Built-Up Roofing Systems have good waterproofing characteristics but suffers from a loss of ductility after prolonged exposure to UV.
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Roof Ponding – Water retention on a low-slope roof caused by inadequate roof drainage or structural deflection. |
Alligatoring – Cracking of a built up roof producing a pattern similar to an alligator’s hide. |
Weathering – Deterioration of a built up roof caused by exposure to weather, thermal expansion, acid rain and UV degradation. |
Extreme Heat – Excessive heat build up on dark colored roofs. Temperatures can reach 180°F or more in the summer. |
Asphalt degradation is a growing concern. UV-rays oxidize the surface of the asphalt built up roof and produces a chalk-like residue. As plasticizers leach out of the asphalt, the asphalt built up roof becomes brittle. Cracking and alligatoring inevitably follows, allowing water to penetrate the system causing blisters, cracks and leaks.
Perform annual inspection and repair any damage immediately. Penetrations like vents, pipes or ductwork can open up and may need to be re-sealed periodically. Blisters or delaminations should be cut off and repaired since they will leak over time.
Leaks in built up roofs are difficult to isolate and a seamless roof coating system is the best alternative to roof replacement.
Learn more about Built Up Roof Repair or Built Up Roof Coating.
Gravel removal (spudding) is required. We recommend installing at least 2” thick sprayed polyurethane foam on the roof to smooth out the dimples and create positive slope towards the drain. EnergyGuard® Acrylic Elastomeric Coating or EnergyGuard® Silicone Elastomeric Coating should be applied over the new foam to prevent UV degradation.
Add 10 or more years to your built up roof with our built up roof restoration system. Get a seamless roof without costly tear off and disruption. Stop roof leaks and prevent further degradation.
EnergyGuard® Acrylic Elastomeric Coating is a good choice if your smooth built up roof is properly sloped and does not pond water.
EnergyGuard® Butyl Elastomeric Coating is excellent for smooth built up roofs with minor ponding that cannot be rectified. Larger ponds should be corrected or area drains need to be installed.Your Roof Reborn®
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