Isaac Middle School Roof Improvements

1. Remove existing roofing assembly down to light weight concrete or structural deck. 2. Install polyisocyanurate insulation (1.5-inch minimum.) per plans. See roof plans for depth of insulation. 3. Fully adhere ½” asphalt coated wood fiberboard insulation (recovery board) in Type IV asphalt. 4. Install factory tapered crickets as required to create positive slope to drains. 5. Install perlite cant strips at all 90 degree angles. 6. In field, fully adhere one ply of SBS modified smooth surfaced membrane with specified tensile and tear strengths in Type IV asphalt. 7. In field, fully adhere one ply of modified surfacing membrane with specified tensile and tear strengths in Type IV asphalt. 8. At all base flashings, fully adhere one ply of modified smooth surfaced membrane with specified tensile and tear strengths in Type IV asphalt. 9. Over smooth surfaced base flashing ply, fully adhere one ply of thermoplastic membrane in low rise adhesive/Type IV asphalt/bonding adhesive. 10. Strip in base flashing membrane to field surfacing membrane with asphalt mastic, reinforced with fiberglass mesh; broadcast granules into top layer of asphalt mastic. 11. Install new metal flashings, including but not limited to drip edge, copings, counter flashings, slip flashings, scuppers, lead jacks, lead at drains, and pitch pans/covers. 12. Properly support all conduit, gas lines and any other roof top lines to complete the roof with UV resistant and galvanized supports blocking. 13. Spray apply acrylic white coating to surfaced membrane, base flashings, pipe penetrations, and miscellaneous areas; application must be applied in two coats in cross-hatch manner.

Division 07 -

Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.