CCAC West Hills Campus WHC Main Roof Project WHC Main Roof Project
Date of Issue (05/26/2022)
G. Welded Seams: Clean seam areas, overlap membrane roofing, and hot-air weld side and end laps of membrane roofing and sheet flashings according to manufacturer's written instructions to ensure a watertight seam installation. 1. Test lap edges with probe to verify seam weld continuity. Apply lap sealant to seal cut edges of sheet membrane. 2. Verify field strength of seams a minimum of twice daily and repair seam sample areas. 3. Repair tears, voids, and lapped seams in roofing that does not comply with requirements. H. Spread sealant bed over deck drain flange at roof drains and securely seal membrane roofing in place with clamping ring. 3.6 BASE FLASHING INSTALLATION A. Install sheet flashings and preformed flashing accessories and adhere to substrates according to membrane roofing system manufacturer's written instructions. B. Apply bonding adhesive to substrate and underside of sheet flashing at required rate and allow to partially dry. Do not apply to seam area of flashing. C. Flash penetrations and field-formed inside and outside corners with cured or uncured sheet flashing. D. Clean seam areas, overlap, and firmly roll sheet flashings into the adhesive. Hot-air weld side and end laps to ensure a watertight seam installation. E. Seal top termination of base flashing with a metal termination bar and a continuous bead of joint sealant. 3.7 WALKWAY INSTALLATION A. Flexible Walkways: Install walkway products in locations indicated. Heat weld to substrate or adhere walkway products to substrate with compatible adhesive according to roofing system manufacturer's written instructions.
3.8
FIELD QUALITY CONTROL
A. Roofing Inspector: Owner will engage a qualified roofing inspector to perform roof tests and inspections and to prepare test reports. 1. Engage a qualified roofing inspector for a minimum of 10 full-time days on site to perform roof tests and inspections and to prepare start up, interim, and final reports. Roofing Inspector's quality assurance inspections shall comply with applicable criteria established in NRCA's "Quality Control and Quality-assurance Guidelines for the Application of Membrane Roofing Systems." B. Final Roof Inspection: Arrange for roofing system manufacturer's technical personnel to inspect roofing installation on completion.
075419 - Page 13 of 14 POLYVINYL-CHLORIDE (PVC/TPA) ROOFING
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