Sprayed_Polyurethane_Foam_Roofing_System_Over_Mod_Bit_Roof.pdf

This document is a detailed guide specification for a Sprayed Polyurethane Foam (SPF) Roofing System, specifically targeting installation over a modified bitumen roof surface, with guidance potentially for the City of Edinburg, Texas. The specification outlines comprehensive requirements for contractors and manufacturers seeking to apply a polyurethane foam roofing system, including strict qualifications for both the roofing contractor and the material manufacturer. Contractors must have a minimum of ten years of experience in polyurethane foam roofing applications, have performed at least five similar installations, and carry required general liability insurance, while manufacturers must have been in business for at least ten years and maintain a minimum of $5,000,000 in product liability insurance.

The specification provides extremely detailed technical requirements covering surface preparation, environmental conditions for application, foam application techniques, and protective coating procedures. Key technical specifications include applying polyurethane foam to achieve a minimum thickness of 2.0 inches, implementing a three-pass protective coating system using EnviroShield III acrylic elastomer in light gray, white, and white colors, and broadcasting bright white roofing granules into the wet topcoat. The document culminates with a requirement for a Twenty Year NDL (No Dollar Limit) System Labor and Material Warranty, underscoring the long-term performance expectations for this roofing system. The comprehensive nature of the specification suggests a rigorous approach to ensuring high-quality, durable roofing installation with specific performance and application standards.