Specifications include, but are not limited to: In general the work consists of Remove approximately 17,000 square feet of roof material including insulation. Install new flat roof system to be fully adhered Ethylene-Propylene-Diene-Monomer (EPDM) membrane, 60 mils thick with low rise foam adhering polyisocyanurate insulation over existing tectum deck. The complete system shall have an average R-value of R-25 with a base layer of 2”. Replace roof drains. Provide new flashing, pipe boots, counter-flashing, gutters (where applicable) downspouts and other roof accessories as required to achieve manufacturers 20-year No-Dollar-Limit warranty. In 2007 the 55- year-old roof was replaced by removal and replacement of the existing wet areas within the system, increasing the R-value and applying a silicone membrane over the insulation to achieve an R-value of 21. Essentially a silicone over spray foam fix that was designed to extend the life of the existing roofing system at the time. This project is being requested to preempt failure of the roof and avoid catastrophic failure.
