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Polyurethane Foam Recoat Case Study

This polyurethane foam roof was installed over ten years ago. On average, most of these roof types have 1 to 2 inches of foam sprayed onto an existing roof substrate such as a built up, modified bitumen, or metal roof. They are then coated with either an acrylic or silicone roof coating. Polyurethane foam is a great roof system, but it must be coated every ten years to protect it from the suns harmful UV rays.

Our roof coating system requires us to clean the top surface of the roof with 1,500 to 2,000 psi of pressure. In order to not damage the current coating system installed on the roof, we do not recommend heavy power-washing. We do recommend a detergent, such as TSP, to clean any heavy residue off the roof surface.

The next step was to cut out any damaged foam and spray additional foam into the damaged areas to match the current foam system. It is especially important to cut out any areas where water has saturated the system. If there are only small blisters, these may be cut out and patched using a polyester fabric and one of our top coats to seal the area.

After all areas of concern are addressed,
our fabric bonding agent is applied to the entire roof area to ensure that our top coating will adhere to the current system. Finally, two coats of our durable top coats are sprayed on the roof surface to form a seamless, bright white membrane to protect the foam UV rays for many years to come.

Please contact us to receive a free survey of your roof.

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