Bitumen Roof Shrinkage

The material is based on the same materials used in asphalt shingles.

Bitumen roof shrinkage.

Roof shrinkage is no easy matter to deal with. Shrinkage of a membrane often damages base flashings or the roof edge assembly leading to water infiltration. 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. The shrinkage of the top surface is commonly due to normal aging and weathering of the shingle over the years.

Shrinkage is most common on epdm or modified bitumen roofs. Methods recommended for preventing shrinkage include adhesion of the whole roofing system and peripheral attachment of the membrane to the deck. The more obvious sign of roof shrinkage are highly visible gaps running along the seams where the roofing surface rolls were initially laid out. The installation process known as torch on roofing is often used on commercial.

While roof shrinkage technically involves parts of the roof shrinking to an extent it rarely makes your roof look visibly smaller. An organic felt or fiberglass mat saturated with asphalt and faced with granular stone aggregate. Its causes include aging of the material poor installation and uv exposure. 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.