Bitumen Roof Shrinkage

The shrinkage of the top surface is commonly due to normal aging and weathering of the shingle over the years.

Bitumen roof shrinkage.

Asphalt roll roofing or membrane is a roofing material commonly used for buildings that feature a low sloped roof pitch in north america. Methods recommended for preventing shrinkage include adhesion of the whole roofing system and peripheral attachment of the membrane to the deck. Shrinkage of a membrane often damages base flashings or the roof edge assembly leading to water infiltration. Roof shrinkage is no easy matter to deal with.

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 installation process known as torch on roofing is often used on commercial. Its causes include aging of the material poor installation and uv exposure. While roof shrinkage technically involves parts of the roof shrinking to an extent it rarely makes your roof look visibly smaller.

The more obvious sign of roof shrinkage are highly visible gaps running along the seams where the roofing surface rolls were initially laid out. Shrinkage is most common on epdm or modified bitumen roofs. Thanks to technological advancements and improvements to epdm roofs though shrinkage has diminished significantly. The material is based on the same materials used in asphalt shingles.