ROOFING APPLICATION STANDARD (RAS) No. 118 …...TAS 114, Appendix E, Section 2 (ASTM G 85), for salt spray for 1,000 hours. Tile fasteners used in coastal building zones, as define

2010 FLORIDA BUILDING CODE — TEST PROTOCOLS HVHZ (RAS) 118.1

Scope1.

This application standard covers the proceduresfor installation of mechanically fastened rooftile systems on direct deck or counter 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 be

used on pitches designated in thetable below:

NOTE #2: All approved tiles with integralbatten-lugs, installed on counterbattens may be installed onslopes up to and including 7:12.Above 7:12 horizontal battensare required unless restricted byproduct design (tile without bat-ten lugs). When utilizing hori-zontal battens comply with RAS119.

This roofing application standard covers Flat, Lowand High profile roof tile, using a minimum 3- in.tile headlap, or design limited headlap as specifiedin the tile manufacturers Product Approval, onminimum 15/32-in. solid decking nailed in compli-ance with Chapter 23 (High-Velocity HurricaneZones) of the Florida Building Code, Building.

ROOFING APPLICATION STANDARD (RAS) No. 118INSTALLATION OF MECHANICALLY FASTENED ROOF TILE SYSTEMS

Direct Deck & Counter Battens Only

Roof PitchCounter Battens or

Direct DeckChoice of

Underlayment

Plastic or Compatible RoofCement at Nails Penetrating

Underlayment Reference

4: 12” or greater Either

1. ASTM D 226 Type II (#30) orASTM D 2626 (#43) organicbase sheet nailed to deck, min.(#90) ASTM D 6380, Class Mor WS, Type II organic capsheet set in Type IV hotasphalt.

Required 3.01A

Either

2. Any Product ApprovalApproved underlaymentsystem with a mechanicallyfastened base sheet, and capsheet set in hot, cold orself-adhered.

Per Product Approval 3.01B, C or D

Either3. Product Approval Listed

Approved nail-on single- plyunderlayment.

Per Product Approval 3.01 E

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. Tile 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 1,000hours. Tile fasteners usedin coastal building zones,as define in Chapter 16(High-Velocity HurricaneZones), shall be copper,monel, aluminum or stain-less steel.

2. All roof tile fasteners shallbe of sufficient length topenetrate 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 this Section1523 of the Florida Build-ing Code, Building(Herein referred to as“Approved Fasteners”).

(aa) Nails shall be mini-mum 12 gage, annu-lar ring shank nailshaving not less than20 rings per inch;heads not less than3/8 in. in diameter;and lengths suffi-cient to penetratethrough the ply-wood panel or woodplank decking notless than 3/16 in, orto penetrate into a 1in., or greater, thick-ness of lumber notless than 1 in. Nailsshall be hot dipped;electro or mechani-cally galvanized to athickness sufficientto resist corrosion incompliance withAppendix E of TAS114. All nails shallbe Miami-Dadelisted for corrosiveresistance. All nailcartons or carbon la-bels shall be labeledto note compliancewith corrosion re-sistance require-ments . No roofmaterial shall befully or partially ad-hered (not to in-clude mechanicallyattached) directly toa nailable 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 inch) sheetmetal. All tin capsshall be Miami-Dadelisted for corrosiveresistance.

(cc) Prefabricated fas-tener systems com-plying with Section1517.5, may be

(RAS) 118.2 2010 FLORIDA BUILDING CODE — TEST PROTOCOLS HVHZ

(RAS) No. 118

used, provided theyare Miami-Dadelisted for corrosiveresistance.

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 for roofsshall be not less than 26gage galvanized, 28 gagestainless steel, 16-ouncecopper, 0.024-inch (.61mm) thick aluminum, leadsheet with a minimum 2.5pound per square foot (psf)or equivalent noncorrosivelead metal alloys or com-posite materials manufac-tured for use as rooftermination. All compositeand nonmetallic flashingmaterials shall have Prod-uct 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 I, 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.

(RAS) No. 118


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 decayresistant species or pressuretreated in compliance withAWPA C2.

1. Battens shall not be bowedor twisted.

2. Vertical battens shall be aminimum of nominal 1 in.by 4 in., horizontal battensshall be a minimum ofnominal 1 in. by 2 in.

PART III - EXECUTION

3.01 Underlayment Applications– CHOOSEONE of the following:

NOTE #3: 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 one layerof mineral surfaced cap sheetASTM D 6380 in full 25 lb./sq, ±l5 percent mopping of asphalt.End laps shall be a minimum of 6

in.; head laps shall be a mini-mum of 3 in. and backnailed 12in. on center with approved nailsthrough tincaps or by Mi-ami-Dade listed for corrosion re-sistance prefabricated fastenersin accordance with FloridaBuilding Code, Building1517.5.1 and 1517.5.2.

NOTE #4: 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 (unlessdirected otherwise by ProductApproval) with approved fas-teners spaced in a 12 in. gridstaggered in two rows in thefield, and 6 in. on center at thelaps or as specified in theunderlayment manufacturer’sProduct Approval. Anchor/basesheet end laps shall be a mini-mum of 6 in. and head laps shallbe 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-


(RAS) No. 118

DRAWING 1TYPICAL 30/90 HOT MOP

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 an-chor/base sheet shall be mechan-ically 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 in ac-cordance with the Product Ap-proval with a squeegee orknotted brush. Cap sheet sidelaps shall be a minimum of 6 in.;head laps shall be a minimum of3 in. and backnailed 12 in. oncenter with approved nailsthrough tincaps or by prefabri-cated fasteners in accordancewith Florida Building Code,Building 1517.5.1 and 1517.5.2.

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 theProduct 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-facturer’s Product Approval.Anchor/base sheet end laps shall

be a minimum of 6 in. and headlaps shall be a minimum of 4 in.Over anchor/base sheet, applyone layer of any ProductApproved, self-adheredunderlayment 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-turer’s approved/requirements.

3.02 Drip Edge Metal – CHOOSE ONE ofthe following:

NOTE #5: 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 approvefasteners. 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 joints shall be lapped a mini-mum of 4 in. ensuring water shed-

(RAS) No. 118


ding capabilities and applyapproved plastic roof cement be-tween laps. The metal profile andcap sheet shall be joined with atwo-ply application of cotton orfiberglass 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 Underlayment Sys-tems:

1. Drip-edge metal shall be in-stalled at the eave, over theunderlayment or in accor-dance with the underlaymentmanufacturer’s ProductApproval. The metal shallbe fastened 4 in. on centerwith approved 11/4-in. roof-ing nails or approved fas-teners of compatiblemetals. All joints shall belapped a minimum of 4 in.ensuring water sheddingcapabilities and apply ap-proved plastic roof cementbetween laps.

2. Strip in metal with a 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’s require-ments.

3.03 Valleys – CHOOSE ONE of the fol-lowing:

NOTE #6 All metal surfaces to receive capsheet shall be primed withASTM D 41 asphalt primer.

A. Two-Ply System – CHOOSEONE of the following:

1. Preformed metal withoutreturns or standard rollmetal 16 in. wide shall beplaced over the an-chor/base sheet in the val-ley and shall be fastened 6in. on center with 12 ga.corrosion-resistant roofnails, or other approvedfasteners of compatiblemetals near the outsideedge of the valley metal.All joints shall be lapped aminimum of 6 in. ensuringwater shedding capabili-ties and apply approvedplastic roof cement be-tween laps (see Drawing3).

2. Preformed metal withoutreturns or standard rollmetal 16 in. wide shall beplaced in the valley on topof the cap sheet and fas-tened 6 in. on center with12 ga. corrosion-resistantroof nails, or other ap-proved fasteners of com-patible metals near theoutside edge of the valleymetal. All joints shall belapped a minimum of 6 in.ensuring water sheddingcapabilities and apply ap-proved plastic roof ce-ment between laps. Thecap sheet shall be joinedwith 1/8 -in. bed of plasticroof cement and a 4-in.strip of asphalt saturatedcotton or fiberglass fabric.The fabric shall be fully


(RAS) No. 118

DRAWING 2DRIP EDGE INSTALLATION

embedded in the plasticroof cement. An optional#90 sweat sheet 36 in.wide may be applied priorto the installation of thevalley metal and capsheet.

B. Single-Ply System (See Draw-ing 4):

1. Preformed metal withoutreturns 16 in. wide shall beplaced in the valley andshall be installed and fas-tened 6 in. on center with12 ga., corrosion- resistantroof nails, or other ap-proved fasteners of com-patible metals near theoutside edge of the valleymetal. All joints shall belapped a minimum of 6 in.,ensuring water sheddingcapabilities and apply ap-proved plastic roof ce-ment between laps. Theunderlayment shall bejoined with a bed of plasticroof cement and a 4-in.strip of asphalt saturatedcotton or fiberglass fabricor in accordance with theunderlayment manufac-turer’s Product Approval.The fabric shall be fullyembedded in the plasticroof cement. An optional#90 sweat sheet 36 in.wide may be applied priorto the installation of thevalley metal and capsheet.

2. Standard roll metal 16 in.wide shall be placed overthe anchor or cap sheet inthe valley and shall be fas-tened 6 in. on centerwithin 1 in. of outsideedge with approved 12 ga.corrosion-resistant roofnails, or other approvedfasteners of compatiblemetals near the outsideedge of the valley metal.All joints shall be lapped aminimum of 6 in., ensur-ing water shedding capa-bi l i t ies and apply

approved plastic roof ce-ment between laps.

3.04 Flashing and Counter Flashings atWall Abutments:

NOTE #8 In no case shall top of verticalflashing be less than 2 in. abovetile surface.

NOTE #9 Flashing deck flange shall beprimed with ASTM D 41 As-phalt Primer.

NOTE #10 Head/apron flashing may be in-stalled on top of cap sheet in ac-cordance with 3.04.A.3.

A. Two-Ply System – Choose 1 or 2(see Drawings 5, 6, 7):

(RAS) No. 118


DRAWING 3TYPICAL VALLEY INSTALLATION

DRAWING 4VALLEY METAL STRIPPED IN

1. Install 4-in. x 5-in. “L”metal flush to base ofwalls with 4-in. flange onthe anchor/base sheet andfasten 6 in. on centerwithin 1 in. of outsideedge. All joints shall belapped a minimum of 4 in.,ensuring water sheddingcapabilities and apply ap-proved plastic roof ce-ment between laps. Fastenvertical flange of metalwithin 1 in. of outsideedge a minimum of 6 in.on center.

2. Install 4 in. x 5 in. “L”metal on the top ply andfastened 6 in. on centerwith 12 ga. corrosion re-sistant roof nails, or otherapproved fasteners ofcompatible metals within1 in. of outside edge of themetal. All joints shall belapped a minimum of 4 in.,ensuring water sheddingcapabilities and apply ap-proved plastic roof ce-ment between laps.Fasten vertical flange ofmetal within 1 in. of out-side edge a minimum of 6in. on center. Cap sheetshall be joined with a bedof plastic roof cement anda 4 in. strip of asphalt satu-rated cotton or fiber glassfabric. The fabric shall befully embedded in theplastic roofing cement.

3. Head/apron flashing maybe installed on top of capsheet. Ensure the deckflange conforms to thepitch of the roof and ex-tend minimum 4 in. ontodeck fasten according to3.04, A. 1. Seal along edgewith plastic roof cementand membrane.

4. Seal along top edge within2 in. of the top of the verti-cal flange, covering all

fastener penetrations withapproved plastic roof ce-ment and membrane.

5. When installing optionalcounter flashing, lap topflange of base flashingminimum 3 in. Fastenmetal within 1'' of the out-side edge a minimum of 6in. on center or set intoreglets (secured proper-ly) and thoroughly caulk.Lap joints minimum 4 in.ensuring water sheddingcapabilities and apply ap-proved plastic roof ce-ment/sealant betweenlaps.

B. Single-Ply System.

1. Install 4 in. x 5 in. “L”metal flush to base of sidewalls with 4 in. flangeover the single plyunderlayment and fasten 6inch on center near themetals edge. All jointsshall be lapped a mini-mum of 4 in., ensuring wa-ter shedding capabilitiesand apply approved plas-tic roof cement betweenlaps. Mechanically fastenvertical flange of metalwithin 1 in. of outsideedge a minimum of 6 in.on center near the edge ofthe metal.

2. Seal along top edge of ver-tical flange, covering allfastener penetrations withapproved plastic roof ce-ment and membrane.

3. All head/apron flashingshall be installed on top ofcap sheet. Ensure the deckflange conforms to thepitch of the roof and ex-tend minimum 4 in. ontodeck and fastened inaccordance with 3.04,B.1. Seal along edge with


(RAS) No. 118

plastic roof cement andmembrane.

4. When installing optionalcounter flashing, lap topflange of base flashing aminimum of 3 in. Fastenmetal within 1 in. of out-side edge a minimum of 6in. on center or set metalinto reglets and seal thor-

oughly. Lap joints a mini-mum of 4 in. ensuring wa-ter shedding capabilitiesand apply plastic roof ce-ment or sealant betweenthe laps.

3.05 Standard Curb Mounted Skylights,Chimneys, etc.

(RAS) No. 118


DRAWING 5WALL FLASHING DETAIL


(WALL FLASHING OVER CAP SHEET)

A. Curbs shall be a minimum 2 in. x6 in., and a minimum 2 in. aboveupper most adjacent finished tilesurface.

B. Flashing shall follow instruc-tions in 3.04 A or B in this Sys-tem.

NOTE #11 For self curbing or prefabricatedskylights, curb height shall bemin. 6 in. and min 2 in. aboveupper most adjacent finished tilesurface and installation shall bein accordance with skylightmanufacturer’s Product Ap-proval. For turbines and otherproduct approved accessories,refer to the accessory manufac-turer’s Product Approval.

3.06 Pipes, Stacks, Vents, etc. (See Draw-ings 8 & 9)

A. Apply approved plastic roof ce-ment around base of protrusionand on the bottom side of metalflanges sealing unit base flash-ing to the underlayment.

B. Nail all sides within 1 in. of out-side edge of base flashing 6 in.

on center. Make certain base isflush to deck.

NOTE #12 If pipes, vents and/or stacks areinstalled after finished cap sheethas been applied follow instruc-tions in 3.06 A & B. Cap sheetand metal flange shall bestripped in with at least the samecap sheet felt in use on this sys-tem. Stripping must extend atleast 4 in. beyond flange in all di-rections.

3.07 Counter Batten Installation:


(RAS) No. 118


(WALL FLASHING OVER CAP SHEET)

CAULKED BEAD

AT COUNTER

FLASHING

DRAWING 8LEAD STACK DETAIL

(OVER THE CAP SHEET)

(RAS) No. 118


NOTE # 13 Seal all underlayment penetra-tions with plastic roof cement.

A. The tile manufacturer must pos-sess a Product Approval forcounter batten tile system instal-lations. Counter battens are op-tional up to and including 7 in:12 in. pitch. Above 7:12 hori-zontal battens are required un-less restricted by product design(Tile without batten lugs). Whenutilizing horizontal battens com-ply with RAS 119.

B. Nominal 1 in. x 4 in. vertical bat-tens shall be applied at spacing notgreater than 24 in. on center. Se-cure at maximum spacing of 12in. on center with screws of suffi-cient length to penetrate the decksheathing by a minimum of 3/4 in.or to penetrate into a 1 in., orgreater, thickness of lumber notless than 1 in.Vertical battensshall be placed over the top cordof the roof trusses. Vertical bat-tens may vary in length. All bat-tens shall be installed withminimum #8 diameter corrosionresistant screw fasteners.

C. Horizontal battens shall be mini-mum nominal 1 in. x 4 in. or 2 in.x 2 in.

D. Fasten and secure maximum 24in. on center through vertical bat-

tens with screws of sufficientlength to penetrate the verticalbatten and sheathing a minimumof 3/4 in. or to penetrate into a 1 in.,or greater, thickness of lumber notless than 1 in.

E. On counter batten system, installa batten parallel to the outsideedge of the valley.

3.08 Tile Installation:

A. Eave Treatment - CHOOSEONE of the following:

NOTE # 14: All fastener penetrations shall besealed.

1. Prefabricated EPDM Syn-thetic Rubber - Install clo-sure strip along eave.Fasten each piece at 12 in.on center. (See Drawing10 all fastener penetra-tions shall be sealed withcompatible material.)

2. Metal Eave Closure - In-stall closure strip alongeave. Fasten a minimum12 in. on center with ap-proved fasteners. If metalis inclusive of drip edge,fasten 4 in. on center (seeDrawing 11).

3. Raised Fascia/WoodStarter Strip - when using a3/4 in. raised fascia, a nomi-nal 2 in. x 2 in. wood starterstrip must be installed be-hind fascia.

(aa) Install fascia boardapproximately 11/2

in. above roof deckor a nominal 2 in. x 2in. wood starter stripat roof edge (seeDrawing 12).

(bb) Install 8 in. taperedcant strip at eave be-hind fascia and/orstarter strip to sup-

DRAWING 9LEAD STACK DETAIL

(OVER THE BASE SHEET)

port metal flashing.Install a minimum 8in. wide anti-ponding metalflashing to ensurepositive drainageover fascia/starterstrip. Fasten topedge of flange ontoroof and fasten eaveedge to raised fasciadetai l with ap-proved fastener 4 in.on center.

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

5. Storm Clips. Storm clipsshall be required at thefirst course of tile. The useof other alternatives in-cluding an adhesive is anacceptable means for fas-tening the first course oftile as long as it is part ofan approved roofing sys-tem and meet the require-ments of Chapter 16 of theFlorida Building Code,Building for wind resis-tance.

6. 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 thespacing of not lessthan one weepholeper tile.

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

NOTE #15 Tile shall be attached to resist thedesign pressures for the build-ing. See Chapter 16 of theFlorida Building Code, Building(High-Veloci ty HurricaneZones) and RAS 127. See tilemanufacturer’s Product Ap-proval for attachment resistancevalues, which must exceed therequired calculated design pres-sures of the structure.

3.09 Valleys - CHOOSE ONE of the fol-lowing:

A. Standard Roll Valley


(RAS) No. 118

DRAWING 10EAVE TILE DETAIL

(NAIL-ON EPDM EAVE ENCLOSURE)

(RAS) No. 118


1. Closed Valley - Miter tileto meet at center of valley.

2. Open Valley Chalk a lineminimum 2 in. on bothsides of valley center.Place bed of mortar alongoutside edge of chalk

lines. Miter tile to formstraight border and pointmortar to finish.

B. Preformed Metal Without Re-turns

1. Closed Valley - Miter tileto form straight border oneither side of water di-verter.

2. Open Valley - Miter tile toform straight border on ei-ther side of two water di-verters.

3.10 Hip Starter - CHOOSE ONEof the following:

A. Prefabricated hip starter.

1. Miter tile as hip starter tomatch eave lines.

B. Use standard hip tiles as starter.

3.11 Hip and Ridge Nailer Boards or Pre-formed Metal Channel (see Drawing13) - 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 requiredand attached in compliance withChapter 16 (High-Velocity Hur-ricane Zones) of the FloridaBuilding Code, Building.

B. Wood nailer boards shall be se-cured with hot dipped zinc coatedgalvanized steel straps of a mini-mum thickness of 1/8 in. by 1-1/4 in.

METAL ENCLOSURE -

NAIL 12” O.C. & SEAL

PENETRATION

BATTEN (OPTIONAL)


(NAIL-ON METAL ENCLOSURE)

ANTI-PONDING METAL-

NAIL 4” O.C. - SEAL

PENETRATION

BATTEN (OPTIONAL)


(NAIL-ON ANTIPONDING METAL)

wide. The galvanized steel strapsshall be installed at a maximumspacing of 12 in. on center alongthe length of the ridge nailerboards. Steel straps shall be bentto fit over the ridge nailer boards,and shall be secured to the sheath-ing with a minimum of six #6 - #8corrosion resistant screws perstrap, at a maximum spacing of 4in. on center.

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 over


(RAS) No. 118

DRAWING 13RIDGE BLOCKING DETAIL

For SI: 1 inch = 25.4

1/8: x 1-1/4” HOT DIPPED

ZINC COATED

GALVANIZED METAL

STRAP BENT

20 GAGE HOT DIPPED

ZINC COATED

GALVANIZED x 1” STEEL

STRAPS SPACED 24” O.C.

FASTENED IN ACCORDANCE

WITH RAS 118 SECTION 3.11(B)

WOOD NAILER SET IN A

CONTINUOUS BED OF APPROVED

ADHESIVE

(RAS) No. 118


nailer board andseal to tile surfaceper membrane man-ufacturer’s recom-mendation.

(bb) Install hip and ridgetiles with corrosionresistant approvednails or screws and ofsufficient length topenetrate a minimumof 3/4 in. into nailerboard lapping tile aminimum of 2 in.(Approved adhesive,in lieu of nails orscrews, is permittedwhen using Details 2and 3. When usingadhesive, hip andridge tiles shall be in-stalled in accordancewith the adhesivem a n u f a c t u r e r ’ sProduct Approval.)

(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 mor-tar does not pro-trude in center ofhip or ridge junc-t ion. Approxi-mately 1 inch (25mm) of field tileshall extend beyondbed of mortar.

(bb) Install hip and ridgetiles with approvedcorrosion resistanttile fastener of suffi-cient length to pene-trate a minimum of3/4 in. into nailerboard. (Approved

adhesive, in lieu ofnails or screws, ispermitted when us-ing Details 2 and 3.When using adhe-sive, hip and ridgetiles shall be installedin accordance withthe adhesive manu-facturer’s ProductApproval.)

(cc) Point mortar to fin-ish surface.

3.12 Rake/Gable-Choose one of the follow-ing:

A. Rake/Gable Tile:

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

2. Fasten each rake tile witha minimum of two 10Dnails of sufficient lengthto penetrate the framing aminimum of 3/4 in.

3. Abut each succeedingrake tile to the nose of thefield tile above and main-tain a constant headlap.

B. Mortar Finish:

1. Place mortar bed alongroof edge.

.

2. Point smooth to a straightedge finish.

3.13 Wall Abutments

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

NOTE #17 It may be necessary to removethe lugs from the field tile at wallflashing for proper positioningof cut field tiles. For tiles in-stalled at headwalls, tile shall beinstalled with approved roof tileadhesive. Fill void at headwallwith mortar and point to finish.

3.14 Plumbing Stacks

A. Cut tiles to fit close to plumbingstack. Fill void with mortar andpoint to finish.


(RAS) No. 118

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ROOFING APPLICATION STANDARD (RAS) No. 118 …...TAS 114, Appendix E, Section 2 (ASTM G 85), for salt spray for 1,000 hours. Tile fasteners used in coastal building zones, as define