Community College of Allegheny County Pittsburgh, Pennsylvania
2022 Library Roofing Project
6. Remove temporary connection at beginning of next workday by cutting membrane evenly alo ng edge of existing roof system. Remove” deadman” insulation fillers.
B.
Alternate Tie-in: 1.
Remove embedded gravel/debris from top ply of felt along termination. a. Width: 24 inches
2.
Remove dirt and debris from tie-in area. a. Width: 24 inches
3. Adhere 12- and 18-inch-wide ply sheets from exposed deck to existing roofing witha continuous 1/16 thick application of tie-off mastic. Glaze cut-off with surfacing mastic. Extend 18-inch wide felt 3 inches either side 12-inch felt. 4. Install “deadman” insulation filler at insulation staggers. 5. Extend new roofing membrane at least 24 inches onto prepared area of adjacent existing roofing. 6. Attach membrane ply lap over underlying membrane with adhesive and/or membrane fasteners and seam plates. 7. Apply spray foam over leading edge of tie-in ply lap and exposed membrane fasteners and seam plates. 8. Remove temporary connection at beginning of next workday by cutting membrane evenly along edge of existing roof system. Remove” deadman” insulation fillers.
3.11
FIELD QUALITY CONTROL
A. Final Roof Inspection: Arrange for roofing system manufacturer’s technical personnel to inspect roofing installation on completion.
3.12
PROTECTING AND CLEANING
A. Protect roofing membrane from damage and wear during remainder of construction period. When remaining construction will not affect or endanger roofing, inspect roofing for deterioration and damage, describing its nature and extent in a written report, with copies to Tremco field advisor. B. Prior to performing work on a completed roof area that may cause damage the new roof, the roofing membrane and flashing shall be protected from physical damage. Proper and adequate protection includes installing a slip-sheet in the work area overlaid with plywood or OSB Board in order to dissipate the effects of traffic on the finished roof surface and to prevent impact damage to the system caused by dropped tools and or equipment. If damage does occur to the roof system, it must be immediately repaired in order to preserve the integrity of the roof insulation. C. Correct deficiencies in or remove roofing that does not comply with requirements, repair substrates, reinstall roofing, and repair base flashings to a condition free of damage and deterioration at the time of Substantial Completion and according to warranty requirements.
07540-15 THERMOPLASTIC MEMBRANE ROOFING
February 2022
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