roofing application standard (ras) no. 119 … · roofing application standard (ras) no. 119...

2010 FLORIDA BUILDING CODE — TEST PROTOCOLS HVHZ (RAS) 119.1

Scope1.

This application standard covers the proceduresfor installation of mechanically fastened rooftile systems on direct deck or horizontal battensonly. This standard shall be used in conjunctionwith the tile manufacturer’s Product Approvaland RAS 127.

Definitions2.

For definitions of terms used in this applicationstandard, refer to ASTM 1079 and the FloridaBuilding Code, Building.

NOTE #1: The following table provides thecontractor with the choicesavailable for underlayment sys-tems. These systems can only beused on pitches designated in thetable below:

ROOFING APPLICATION STANDARD (RAS) No. 119INSTALLATION OF MECHANICALLY FASTENED ROOF TILE SYSTEMS

Direct Deck & Horizontal Battens Only(Preformed Metals With Edge Returns)

Roof Pitch Battens or Direct Deck Choice of Underlayment

Plastic or Compatible RoofCement at Nails

Penetrating Underlayment Reference

4:12 or greater Either

1. ASTM D 226 TypeII (#30) or ASTMD 2626 (#43)organic base sheetnailed to deck, min.ASTM D 6380,Class M, or WSType II (#90)organic cap sheetset in Type IV hotasphalt.

Required 3.01 A

Either

1. Any ProductApprovedunderlaymentsystem with amechanicallyfastened base sheet,and cap sheet set inhot, cold, or self-adhered.

Per ProductApproval 3.01 B, C, or D

Either3. Product Approval

listed nail-on singleply underlayment

Per ProductApproval 3.01 E

NOTE #2: All tiles shall be interlockingwith waterlocks.

NOTE #3: All approved tiles with integralbatten-lugs used on slopesgreater than 7:12 shall be in-stalled on horizontal battens.

This Roofing Application Standard covers flat,low and high profile roof tiles, using a minimum 3in. tile headlap, or design limited headlap as speci-fied in the tile manufacturers Product Approval,on minimum 15/32 in. solid decking nailed in com-pliance with Chapter 23 (High-Velocity HurricaneZones) of the Florida Building Code, Building.

PART I - GENERAL

1.01

A. Tiles shall not be installed overwet underlayment where mois-ture prohibits adhesion of mas-tic, mortar, or adhesive.

PART II - MATERIALS

2.01 Fasteners:

A. Tiles Fasteners

1. All roof tile nails or fas-teners, except those madeof copper, monel, alumi-num, or stainless steel,shall be tested for corro-sion in compliance withTAS 114 Appendix E,Section 2 (ASTM G 85),for salt spray for 1000 hrs.Tile fasteners used incoastal building zones, asdefined in Chapter 16(High-Velocity HurricaneZones), Florida BuildingCode, Building shall becopper, monel, aluminum,or stainless steel.

2. All roof tile fasteners shallbe of sufficient length to

penetrate a minimum 1/2 in.through the thickness of thedeck or batten,whichever isless, or to penetrate into a 1in., or greater, thickness oflumber not less than 1 in.

3. Storm clips and storm clipfasteners – refer to Prod-uct Approval with fas-tener penetrat ion asabove.

B. Underlayment Fasteners:

1. Fasteners shall be in com-pliance with Section 1523of the Florida BuildingCode, Building (Hereinreferred to as “ApprovedFasteners.”)

(aa) Nails shall be mini-mum 12 gage, annu-lar ring shank nailshaving not less than20 rings per inch;heads not less than 3/8

in. in diameter; andlengths sufficient topenetrate through theplywood panel orwood plank deckingnot less than 3/16 in.,or to penetrate into a1 in., or greater,thickness of lumbernot less than 1 in.Nails shall be hotdipped; electro ormechanically galva-nized to a thicknesssufficient to resistcorrosion in compli-ance with AppendixE of TAS 114. Allnails shall be Mi-ami-Dade listed forcorrosion resistance.All nail cartons orcarbon labels shall belabeled to note com-pliance with corro-sion resistancerequirements. Noroof material shall befully or partially ad-

(RAS) 119.2 2010 FLORIDA BUILDING CODE — TEST PROTOCOLS HVHZ

(RAS) No. 119

(RAS) No. 119


hered (not to includemechanically at-tached) directly to anailable deck.

(bb) Such fasteners shallbe applied through“tin caps” not lessthan 15/8 in. and notmore than 2 in. in di-ameter and of notless than 32 gage(0.010 in.) sheetmetal. All tin capsshall be Miami-Dadelisted for corrosionresistance.

(cc) Prefabricated fas-tener systems com-plying of theFlorida BuildingCode, Building withSect ion 1517.5,may be used, pro-vided they are Mi-ami-Dade listed forcorrosion resis-tance.

2.02 Metal Flashing:

A. Flashing materials shall complywith the requirements set forthin Chapter 15 (High-VelocityHurricane Zones) of the FloridaBuilding Code, Building.

1. Metal accessories forroofs shall be not less than26 gage galvanized, 28gage stainless steel, 16ounce copper, 0.024 inch(0.61 mm) thick alumi-num, lead sheet with aminimum 2.5 lb/sf orequivalent noncorrosivelead metal alloys or com-posite materials manufac-tured for use as rooftermination. All compos-ite and nonmetallic flash-ing materials shall haveProduct Approval.

2. Metal accessories may beof a manufactured, shopfabricated or field fabri-cated type, provided thematerials and fasteners arein compliance with theminimum requirement ofthis Code and shall be in-stalled in compliance withmethods set forth in RAS111.

2.03 Asphaltic Adhesive:

A. Asphalt plastic roof cement -conforming to ASTM D 4586,type II, nonasbestos, non-run-ning, heavy body material com-posed of asphalt and othermineral ingredients.

B. Cold process modified bitumenroofing mastic - conforming toASTM D 3019, Type III.

C. Asphalt - conforming to ASTMD 312, Type IV.

2.04 Adhesive/Sealant:

A. Structural bonding adhesive -conforming to ASTM 3498.

2.05 Mortar:

A. Materials:

1. Roof tile mortar shall ei-ther be a premixed unithaving Product Approvaland tested in compliancewith TAS 123 or a job sitemix approved by thebuilding official and incompliance with RAS113.

B. Mixes:

1. Sand/cement mixes, jobmixed or premixed, shallmeet ASTM C 270 re-

quirement for Type Mmortar (2.25 to 2.5:1 sandto cement ratio).

2. Lightweight aggre-gate/cement mortar mustbe premixed and bagged.

2.06 Eave Closure - CHOOSE ONE of thefollowing:

A. Prefabricated EPDM syntheticrubber conforming to ASTM D1056.

B. Prefabricated metal eave closuremust contain minimum 3/8 in. di-ameter weepholes, spaced notmore than 12 in. apart, flush withthe underlayment.

C. Prefabricated concrete or clayeave closure.

D. Mortar (color optional) on gran-ular surface underlaymentsonly.

E. Antiponding drip edge.

2.07 Sheathing Material shall conform toAPA rated sheathing, in compliancewith Chapter 23 (High-Velocity Hurri-cane Zones) of the Florida BuildingCode, Building.

A. Battens-material to be decay re-sistant species or pressuretreated in compliance withAWPA C2.

1. Battens shal l not bebowed or twisted.

2. Horizontal battens shallbe a minimum nominal 1in. by 2 in.

PART III - EXECUTION

3.01 Underlayment Applicat ions -CHOOSE ONE of the following:

NOTE #4: Anchor/base sheet shall have aminimum of two plies in the val-leys. A No. 30 or No. 43 can beused as a dry in prior to installingthe underlayment with this sys-tem.

A. Hot Mop 30/90, Hot Mop 43/90(see Drawing 1). A No. 30 or No43 anchor/base sheet ASTM D226, Type II, or ASTM D 2626Shall be mechanically attachedto the wood deck with approvedfasteners spaced in a 12 in. gridstaggered in two rows in thefield, and 6 in. on center at thelaps. Extend anchor/base sheet aminimum of 4 in. up vertical sur-faces. Anchor/base sheet endlaps shall be a minimum of 6 in.and head laps shall be a mini-mum of 4 in. Over installed an-chor/base sheet, apply onelayer of mineral surfaced capsheet ASTM D 6380 in full 25#/sq, ± l5 % mopping of asphalt.End laps shall be a minimum of6 in.; head laps shall be a mini-mum of 3 in. and backnailed 12in. on center with approvednails through tin caps or by Mi-ami- Dade listed prefabricatedfasteners.

NOTE #5: The above system may be up-graded by hot mopping aninterply of ASTM listed fiber-glass or perforated organic feltto the anchor sheet before apply-ing the cap sheet. Asphalt appli-cation shall be per abovespecifications.

B. Hot Applied Product ApprovedUnderlayment System (seeDrawing 1). An anchor/basesheet shall be mechanically at-tached to the wood deck with ap-proved fasteners spaced in a 12in. grid staggered in two rows inthe field, and 6 in. on center atthe laps or as specified in theunderlayment manufacturer’sProduct Approval. Anchor/basesheet end laps shall be a mini-mum of 6 in. and head laps shall


(RAS) No. 119

(RAS) No. 119


be a minimum of 4 in. Over in-stalled anchor/base sheet, applyone layer of cap sheet in a full25# /sq. ± 15 percent mopping ofasphalt. End laps shall be a mini-mum of 6 in. on center; head lapsshall be a minimum of 3 in. andbacknailed 12 in. on center withapproved nails through tincapsor by prefabricated fasteners inaccordance with Florida Build-ing Code, Building 1517.5.1 and1517.5.2.

C. Cold-Applied Product-Ap-proved Underlayment System(See Drawing 1). An anchor/base sheet shall be mechani-cally attached to the wood deckwith approved fasteners spacedin a 12 in. grid staggered in tworows in the field and 6 in. on cen-ter at the laps or as specified inthe underlayment manufacturersProduct Approval. Anchor/basesheet end laps shall be a mini-mum of 6 in. and head laps shallbe a minimum of 4 in. Over an-chor/base sheet, apply one layerof cap sheet in a continuouslayer of cold process adhesive atthe rate of 1.5 gallons per 100 sq.ft. or at the rate if so stated in theProduct Approval. Adhesiveshall be applied uniformly inaccordance with the Product Ap-proval with a squeegee or knot-ted brush. Cap sheet side lapsshall be a minimum of 6 in.; headlaps shall be a minimum of 3 in.and backnailed 12 in. on centerwith approved nails throughtincaps or by prefabricated fas-teners in accordance withFlorida Building Code, Building1517.5.1 and 1517.5.1.

D. Product-Approved Anchor/BaseS h e e t / S e l f - A d h e r e dUnderlayment System. The roofcover is terminated at approvedmetal flashings. Any approvedanchor /base sheet as listed in the

Product Approval shall be me-chanically attached to the wooddeck with approved fastenersspaced in a 12 in. grid staggeredin two rows in the field and 6 in.on center at the laps or as speci-fied in the underlayment manu-facturers Product Approval.Anchor/base sheet end laps shallbe a minimum of 6 in. and headlaps shall be a minimum of 4 in.Over anchor/base sheet, applyone layer of any ProductA p p r o v e d , s e l f - a d h e r e dunderlayment in compliancewith the self-adheredunderlayment manufacturers’approval/requirements.

E. Self-Adhered Underlayment(Single Ply). A single plyunderlayment system utilizingany Product approved self-ad-hered underlayment. The roofcover is terminated at approvedmetal flashings. Apply one layerof any self-adheredunderlayment in compliancewith the underlayment manufac-turers’ approved/requirements.

3.02 Drip Edge Metal - CHOOSE ONE ofthe following:

DRAWING 1TYPICAL 30/90 HOT MOP

NOTE #6: Drip edge deck flange shall beprimed with ASTM D 41 asphaltprimer.

A. Two-ply underlayment systems.(See Drawing 2)

1. Drip edge metal shall be in-stalled over anchor/basesheet, fastened 4 in. on cen-ter with approved 11/4 in.roofing nails or approvedfasteners. All joints shall belapped a minimum of 4 in.ensuring water sheddingcapabilities and apply ap-proved plastic roof cementbetween laps.

B. When drip edge metal shall be in-stalled at eaves and gables over atwo ply underlayment system:The metal profile shall be placedin a minimum 3/16 in. bead of con-tinuous ASTM D 4586 plasticroof cement and fastened 4 in. oncenter with approved 11/4 in. roof-ing nails or approved fasteners.All metal joints shall be lapped aminimum of 4 in. ensuring watershedding capabilities and applyapproved plastic roof cement be-tween laps. The metal profile andcap sheet shall be joined with atwo ply application of cotton or fi-berglass fabric reinforcement,both set in a full bed of approvedplastic roof cement. As an alter-nate, the metal may be stripped inwith a 6 in. strip of torch, hot as-phalt or cold adhesive polyesterreinforced modified bitumen.Joints shall be feathered with coldadhesive, hot asphalt or a torch toenhance water flow across the“backlap.”

C. Single-Ply UnderlaymentSystems:

.

1. Drip edge metal shall be in-stalled at the eave, over theunderlayment or in accor-dance with theunderlayment manufac-

turer’s Product Approval.The metal shall be fastened4 in. on center with ap-proved 11/4 in. roofing nailsor approved fasteners ofcompatible metals. Alljoints shall be lapped a min-imum of 4 in. ensuring wa-ter shedding capabilitiesand apply approved plasticroof cement between laps.

2. Strip-in metal with mini-mum 6 in. strip of the sin-gle ply underlayment or inaccordance with theunderlayment manufac-turer’s Product Approval,using primer and/or ap-proved compatible masticif so directed by single plymanufacturer require-ments.

3.03 Gable Treatment — CHOOSE ONE ofthe following:

A. Underlayment Wrapped Gable.(This option shall not be usedwithout installing rake tiles onall rakes.)

1. Trim underlayment at fas-cia or barge board. Install apeel-and-stick under-layment extending under-layment beyond rake/gableend. Fold down and seal


(RAS) No. 119

DRAWING 2DRIP EDGE INSTALLATION

(RAS) No. 119


onto fascia or barge boardmaximum 21/2 in. Addition-ally secure with approvedfasteners through tin capsor approved preassembledcap nails in accordancewith Section 1517.5 of theFlorida Building Code,Building spaced at a maxi-mum of 12 in. on center.

B. Metal Finish.

Drip edge metal shall beinstalled at the gable, overor between theunderlayment plies. Themetal shall be installed perchoices l is ted above(3.02) to ensure watershedding capabilities ofall metal laps.

3.04 Valleys - CHOOSE ONE of the fol-lowing:

NOTE #7: Where special conditions exist,it may be necessary to increasethe width of the valley metaland/or panflashing.

A. Over underlayment install pre-formed closed valley of a mini-mum width of 16 in. (24 in.stretch-out) with a minimum 21/2

in. high center diverter and mini-mum 1 in. metal edge returns. Alljoints shall be lapped a minimumof 6 in. ensuring water sheddingcapabilities and apply approvedplastic roof cement between laps(see Drawing 3).

B. Over underlayment installperformed open valley with a

minimum of 16 in. (24 in.stretch-out) with a minimum 1 in.high twin center diverter andminimum 1 in. metal edge re-turns. All joints shall be lapped aminimum of 6 in. ensuring watershedding capabilities and applyapproved plastic roof cement be-tween laps (see Drawing 4).

1. Secure with approved clipsfabricated from similar orcompatible material. Clip 1in. metal edge returns to ei-ther deck or batten stripwith 2 approved 11/4 in.roofing nails through metalstrap set inplastic roof ce-ment when clip is direct todeck. Spacing of clips to bemaximum 12 in. on centeror fastened to each batten.

2. Trim metal at all val-ley/ridge junctions, ensur-ing water sheddingcapabilities onto the val-ley.

DRAWING 3PERFORMED CLOSED VALLEY

(NAIL-ON SYSTEM)

3. Install lead soaker at allvalley/ridge junctions.Turn lead up a minimumof 1 in. to create a water di-verter, ensuring watershedding capabilities ontothe valley.

3.05 Valley Termination onto Roof Plane

A. When valley terminates ontoroof plane, install in accordancewith standard valley flashingprocedures:

1. Apply a lead soaker/skirtunderneath the eave endof valley to carry water offthe valley back onto thefield tile (see Drawing5).

2. If lead skirt is not used, ex-tend complete width ofvalley metal to carry wateroff the valley back ontothe field tile.

NOTE #8: Where linear footage exceeds20' it may be necessary to in-crease the width of the valleymetal and/or pan flashing. In all

cases, flashing shall be designedto adequately direct water backonto the tiles.

3.06 Flashing and Counterflashings at WallAbutments (see Drawing 6).

A. Install preformed metal wall tray5 in. vertical flange, 6 in. baseflange with 1 in. metal edge re-turn flush to base of walls overunderlayment. Start at lowerportion and work up to ensurewatertight application.

B. Secure with clips fabricated fromcompatible material maximum 12in. on center or spacing of battens.Clip 1 in. metal edge return todeck or batten strip with approved11/4 in. roofing nails through themetal strap. Seal all penetrationswith plastic roof cement.

C. Fasten vertical metal flange 6 in.on center with approved nailswithin 1 in. of outside edge. Lapjoints a minimum of 4 in. andseal joints with plastic roof ce-ment.

D. Seal along entire edge of verticalmetal flange, covering all fas-tener penetrations with flashingcement and membrane.


(RAS) No. 119

DRAWING 5NAIL-ON VALLEY SYSTEMVALLEY METAL OVER TILE

DRAWING 4VALLEY METAL DETAIL

(NAIL-ON SYSTEM)

(RAS) No. 119

E. Metal counterflashing shall beinstalled: lap top flange of baseflashing a minimum of 3 in. Fas-ten metal within 1 in. of outsideedge a minimum of 6 in. on cen-ter or set metal into reglets andseal thoroughly. Lap joints aminimum of 4 in. ensuring watershedding capabilities and applyplastic roof cement or sealantbetween the laps.

3.07 Head & Apron Flashing.

A. Install apron flashing a mini-mum 4 in. on tile surface. Fastenvertical flange of flashing within1 in. of metal edge with ap-proved fasteners 6 in. on center.Seal along entire edge of verticalmetal flange, covering all fas-tener penetrations with flashingcement and membrane.

3.08 Standard Curb Mounted Skylights,Chimneys, etc.

A. Curbs shall be a minimum of 2in. x 6 in., and a minimum 2 in.above upper-most adjacent fin-ished tile surface.

B. Install a minimum 12 in. widthlead at eave end of each curb.

C. Secure with approved fasteners6 in. on center, ensuring fasten-ers will be covered by sky-light/hood vent flange.

D. Continue with flexible or rigidflashing on both sides of the curbworking up toward ridge. Trimas necessary to ensure watershedding onto field tile.

E. Secure with approved fasteners6 in. on center.

.

F. The flexible or ridged flashing atridge end (upper side) of curbshall extend a minimum 6 in.past each side of curb and shall atleast cover the full width of theside flashing immediately be-low.

G. Seal all fastener penetrations, atskylight or hood vent joints withapproved sealant.

NOTE #9: For self-curbing or prefabri-cated skylights, curb height shallbe min. 6 in. and min 2 in. abovemost adjacent finished tile sur-face and installation shall be inaccordance with skylight manu-facturer’s Product Approval.For turbines and other Productapproved accessories, refer tothe accessory manufacturer’sProduct Approval.

3.09 Pipes, Stacks, Vents, Etc. (see Draw-ings 7 and 8).

A. Seal around penetration withplastic roof cement or approvedsealant.

B. Apply skirt flashing over lastfield tile cut previously installedextending under the course oftile above the penetration.

C. Flashing shall be 18 in. x 18 in.minimum and be of sufficient


DRAWING 6WALL FLASHING DETAIL

(NAIL-ON SYSTEM)

width to redirect the water awayfrom penetration.

D. Seal flashing to tile with ap-proved sealant.

NOTE #10: Profile specific ventilators shallbe installed as per manufac-turer’s installation instructions.

3.10 Batten Installation:

Four-foot horizontal battens are required. Whenutilizing battens, preformed metal flashing withmetal edge returns must be used.

NOTE #11: Battens are optional from 4:12up to and including 7:12 pitch.

A. Install top edge of horizontalbatten to horizontal line. Hori-zontal battens shall be a mini-mum nominal 1 in. x 2 in.

B. Fasten and secure maximum 24in. on center with screws or fas-teners of sufficient length to pene-trate through the sheathing aminimum of 3/4 in. or to penetrateinto a 1 in., or greater, thickness oflumber not less than 1 in.

C. Leave 1/2 in. space between bat-ten ends.

3.11 Tile Installation.

A. Eave Treatment - CHOOSEONE of the following:

NOTE #12: All fastener Penetrations shallbe sealed.

1. Prefabricated EPDM Syn-thetic Rubber - Install clo-sure strip along eave.Fasten insert each piece at12 in. on center (seeDrawing 9 all fastenerpenetration shall be sealedwith compatible material).

2. Metal Eave Closure - In-stall closure strip eave.Fasten a minimum 12 in.on center with approvedfasteners. If metal is inclu-sive of drip edge, fasten 4in. on center. (see Draw-ing 10).

3. Raised Fascia/WoodStarter Strip when using a3/4 in. raised fascia, a nom-inal 2 in. x 2 in. woodstarter strip must be in-stalled behind fascia.Choose one of the follow-ing:

(aa) Install fascia boardapproximately 11/2

in. above roof deck


(RAS) No. 119

DRAWING 7PLUMBING STACKS(NAIL-ON SYSTEMS)

DRAWING 8PLUMBING STACKS FLASHING

(NAIL-ON SYSTEMS)

(RAS) No. 119

or a nominal 2 in. x 2in. wood starter stripat roof edge (seeDrawing 11).

(bb) Install 8 in. taperedcant strip at eave be-hind fascia and/orstarter strip to sup-port metal flashing.Install a minimum 8in. wide anti-ponding metal flash-ing to ensure positivedrainage over fas-cia/starter strip. Fas-ten top edge of flangeonto roof and fasteneave edge to raisedfascia detail with ap-proved fastener 4 in.on center.

4. Prefabricated Concrete orClay Eave Closure — fas-tened in accordance withmanufacturer’s ProductApproval with approvedfasteners.

5. Mortar Application - In-stall mortar to elevate eaveedge.

(aa) Apply mortar alongthe eave edge, ap-plying enough mor-tar to elevate theeave end of the tileto be on profile withthe remaining rooftile.

(bb) Point and smoothfinish flush to eaveline.

(cc) Apply minimum 3/8in. weephole flushwith the roofunderlayment shallbe formed at the


DRAWING 9EAVE TILE DETAIL

(NAIL-ON EPDM EAVE ENCLOSURE)


(NAIL-ON METAL EAVE ENCLOSURE)


(NAIL-ON ANTIPONDING ENCLOSURE)

spacing of not lessthan one weepholeper tile.

(dd) Mortar eave closuresshall only be usedwith granular surfaceunderlayment.

B. Storm Clips. Storm clips shall berequired at the first course of tile.The use of other alternatives in-cluding an adhesive is an accept-able means for fastening the firstcourse of tile as long as it is partof an approved roofing systemand meets the requirements forChapter 16 of the Florida Build-ing Code, Building for wind re-sistance.

NOTE #13: Tile shall be attached to resist thedesign pressures for the build-ing. See Chapter 16 (High-Ve-locity Hurricane Zones) of theFlorida Building Code, Buildingand RAS 127. See Tile manufac-turers Product Approval for at-tachment resistance values,which must exceed the requiredcalculated design pressures ofthe structure.

3.12 Valleys - CHOOSE ONE of the fol-lowing:

NOTE #14: It may be necessary to removethe lugs from the field tile and/orinstall batten extenders at walland valley flashings for properpositioning of cut field tiles andto facilitate water flow.

A. Preformed Metal With 1 in. Re-turns:

1. Closed Valley - Miter tileto form straight border oneither side of water di-verter (see Drawing 5).

2. Open Valley - Miter tile toform straight border on ei-

ther side of two waterdiverters (See Drawing 4).

3.13 Hip and Ridge Nailer Boards or Pre-formed Metal Channel (See Drawing12 - Details 1, 2, 3 and 4 are also ac-cepted methods of installing Hip andRidge Nailer Boards.)

A. Wood nailers or preformedmetal channel shall be attachedin compliance with Chapter 16(High-Veloci ty HurricaneZones) of the Florida BuildingCode, Building.

B. Wood nailer boards shall be se-cured with hot dipped zinccoated galvanized steel straps ofa minimum thickness of 1/8 in.by 1 1/4 in. wide. The galvanizedsteel straps shall be installed at amaximum spacing of 12 in. oncenter along the length of theridge nailer boards. Steel strapsshall be bent to fit over the ridgenailer boards, and shall be se-cured to the sheathing with aminimum of six #6-#8 corrosionresistant screws per strap, at amaximum spacing of 4 in. oncenter.

C. Preformed Metal Channel

Preformed Metal Channels shallbe secured 6 in. on center withapproved fasteners. All fastenerpenetrations shall be sealed withplastic roof cement.

D. Hip and Ridge Tile Installation -CHOOSE ONE of the follow-ing:

1. Self-adhered Membrane

(aa) Install self-adheredmembrane overnailer board andseal to tile surfaceper membrane

(RAS) 119.12 FLORIDA BUILDING CODE—TEST PROTOCOLS HVHZ

(RAS) No. 119

(RAS) No. 119


manufacturer’s rec-ommendation.

(bb) Install hip and ridgetiles with corrosionresistant approvednails or screws ofsufficient length topenetrate a mini-mum of 3/4 in. intonailer board lappingtile a minimum of 2

in. (Approved adhe-sive, in lieu of nailsor screws, is per-mitted when usingDetail 2 and 3.When using adhe-sive, hip and ridgetiles shall be in-stalled in accor-dance with theadhesive manufac-turer’s Product Ap-proval).

1/8: x 1-1/4” HOT DIPPED

ZINC COATED

GALVANIZED METAL

STRAP BENT

2x6 or 2X8 HIP OR RIDGE

NAILER PRESSURE TREATED

HIP OR RIDGE TILE

SEAL ALL NAIL PENETRATIONS

WOOD NAILER SET IN A

CONTINUOUS BED OF APPROVED

ADHESIVE

20 GAGE HOT DIPPED

ZINC COATED

GALVANIZED x 1 STEEL

STRAPS SPACED 24 o.c.

FASTENED IN ACCORDANCE

WITH RAS 119 SECTION 3.12(B)

ROOF FRAMING

PLYWOOD ROOF SHEATING

ROOF UNDERLAYMENT

BARREL OR FLAT TILE

BATTENS (AS REQ’D)

HIP OR RIDGE TILE

NAILING DETAIL

MINIMUM 2x2 INCH

LUMBER IN ACCORDANCE WITH

RAS 118 SECTION 2.07(A)

MINIMUM 2x2 INCH

LUMBER IN ACCORDANCE WITH

RAS 118 SECTION 2.07(A)

NOMINAL 1x2 CONTINUOUS PT #2

SP BATTENS OPTIONAL (PROVIDE

2-#8 X 1 ½ GALV. PH SCREWS WITH

OPTION.PROVIDE 2-#8 X 1 GALV. PH

SCREWS WITHOUT OPTION)

1½

1

4

1

EQ

.

EQ

.

1

8

1

DETAIL 5

12

4

ROOF TILE

2x6 #2 PT BLOCKING

(VARY DEPTH OF BLOCKING TO

ACCOMMODATE PITCH OF ROOF)

NAIL TILE IN ACCORDANCE

WITH PRODUCT APPROVAL NOA.

DETAIL 4

4 x 1 ½ x 0 -6 18 GAGE

HOT DIP GALV. STEEL PLATE

SET IN ROOFING CEMENT.

FASTEN PLATE WITH 2-#8 x 1 ½

GALV. PH SCREWS INTO PLYWOOD

DECK & 2-#8 x 1 ¼ GALV. PH

SCREWS INTO 2x6. PROVIDE @ 24 o.c.

(STAGGER SPACING)

26 GAGE G-90

PREFORMED METAL CHANNEL

FASTENED 6 o.c. WITH

APPROVED ROOFING NAILS

APPROVED ADHESIVE

STEEL PLATE DETAIL

DETAIL 2

DETAIL 3

DETAIL 1

ROOF TRUSS

DRAWING 12HIP RIDGE TILENAILING DETAIL

(cc) Use approved adhe-sive or clips at over-laps.

2. Mortar

(aa) Set hip and ridge tilein a continuous bedof mortar, lappingtile a minimum 2 in.Ensure bed of mortar does not pro-trude in center ofhip or ridge junc-t ion. Approxi-mately 1 in. of fieldtile shall extend be-yond bed of mortar.

(bb) Install hip and ridgetiles with approvedcorrosion resistantnails or screws ofsufficient length topenetrate a mini-mum of 3/4 in. intonailer board. (Ap-proved adhesive, inlieu of nails orscrews, is permittedwhen using Details2 and 3. When usingadhesive hip andridge tiles shall beinstalled in accor-dance with the adhe-sive manufacturer’sProduct Approval.)

(cc) Point mortar to fin-ish surface.

3.14 Rake/Gable Tile - CHOOSE ONE ofthe following:

A. Rake/Gable Tile

1. Install first rake tile to ex-posed length of firstcourse of field tile withfactory finish of rake tiletowards the eave.

2. Fasten rake tile with a mini-mum two 10D nails of suf-ficient length to penetratethe framing a minimum of3/4 in.

3. Abut each succeedingrake tile to the nose of thetile above and maintain aconstant headlap.

B. Mortar Finish:

1. Place mortar bed alongroof edge.

2. Point smooth to a straightedge finish.

C. Metal Finish

1. Install prefabricated gablemetal with 1 in. water re-turn.

2. Fasten by clipping 12 in.on center or spacing ofbattens.

NOTE #15: Rake tile application at finishingend may need special consider-ation to provide proper drainage,i.e. flashing or sealant may beneeded.

3.15 Wall Abutments:

A. Cut tile to fit approximately 1/2 in.to base of walls. Point up mortar isoptional.

NOTE #16: It may be necessary to removethe lugs from the field tile and/orinstall batten extenders at walland valley flashings for properpositioning of cut field tiles. Fortiles installed at headwalls, tileshall be installed with approvedroof tile adhesive. Fill void atheadwall with mortar and pointto finish.


(RAS) No. 119

roofing application standard (ras) no. 119 … · roofing application standard (ras) no. 119...

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