News & Advice

Roofers use an underlayment, often asphalt-saturated felt, beneath shingles for additional protection.

Different purposes and have distinct characteristics…

1. Underlayment
   • Its primary function is to provide an additional barrier against water infiltration and to protect the roof deck from moisture damage.
   • Also serves as a secondary line of defense in case the outer roofing material is damaged or compromised.
   • Common types of underlayment include synthetic roofing underlayment, asphalt-saturated felt, and rubberized asphalt membrane.
2. Asphalt-Saturated Felt
   • Also known as roofing felt or tar paper, is a type of underlayment made from organic or fiberglass matting saturated with asphalt.
   • It is commonly used as a traditional roofing underlayment due to its affordability and effectiveness in providing temporary waterproofing during roof installation.
   • While asphalt-saturated felt provides basic waterproofing, it may not offer the same level of durability or longevity as synthetic underlayment options.