Special Considerations for Polyurea Foam Roof Coating Application
Polyurea foam roof coatings are the first component of spray polyurethane foam-based (SPF) roofs, a popular commercial roofing system for flat and low slope facilities. The top coat is an elastomeric coating. To learn more about elastomeric coatings, click here. Together, the two-part roofing system insulates, seals and protects your building.
Here are several special considerations that your roofing contractor must keep in mind when it comes to applying foam roof coatings:
Polyurea roof coatings are made of two components: isocyanate and polyol. Using transfer pumps, your roofing contractor will perfectly proportion your foam roof coating at a one to one ratio for the two components. Then the components are mixed in a spray gun and applied to the roof deck.
The foam roof coating must be applied evenly so as to prevent ponding, which can deteriorate the elastomeric top coating and expose your foam to the elements. With proper installation, though, the risk of ponding is alleviated and the roofing system should function properly for years to come.
One reason SPF roofing systems are so popular for commercial applications is because the base coat of the two-part system—polyurea roof coating—is an excellent insulator. In fact, foam roof coatings can have up to three times the r-value of other insulations. This reduces noise, improves temperature control and seals the roof completely.
For green building, this means maximized energy efficiency, minimized energy bills and overall sustainability.
The two main ingredients for polyurea roof coatings are isocyanate and polyol. The first of these—isocyanate—is highly hazardous when inhaled. As such, the Occupational Safety and Health Administration (OSHA) regulates worksites that use foam roof coatings as the insulation component for a roofing system.
Roofing contractors that use polyurea coatings on their worksites need to be aware of OSHA guidelines, which outline three ”employer responsibilities”: fully disclose and communicate all potential hazards to employees, train your employees in how to safely apply polyurea roof coatings and establish an appropriate exposure control system. An experienced roofing contractor will understand the OSHA guidelines inside and out, and be able to establish a safe installation environment in your facility.
When considering installing, replacing or repairing your roofing system, call the St. Louis commercial roofing experts at Wildwood Roofing & Construction. We’re more than the run-of-the-mill commercial roofing contractor—we hold ourselves to a higher standard. We stand behind every roofing project we’ve completed throughout the greater St. Louis community. That’s why our past commercial clients have such good things to say about our fast turnaround, technical expertise and exceptional service.
For your next commercial build, call Wildwood Roofing & Construction for a consultation.
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