Tear off of existing roof on 10th floor, 12tha nd 5th floor, and Install 20psi polyisocyanurate tapered insulation system adhered at a minimum rate of 12" o.c ribbon spacing or as required by Derbigum installation. Install 1/4" densdeck, adhered to the tapered insulation based on debigum technical installation requirements. Install one layer of Derbi-base Ulta SA as a base layer. Install one layer of Derbigum Color GP FE granulated cap torch applied.
1424 4TH AVE