Impact-Rated Shingle

Related terms

• Insulation Baffle

  A chute at the eave keeping insulation from blocking soffit-vent airflow into the attic.

• Ice Dam

  A ridge of ice at the eave from attic heat melting and refreezing snow, forcing water back under shingles. Fixed by air-sealing, insulati…

• Low-Slope vs. Steep-Slope

  The dividing line (about 3:12) that determines whether shingles can be used or a membrane system is required.

• Ice & Water Shield

  A self-adhered waterproof membrane at eaves, valleys, and penetrations that blocks ice-dam and wind-driven-rain leaks. Code-required at e…

• Manufacturer Warranty

  Coverage on the shingles/system from the maker. Enhanced/system warranties require all-matched components and certified-installer registr…

• Hip & Ridge Cap

  Specialized shingles that wrap and seal the roof's hips and ridges. Upgraded caps improve wind rating and appearance.

• Modified Bitumen

  A rolled, polymer-modified asphalt membrane for low-slope roofs, torch- or self-adhered. A common residential flat-roof system.

• Hip

  The external angle where two sloping roof planes meet, running from ridge to eave. Hip roofs shed wind well but use more material.