CCAC West Hills Campus WHC Main Roof Project WHC Main Roof Project
Date of Issue (05/26/2022)
1. Tapered Insulation System for Flat Roof Deck: Install insulation as follows: a. Minimum total thickness of Continuous Insulation: 2 inches. b. Minimum Continuous Insulation R-value: Not less than 30. E. Insulation Drain Sumps: Tapered insulation sumps, not less than 2 by 2 ft. (600 by 600 mm), sloped to roof drain; sump to maximum depth of not more than 1 inch (25 mm) less than the Project-stipulated continuous insulation thickness based upon code requirements. F. Trim surface of insulation where necessary at roof drains so completed surface is flush and does not restrict flow of water. G. Install insulation with long joints of insulation in a continuous straight line with end joints staggered between rows, abutting edges and ends between boards. Fill gaps exceeding 1/4 inch (6 mm) with insulation. 1. Cut and fit insulation within 1/4 inch (6 mm) of nailers, projections, and penetrations. H. Mechanically Fastened Insulation: Install each layer of insulation and secure to deck using mechanical fasteners specifically designed and sized for fastening specified board-type roof insulation to deck type. 1. Fasten insulation according to requirements in FM Global's "RoofNav" for specified Windstorm Resistance Classification. 2. Fasten insulation to resist uplift pressure at corners, perimeter, and field of roof.
3.5
ADHERED MEMBRANE ROOFING INSTALLATION
A. Adhere membrane roofing over area to receive roofing and install according to membrane roofing system manufacturer's written instructions. B. Start installation of membrane roofing in presence of membrane roofing system manufacturer's technical personnel. C. Accurately align membrane roofing and maintain uniform side and end laps of minimum dimensions required by manufacturer. Stagger end laps. D. Solvent-Based Bonding Adhesive: Apply to substrate and underside of membrane roofing at rate required by manufacturer and allow adhesive to become tacky before installing membrane roofing; do not allow adhesive to fully dry. Roll membrane into adhesive. Do not apply adhesive to splice area of membrane. E. In addition to adhering, mechanically fasten membrane roofing securely at terminations, penetrations, and perimeter of roofing. F. Apply membrane roofing with side laps shingled with slope of roof deck where possible.
075419 - Page 12 of 14 POLYVINYL-CHLORIDE (PVC/TPA) ROOFING
Made with FlippingBook - Online magazine maker