Flashings, Fasteners & Accessories

Flashing Designs

Also Referred to as Trims Press/Folder Broke Strippable Film Applied Made Per Order in Shop Standard Shape, Custom Sizes 10’-0” Standard or up to 20’-0” Architectural “Box” Flashings Commercial Sculptured

Architectural / Residential / Commercial

Press/Folder Broke Flashings

Arch. / Res. Flashings

Architectural Eave/Drip Edge

Note: Panel field hemmed.

Architectural/Residential Gutter

Note: Post-hung gutter system.

Architectural Valley

Note: Water diverter should equal panel rib height.

Architectural Rake/Gable

Note: Rake/Gable flashings should be installed working from bottom to top of roof.

Architectural Rake/Sidewall

Architectural Ridge/Hip

Vented Ridge

Sculptured Commercial Flashings

Commercial Gutters

Sculptured Post-Hung Gutter System

Box Pre-Hung Gutter System

Flashing Packaging

Shrink Wrapped

Wood Crate

Four questions to help determine the proper fastener:

1. What materials are being fastened?

2. What are the load requirements?

3. What are the service requirements?

4. What is the environment?

Fasteners/Screws

• List each type of material (steel, wood, rigid insulation).

•List the thickness of each material. (Determines attachment thickness)

#1 What materials are being fastened?

Steel Purlin

Wood Decking Steel Decking

Allow at least 3 threads to extend beyond all materials.(Screw will be at least 1/2” – 1” longer than attachment length.)

Attachment thickness + ½”

#1 What materials are being fastened?

1. Uplift loadRelates to the pullout / tensile / pullover strength of the screw – washer.

2. Shear loadRelates to the shear strength / ductility of the screw.

ShearShear

TensileBending

Pullover

#2 What are the load requi rements?

Is there...•Vibration?•Expansion & Contraction?•Prying on the Joint?

Identify conditions that can affect the screws performance.

#3 What are the service requirements?

Determine...•Corrosion potential•Dissimilar metals

#4 What is the environment?

1. CONCEALED FASTENER CONDITIONS

Fastener/Screw Applications

2. EXPOSED FASTENER CONDITIONS

Fastener/Screw Applications

To eliminate confusion and assure the proper fastener is used, specifications for tapping screws should be written to include:1. Thread diameter2. Threads per inch3. Screw Length4. Point Type5. Type of screw6. Drive size7. Head style8. Fastener material9. Finish / plating / corrosion resistance (salt spray)

Fastener/Screw Terminology

Description: #12-14 x 1-1/4” DP2 Self-Drilling Screw. 5/16” Hex Washer Head. Undercut with EPDM Sealing Washer. Carbon Steel. Zinc Plated with 1,000hrs salt spray coating.

Head Style

Major Diameter

Threads Per Inch

Fastener Length

Point Type

#12 - 14 x 1-1/4” DP2 5/16” HWH

Major Diameter

Threads Per Inch

Fastener Length

Point Type

Head Style

Fastener/Screw Terminology

2. “Fine” ThreadUse in thick metal

•Slower to install.

•Provides more thread engagement.

1. “Coarse” ThreadUse in thin metal and wood.

•“Steep” thread installs faster.

•“Steep” thread loosens more quickly.

Fastener Thread Types

TWO GENERAL TYPES OF THREADS

Point Type Drilling ThicknessDP1 Thin (.018” - .090”)

DP2 Thin Medium (.035” - .140”)

DP3 Medium (.090” - .250”)

DP4 Medium/Heavy (.145” - .375”)

DP5 Heavy (.250” - .500”)A - DP1

Light Gauge(Thin Metal) B - DP5

Heavy Gauge

The thicker the material to be fastened, the larger the point “Type”.

Self Driller Point Types

B

A

Flange Seal Head

Sealant MaterialsEPDM: Standard(Non conductive)

Neoprene: Petrochemical

• Optimal sealing performance when installed at an angle.

• Provides greater pullover strength.

• Nicer installed appearance.• Paint damage minimal.• More back-out resistance

Bonded Washers

Fastener/Screw Washer Types

Material and Finish• 18-8 Stainless Steel (302, 304, 305, 316) - Passivated• 410 Stainless Steel – Passivated and Plated• 410 Stainless Steel – Passivated• Carbon Steel – Long-life Coated• Carbon Steel - Zinc Plated

Increased Corrosion Resistance

Zinc Plated

Fastener/Screw Corrosion

Long Life Coated Stainless Steel

1/8” Pop RivetPop rivets are used to hold two pieces of sheet metal together, common at flashing laps, using a 2-Step method;

Step #1 - 1/8” Hole is Drilled Through both Pieces.

Step #2 - Insert Pop Rivet in Hole with Rivet Gun

Standing Seam Panel Clips

1. Floating Clip:•Independent base and tab.•Used with panel lengths greater than 30’-0”.

TWO GENERAL TYPES OF CONCEALED CLIPS

2. Fixed Clip:•One solid piece.•Used with panel lengths less than 30’-0” or snap down panels.

Note: Base of floating clipshould be centered when installed.

Thermal Expansion & ContractionDefinition: The natural characteristic of a length of metal to expand or contract relevant to a change in the metals temperature. Heat and sun expands/Cooling and shade contracts.

SealantsTWO GENERAL FORMS OF SEALANT

1. Tube Sealant•Polyurethane based.•Average usage per tube of 25’-0”.

Sealants

2. Roll/Tape Sealant•Double beaded butyl sealant•Roll lengths of 40’-0”.

TWO GENERAL FORMS OF SEALANT

Roof Boots/Jacks

Note: Silicone boots used on high temp penetrations.