SPEC WRITER NOTE: The code requires roof coverings on fully adhered or mechanically fastened nonballasted roofs to be tested according to UL 580 or UL 1897. Comply with // UL 580 // UL 1897 // for uplift resistance. Do not allow membrane and flashing to contact surfaces contaminated with asphalt, coal tar, oil, grease, or other substances incompatible with PVC. ROOFING INSTALLATION Install membrane perpendicular to long dimension of insulation boards. Begin membrane installation at roof low point and work towards high point. Lap membrane shingled in water flow direction. Position membrane free of buckles and wrinkles. Roll membrane out; inspect for defects as membrane is unrolled. Remove defective areas. Allow 30 minutes for membrane to relax before proceeding. Lap edges and ends minimum 50 mm (2 inches). Heat weld or solvent weld laps. pressure to develop full adhesion with minimum seam strength according to ASTM D4434/D4434M. seams to ensure continuous adhesion and correct defects. Finish seam beveled bead of sealant. Finish seams same day as membrane is installed. Anchor membrane perimeter to roof deck and parapet wall as indicated on drawings. Membrane Perimeter Anchorage: Install batten with fasteners at perimeter of each roof area, curb flashing, expansion joints and similar penetrations on top of roof membrane as indicated on drawings. Space fasteners maximum 300 mm (12 inches) on center, starting 25 mm (1 inch) from ends. When battens are cut round corners and eliminate sharp corners. Stop batten where batten interferes with drainage. Space ends of batten 150 mm (6 inch) apart. batten with 150 mm (6 inch) wide roof membrane strip; heat or solvent weld to roofing membrane and seal edges. At // gravel stops, // fasciacants, // turn roofing membrane down over front edge of blocking or nailer. Secure roofing membrane to
SPEC WRITER NOTE: The code requires roof coverings on fully adhered or mechanically fastened nonballasted roofs to be tested according to UL 580 or UL 1897. Comply with // UL 580 // UL 1897 // for uplift resistance. Do not allow membrane and flashing to contact surfaces contaminated with asphalt, coal tar, oil, grease, or other substances incompatible with PVC. ROOFING INSTALLATION Install membrane perpendicular to long dimension of insulation boards. Begin membrane installation at roof low point and work towards high point. Lap membrane shingled in water flow direction. Position membrane free of buckles and wrinkles. Roll membrane out; inspect for defects as membrane is unrolled. Remove defective areas. Allow 30 minutes for membrane to relax before proceeding. Lap edges and ends minimum 50 mm (2 inches). Heat weld or solvent weld laps. pressure to develop full adhesion with minimum seam strength according to ASTM D4434/D4434M. seams to ensure continuous adhesion and correct defects. Finish seam beveled bead of sealant. Finish seams same day as membrane is installed. Anchor membrane perimeter to roof deck and parapet wall as indicated on drawings. Membrane Perimeter Anchorage: Install batten with fasteners at perimeter of each roof area, curb flashing, expansion joints and similar penetrations on top of roof membrane as indicated on drawings. Space fasteners maximum 300 mm (12 inches) on center, starting 25 mm (1 inch) from ends. When battens are cut round corners and eliminate sharp corners. Stop batten where batten interferes with drainage. Space ends of batten 150 mm (6 inch) apart. batten with 150 mm (6 inch) wide roof membrane strip; heat or solvent weld to roofing membrane and seal edges. At // gravel stops, // fasciacants, // turn roofing membrane down over front edge of blocking or nailer. Secure roofing membrane to
VA%2007%2054%2019.docx