Roofing Underlayment Materials Types

The underlayment is an often unseen yet crucial component of today s residential roofing systems it is the layer of waterproofing material that protects the roof deck or substrate from water intrusion in case the outer layer suffers damage.

Roofing underlayment materials types.

Understanding roof underlayment a complete roof system is more than just the final roofing material. It is applied under all other roofing materials as an added layer of protection from severe weather. In summary roofing underlayment is an essential component to the roofing materials ability to withstand the elements protect a home s interior and prolong its service life. A roof system is comprised of multiple components and roof underlayment is an important element of an effective roof system designed to protect both life and property.

There are three basic types of underlayment used beneath roofing materials. Roofing underlayment is a water resistant or waterproof barrier material that is installed directly onto your roof deck. Underlayment is laid beneath every other roof covering including your insulation. Roofing underlayment is most commonly called felt paper or ice and water shield even though they are different underlayment materials.

This used to be the most popular choice for roof underlayment until it was replaced by synthetics. As for the term modified polymers are used to modify bitumen to improve certain characteristics such as elasticity and strength. In the roofing industry this is a common term to refer to asphalt and other asphalt materials used in built up roofing asphalt shingles and underlayment.