Science of Bitumen Heating in Waterproofing Have you ever wondered why we heat bitumen during torch‑on waterproofing? This video explains the science behind the process — from heat activation to strong adhesion and ultimate waterproofing performance. Why do we heat bitumen? Bitumen starts as a solid, dense material. When heated with a torch, it reaches its softening point and turns into a thick, flexible liquid. This transformation allows the bitumen to spread evenly, fill small gaps, and form a

Liquid bitumen is applied to the wood beam. The process of applying liquid bitumen.

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