6,100ft² Derbigum Two Ply Modified – Lancaster, PA

Remove and dispose of the existing PVC roofing, gravel surfaced built up roofing, and insulation down to the existing metal deck. Remove and replace deteriorated metal decking Loose lay one layer of 3-1/2″ polyisocyanurate board insulation over the entire roof area. Mechanically fasten 1/4” Dens Deck Prime cover board over the entire roof area. Install a 2 ply modified bitumen roof system in cold adhesive over the new gypsum cover board. Flash all curbs, walls and roof penetrations in accordance with the manufacturer’s recommendations. Build a wooden divider curb to separate new roof system from the existing adjacent PVC roofing system. Install walkway pads in owner directed locations. Custom fabricate and install new 24 gauge pre-finished galvanized edge metal, conductor heads, and downspouts. Provide a manufacturer’s 20 year total system warranty.