Roof underlayment and flashing are two important components of a roofing system that play a crucial role in protecting a building from water damage. In this post, we will delve into the details of roof underlayment and flashing, explaining what they are, how they work, and why they are important.
Roof underlayment is a layer of material that is installed under the roofing material to provide an extra layer of protection for the roof. It is often made of a synthetic material such as felt paper, rubberized asphalt, or a synthetic polymer. Roof underlayment is installed on top of the roof deck and under the roofing material, and serves as a secondary water barrier in case the primary roofing material fails.