Bitumen Roof Shrinkage

Thanks to technological advancements and improvements to epdm roofs though shrinkage has diminished significantly.

Bitumen roof shrinkage.

The shrinkage of the top surface is commonly due to normal aging and weathering of the shingle over the years. Shrinkage of a membrane often damages base flashings or the roof edge assembly leading to water infiltration. A few decades ago unreinforced rubber roof systems were plagued by shrinkage problems but thanks to technological advancements and improvements to epdm roofs the problems have diminished. Methods recommended for preventing shrinkage include adhesion of the whole roofing system and peripheral attachment of the membrane to the deck.

While roof shrinkage technically involves parts of the roof shrinking to an extent it rarely makes your roof look visibly smaller. It is most common on epdm or modified bitumen roofs and is usually caused by aging of the material poor installation or excessive uv exposure. Its causes include aging of the material poor installation and uv exposure. Shrinkage is most common on epdm or modified bitumen roofs.

The swelling of the underside of the shingle is commonly due to the migration of excessive amounts of airborne moisture from the attic spaces through the roof deck and into the bottom surface of the shingle. The material is based on the same materials used in asphalt shingles. Roof shrinkage is no easy matter to deal with. Asphalt roll roofing or membrane is a roofing material commonly used for buildings that feature a low sloped roof pitch in north america.