Bituminous coatings are usually much less flexible than other types of waterproofing materials, which suggests they might crack over time because of temperature modifications or building motion. This sort of waterproofing entails applying a layer of bitumen, which is a sticky and viscous materials, onto the floor of the roof. The bitumen coating acts as an effective barrier against wa... https://www.celticsblog.com/users/goldet.ofeith