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What Do Roofers Put Under Shingles?

What Do Roofers Put Under Shingles

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.

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