Community College of Allegheny County Pittsburgh, Pennsylvania
2022 Library Roofing Project
c.
Perform and evaluate weld tests each time robotic welding machine is allowed to cool.
12.
TremPly KEE FB Membrane End Laps. a.
Abut end laps. Gap width between membrane sheets shall not exceed 1/8 inch. Install 6-inch-wide cover strip over end lap. Cut cover strip corners round.Heat-weld cover strip centered over end lap.
b.
13.
Heat-weld a 4-inch round field cut KEE flashing membrane (unreinforced) centered over each T-joint. Install TremPly KEE (non-fleece backed) flashing details per Tremco Inc. specifications, recommendations, and detail drawings. a. All flashings shall be installed as shown on the detail drawings and per Tremco Inc. standards. All membrane flashings shall be installed concurrently with the roof membrane as the project progresses.
14.
b.
Membrane base flashings shall be fully adhered (45 mil) TremPly KEE membrane. The flashing membrane shall be fully adhered to a dry, smooth solvent- resistant and compatible substrate using TremPly KEE LV Bonding Adhesive. Surfaces to receive adhesive must be clean, dry, and free from oil, grease, or other contaminants
c.
d. Position KEE Flashing membrane in intended location and fold back. Apply KEE LV Bonding Adhesive in full coverage to the back side of the flashing membrane at a rate of 100 square feet per gallon and to the vertical substrate at a rate of 90 square feet per gallon ensuring 100 percent coverage (approximately 50 square feet per gallon coverage). Allow solvents to dissipate so the adhesive becomes sticky, but not stringy, to the touch. e. Do not allow Bonding Adhesive to contaminate membrane and flashing lap areas. Heat-weld overlap seams of flashing and field membrane. f. Install TremFlash (TF) Tape between wall and top edge of flashing membrane. Secure the top of the installed flashing membrane with a termination bar fastened 6 inches o.c. and cover with metal counterflashing. g. Flash all pipes with TremPly KEE Pre-Fabricated Flashing Boots where possible. Field fabricate pipe flashing with TremPly KEE non-reinforced membrane per standard Tremco Roofing Systems details when a pre- molded flashing is not feasible.
h.
Fabricate all metal flashings with flanges using TremPly KEE Membrane Coated Metal. Heat-weld a 5-inch wide KEE cover strip to flashing membrane and coated metal flange.
i. j.
Install new curb details.
Heat-weld all flashing laps with approved welding equipment.
15. Install all sheet metal details per specifications, WTI, SMACNA and Tremco Inc. requirements and standards. a. The minimum requirements for sheet metal work are commercial quality Kynar Pre-Finished Metal (excluding Membrane Coated Metal) unless specified otherwise. Fabrication shall comply with Tremco Inc., SMACNA and NRCA recommendations.
01010-8 SUMMARY OF WORK .
February 2022
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