Customized Expansion Joint NBR EPDM Silicone Rubber Bellows

What is a roof expansion joint?
A roof expansion joint is a flexible closure used to minimize. the effects of building movement or stress on a roof system. A roof designer will usually require roof expansion joints to. coincide with a building's structural expansion joints or places.

Do concrete floors need expansion joints?
All concrete will shrink slightly as it dries and, when it's set, will expand or contract depending on the ambient temperature. To prevent cracks from forming, concrete expansion joints should be incorporated to allow for movement, particularly in slabs with a surface area exceeding 6m2.

Where are expansion joints required?
Pavement expansion joints are only needed when: The pavement is divided into long panels (60 ft (18 m) or more) without contraction joints in-between. The pavement is constructed while ambient temperatures are below 40F (4C). The contraction joints are allowed to be infiltrated by large incompressible materials.