Bitumen Roof Shrinkage

Its causes include aging of the material poor installation and uv exposure.

Bitumen roof shrinkage.

The shrinkage of the top surface is commonly due to normal aging and weathering of the shingle over the years. Asphalt roll roofing or membrane is a roofing material commonly used for buildings that feature a low sloped roof pitch in north america. The more obvious sign of roof shrinkage are highly visible gaps running along the seams where the roofing surface rolls were initially laid out. Methods recommended for preventing shrinkage include adhesion of the whole roofing system and peripheral attachment of the membrane to the deck.

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. The material is based on the same materials used in asphalt shingles. An organic felt or fiberglass mat saturated with asphalt and faced with granular stone aggregate. 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.

Roof shrinkage is no easy matter to deal with. Thanks to technological advancements and improvements to epdm roofs though shrinkage has diminished significantly. Shrinkage is most common on epdm or modified bitumen roofs. While roof shrinkage technically involves parts of the roof shrinking to an extent it rarely makes your roof look visibly smaller.