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Home My WebLink About7-11 SW at Wellborn 07 . ~ SARNAFIL SPECIFIC.A TIONS .1 . ~ ' ' 1W UIIIMllrlJ_ . :mE SPBCIPICA1'ION .ItI' . . . C'rIOR ' . PART I \ GENERAL CONDITIONS 1.01 DESCRIPTION A.. SCOPE: To provide,an integral roofing system inclusive of all flashings, roofing membrane, and other items required to produce a weatherproof, watertight covering. B. RELATED WORK: Roof deck may be constructed of plywood, concrete, precast panels, steel deck, or other approved structural surfaces, insulated or otherwise. -' . C. SURFACE PREPARATION: . The roofing contractor shall be responsible for providing proper surfaces to receive roofing and flashing. The roofing subcontractor shall notify the General Contractor in writing of any and all defects in the receiving surfaces, and work shall not proceed until such defects have been corrected. At commencement of roofing application, the entire area to be roofed shall be inspected by the roofing ~.'b(.cntractor to determine that it is free of debris and ot,he:r.wise acceptable for roofing. l~02 ~~l~-:':rTY ASSURANCE It:. .Applicators shall be factory-trained and qualified personnel. E~ Roofing contractor and other supervisory personnel shall familiari:ce themselves with surface requirements and installation~rocedures prior to commencement of work. PRODUCT DELIVERY AND STORAGE A~ All products delivered to job shall be in original unopened conta.iners... B.. Sarnafil membrane rolls shall be stored lying down, fully protected from moisture. c. Sarnacol adhesives shall be stored at temperatures above " 00 F (+ 50 C.) JOB CONDITIONS . A. Sarnafil materials may be installed under certain adverse weather conditions (temperature, moisture, humidity, but consult.tion with the manufacturer is advised since production costs may be affected and certain precautions recommended. . B. Protection of completed membrane is indicated where mechanical damage may occur both during and after construction. 1.05 ~RANn:. Roofing contractor &ball furn1ah a Sarnafll lO-year material and labor warranty. II - INSTALLATION DECK PREPARATION The deck thickness shall be a .in~ 2- lumber and 5/8" for plywood. Plywood shall be exterior glue grade. The deck ahall conform to Factory Mutual's requirements for Class I impreqnated lumber decks. All joints of plywood shall be taped using self- adhering fiberglass tape. MEMBRANE A. INSPECTION . Applicator shall examine surface scheduled to receive Sarnafil membrane for defects such as excessive surface roughness, contaminated surfaces, .tr~turally unsound substrate., etc., that will adversely affeet e.ecution and quali ty of work. Work shall not COllll'8eRee until all defects are remedied. . B. PREPARATION , . Surfaces scheduled to receive Sarnafil .ust be free of physical c6ntact with any bituainous surfaces, clean, and smooth. C. APPLICATION OF AD~ESIVE AND MEMBRANE i. Sarnacol 2170 solvent base adhesive: Surface to receive Sarnafil 621-410 gray shall be primed with Sarnacol 2170 and allowed to dry. Adhesive shall be applied to underside of sheet and allowed to become tacky. Adhesive shall not be applied to lap area. Sheet shall be positioned so as to lap next sheet as required (refer to Welding of Laps section bel~w) and make firm contact with primed surface. ii. Sarnacol ~12l aqueous emulsion adhesive: (May be used in lieu of Sarnacol 2170 on water absorbent surfaces only when outside nighttime temperatures are above freezing.) Sarnacol 2121 shall be applied to substrate (refer to list of adhesive application rates for various substrates.) Sarnafil membrane 621-410 gray shall be laid into wet adhesive and rolled with approved roller. Adhesive shall not be applied in lap areas. . . l ) r SIKA SPECIFICATIONS D. WELDING OF LAPS All lap joints shall be -.de by hot air we141nq with approved laectrie hot air welding equ1~ft~. When band welding, lIIeJDbran.e shall be overlapped 4". When JlleelUae welding, membrane shall be overlapped 3-. Roofing membrane and accessory fflaterials shall be manufactured by: 5tka AG, Zurich, Sw1tzerland, or &ka Corporation, Lyndhurst, New Jersey, U.S.A" or Sika Canada Inc., Pointe Claire, Quebec, Canada. E) Extra Strtpping/ Membrane Flaehinga: B. QUALI'1'Y CONTROL All welds shall be tested for continuity by ruDRing a screwdriver along joint after weld ha. cooled. Periodic checJtinq of cro.. aec.toa cuts at .e... rec~nded. Any d1acoatiauiUe. sball be rewelded. Pos1tive evi4eAce oz 900d welding is a characteristic uninterrupted extrusion of melted blaak ..tarial from the joint. Roofing system shaH be: Ptease ~ proper roofing system as app6M:abte for your ~ (looIefy lald, fuMy IIdMIwd, ~Iy '11111..0, trwefted, etc.). See ..tnstaUation" (Section 4) for ~.' SingJe-pty roofing ~ INItI be po;,wter..fabric fIlinMtced, Sikaptsn PVC 12G ,or Sikaptan PVC 12GS as appijcaD(e). tncckneu 51 mMs, (1.3 mm). UV-stabi.ity over 10,000 hours (ASTM E-238f&4T, xenon-teet), shrinkage O.~ (ASTM 0-12(4), water vapor ~;ty ~ glm2/24 hi (ASTM E..e6A), tensile aU'ength 2,59f l-'~:.i 180 N/5 em, 125 lbIin. (ASnA 0-412). elongation 21ft (AS ftt r 12), shore A harcJnes! 85 (AS'1 M 0-2240). flame rating <25 (ftLIM '.-1(8), color an.H be IIgnt gray. PVC coated metal $tlilll be Sii:aM&tai, ~ and ~ted. and COUld on one aide wtth a Sikaptan membran<", CQor shall be Itght gray. AcJhestve shall be Stka PVC Contact Adhestve C-733. P ART I I 1: - MANUP'AC'rtJRERS 3.01 MEMBRANE Sarnafil 6-21-410 9ray, 48 mil fiberel... reinforced P.V.C. roof JIleIabraae, a. aanufactllred by S&.ruf!l (U...) lAC. 3.02 ADHESIVE Sarnaeol 2170 adhesive, solvent base contact adhesive. (1 1/2 gallon/square) Sarnacol 2121 aqueous emulsion adhesive. (1 1/2 gallon/square) Joint sealant shall be Sika PVC Joint Sealant. Both manufactured by Sarnafil (U.S.) Inc. 3.03 SEALANTS AND PITCH POCKET FILLERS Cleaner shall be Sika Calma Cleaner. Caulking shall be one-component polyurethane, Sikafle,.. " The following sealant$ are approved for use in Sarnafil .ystems: A. Monoelastomeric, one part acrylic, a. manufactured by Tr8JllCO, Inc. . Mechanical Fasteners: Stress plates shall be Fabco Insulfixx. N, Insulfixx S. Insulfixx p. or approved equal. Screws shall be Fabco Insulfixx (or Confixx., or Toglfixx', as appficable). or approved equal, F) Welding Tec~ B. Silpruf, one part silicone sealant, .. manufactured by General Electric Co., or equal by Dew Corning Co. The following pitch pocket filler is approved for use in Sarnafil Systems: A. GACO UWM-285, two part urethane, as manufactured by Gates Engineering Co., Inc. All Sika membrane installations shall be executed by Sika-authorized Roofing Contractors only. A) ,,~....., Woftc Note: Sikaplan PVC 12G/12GS~oofing membranes are not cOmpatible with asphalt or coal tar pitch-ba8ed materials (see General Remarks, "Misceflaneous" (Section 10) 'for deCMs). Examine surfaces to receivt membrane and ensure that they are free of conditions which wtU ad~y offset the perfO",WtnC8 0' the membrane. Work shall not proceed unti I defects have been corrected. Substrate ahaJl be dry, cktan, smooth, free of sharp edges, 100M and foraegn materi_, oil and grease, aaph8tt/coat tar pitch, etc. ShouJd job conditions or specified data deviate from manufacturer's instructions, consult with architect prior to start of work. For specific information on your particular Sikaplan single-ply roofing installation, contact Sika's Flexible Waterproofing Division in Dalfas, Texas at 214-661-3610. In Canada please contact 519 894 1560. ~=icafly Systems: (See "Design Details': Section 3), Use Sikaplan PVC 12G membrane. Use Sikaplan PVC 12GS membrane for installations on all highrise buildings, on irregularly shaped buildings, and on buildings exposed to extreme wind load and/or wind flow. Posrtion and unroll membrane. Membrane shall be placed flush with roof perimeter, all vertical surfaces, walls, all curbs and cants, etc. Use 5 In. (12'/2 em) fastener spacing (around roof perimeter' and ail roof projections). Mark spacing distance on ftl9nbrane edges and place stress plates in posrtion so that the distaAci cetween membrane edge and the edge of the stress plate is a min.",i.m of '4 in. (3 mm). Fasten serews securety throtJgt1 insulation into structural deck. Use either Fabco Straight Shooter- or power drill equipped with proper inserts. Overlap next roU a minimum of 2 in. (5 em) ~ streas plstes for hand-weld operation, a minimum of 3 in. (7'12 cm) beyond streu pfates for f1\8Cf'rine..weld operation. Follow procedUNS d81cribed aboYe. Wekj 888m as outlined in F in this section. Overlap next rotl and follow procedures described above. Install extra stripping as shown in "Design Details" (Section 3) and as outlined in E In this section. Weld all inside and outside comers, etc., as outlined in Fin thil section. Install membrane flashings at all penetrations, alc units, vem stacks, drains, skylights, etc., as shown in "Design Details" (Section 3) and outlined in E in this section. Check alt seams as outlined in F in this section. . ~ Install extra stripping/membrane flashings at roof perimEtter and all penetrations, alc units, vent stacks. drains, skylights, etc., in a way that wind can not get underneath tr.e membrane, as shown in "Design Details" (Section 3). Use Sikaplan PVC 12G, Sikaplan PVC 12GS, or Sikaplan PVC 120 membrane. Note: Uae Sikaplan PVC 120 for vent staats, drains, etc. Cut mem- brane stripping, sleeves, collars, etc., accordingly to detaW dimensions. Apply Sika PVC Contact Adheetve C-733 to both substrate and membrane usjng a so/v.enHeefstant paint roller or paint brush. Allow adhesive to get tacky.. . drying time increases in cold weather and under conditions of excessive humidity. Place membrane in position and press it solidly to substrate using rubber roller from your Leister heat-weldtftg equipment. Avoid air pockets. Be sure you place membrane in an exact position the first time... readjusting is impossible. Extend extra stripping/memhrane flashings a minimum of 3 in. (7% cm) onto the horizontal roof area. Weld seams as outlined in F in this section. See data sheet on Sika PVC Contact Adhesive C-733 for more details. For specific information on your particular 5ii<aplan single-ply roofing installation, contact Sika's Flexible WaterprQofing..E?ivi"," in 0alt1E, Texas at 214-661-3610. In Canada please contact 519--894-1580. -~ ~-J Use Leister hot-air welding equipment only. Use Lafster Triac for hand-weld operation, Leister Variant for machine- weld operation. C :::::t 2 .. ' ... . 0 IIIID - >.... t- _'" :II e IE.... IE D 0 a. :.= ... 1E2 IE 00 e u- .. a. .. - D> -. ",2- oeD .e ... 11I)( "'" !III 2ZIE o...e .... I -:::::tt- :::::t . .0. -2 - t- >. - . General Requirements: The operation of the welding equipment requires specia4 skills. Sjka Corr>oration provides a complete program to train the Roofing Contractor in the proper techniques of hand welding and machine welding. Opef..... of haM Mid l.. 1H8c:: · Set Triac for the maximum temperature and allow to warm up for a minimum of 2 min. · Insert 11h-in. (40 mm) nozzle into 2-in. (5 em) seam end taok wefd 3O-in. (75 cm) on center. . Insert 1'/z-;n (40 mm) nozzie into 2-in (5 cm) seam and weld back eene to avoid exit of hot air during final welding procedure. · Insert 11h-in. (40 mm) nozzle into 2-in. (5 cm) seam by tuminggun to a 45 degree ang! ~"d move gun gently forward. The stUcone hand roller follows 11 " "ozzle by applying slight pressure. . l Jse 31.-in. (20 r. m) nozzlo for welding corners, pipe sleeves, etc. Operation of Aut.oroatic Leister Variant: · Sot Variant for the maxi~m temperature and allow to warm up for 2 min. · Set speed for the maximum cetting and insert nozzle into seam. A proper welding performance is achieved when the dark-gray underside material of the membrane begins to flow and starts squeezing beyond the seam €:dge. Smoke development also ~ . proper wekiiAg ~. · If machine produr.e~ improper scam welding, reduce speed accordingly. · tf the machine causae burning ot membrane, reduce heat accordingly. Checking welded M-atmS; An uninterrupted bead of melted inaterial from the dark--gray under- side of the membrane must be v;~ible. In addition to that, run a screwdriver along the scam to check for not homogeneously welded spots. See data sheets on Leister Triac and Leister Variant for more details. For specific information on your particular Sikaplan single-ply roofing installation, contact Sika's Flexible Waterproofing Division in Dallas, Texas at 214-661-3610. In Canada please contact 519-894-1560. .101 NO. LOCATION SINGLE-PLY ROOF SPEC,- . i)' IFICATIONS A3