Insulation
Spray Foam and a White Coat on a Corrugated Roof
The old roof was washed, sprayed with polyurethane foam and painted white to stand up to the sun.
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Step by step
1. Washing
The old sheets were black with dirt. Pressure washing leaves a clean surface for the foam to stick to.
2. Spraying
The foam is sprayed onto the sheets and follows their shape, covering the joints and screws.
3. White coat
A white protective coat goes over the foam, because unprotected foam wears out in the sun.
4. The result
A roof with no open joints that reflects the heat instead of passing it into the space below.
Questions this job answers
My metal roof leaks and gets scorching in summer. What can be done?Water usually gets in at the screws, the joints between sheets and the corner with the wall. Spray polyurethane foam with a white coat closes those spots and insulates against the heat.On a leaking metal or corrugated roof, is sealing the joints and screws enough, or does it need a full coating?If the metal sheets themselves are sound, cleaning and sealing the parapet joint and every screw head is enough. If the whole surface is weathered or overheats in summer, a full reflective coating or sprayed polyurethane foam is applied.