Specifications include, but are not limited to: New Roof: 1) Remove existing gravel built-up roof and insulation to the metal deck. Repair or replace deteriorated and damaged metal deck. Follow manufacturer guidelines for removal and replacement of metal deck. 2) Install a new gravel surface 4 ply roof membrane, 1/2” gypsum board, and insulation as specified. The insulation shall consist of one (1) layer of 1.5” polyisocyanurate insulation set in Type IV and one (1) layer of 2” polyisocyanurate insulation mechanically attached. 3) Install new 24 ga. prefinished coping, counterflashings, downspouts, conductor heads, etc., as specified. Color selected by Owner. 4) Installation shall comply with project documents and in accordance with NRCA, SMACNA, ANSI/SPRI, and manufacturer’s guidelines. Where discrepancies exist, the most stringent method shall apply. 5) Furnish Manufacturer’s 20 year NDL Roof System Warranty. 6) Furnish Manufacturer’s 20 year Metal Finish Warranty.