stock, avoid lengthwise stretching of

material. Do not twist or braid hose or rod backup stock.

D. Install bond breaker tape where indicated and where required by the manufacturer's

recommendations to ensure that liquid applied sealants will perform as intended.

E. Thoroughly and completely mask joints where appearance of sealant on adjacent

surfaces would be objectionable.

F. Employ only proven installation techniques, which will ensure that sealants are

deposited in uniform, continuous ribbons without gaps or air pockets, with

complete wetting of joint bond surfaces equally on opposite sides. Except as

otherwise indicated, fill sealant rabbet to a slightly concave surface, slightly below

adjoining surfaces. Where horizontal joints are between a horizontal surface and

vertical surface, fill joint to form a slight cove, so that joint will not trap moisture

and dirt.

G. Install liquid applied sealant to depths as shown or, if not shown, as recommended

by the sealant manufacturer but within the following general limitations, measured

at the center section of beads.

H. Equipment:

1. Apply sealant under pressure with power-actuated or hand gun or other

appropriate means.

2. Use guns with nozzle of proper size, providing sufficient pressure to

completely fill joints as designed.

I. For normal moving joints sealed with elastomeric sealants but not subject to traffic,

fill joints to a depth equal to 50% of joint width, but neither more than 1/2" deep

nor less than 1/4" deep.

J. Do not allow sealants or compounds to overflow from confines of joints, or to spill

onto adjoining work, or to migrate into voids of exposed finishes. Clean adjoining

surfaces by whatever means may be necessary to eliminate evidence of spillage.

3.4 SCHEDULE OF SEALANT APPLICATION

A. Exterior Joints of metal siding, exposed metal trim, metal roofing panels, andcopings: Single Component Silicon Rubber.

3.5 CLEANING UP

A. Remove masking tape immediately after joints have been tooled.


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B. Clean Adjacent surfaces free from sealant as installation progresses, using solvent

or cleaning agent sealant manufacturer recommends.

3.6 CURE AND PROTECTION

A. Cure sealants and caulking compounds in compliance with manufacturer's

instructions and recommendations, to obtain high early bond strength, internal

cohesive strength and surface durability. Replace or restore sealants which are

damaged or deteriorated during construction period.

END OF SECTION

umbc columbus center roof replacement technical specifications

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