Synthetic Underlayment

Roofing terms · plain-language definition, with its source

Roofing terms · definition

A woven polymer underlayment — lighter, stronger, and more slip- and tear-resistant than felt; the modern standard.

Source: Wikipedia — Roofing Underlayment (Synthetic)

Where this comes up on this site

  • Underlayment (Roof)

    The water-resistant layer between deck and shingles — felt or synthetic — that backstops the roof covering.

  • Tapered Insulation

    Insulation cut to build slope on a flat roof so water drains to the drains/scuppers instead of ponding.

  • Synthetic / Composite Shingle

    Polymer shingles imitating slate or shake at lighter weight and lower cost than the natural materials, with strong impact ratings.

  • Tear-Off

    Complete removal of the old roof to the deck before re-roofing — allows deck inspection and a proper new system. The recommended approach…

  • Supplement (Claim)

    An adjustment requesting additional payment for damage or code items discovered after the original estimate (e.g., rotten decking found a…

  • TPO Membrane

    A single-ply thermoplastic membrane for low-slope roofs — heat-welded seams, reflective white surface, widely used today.

  • Storm Chaser

    An out-of-area contractor soliciting door-to-door after storms. The reason to vet licensing, local references, and warranty backing befor…

  • Valley

    The internal angle where two roof planes meet, channeling heavy water flow. A leak-prone area requiring careful flashing (open or closed…

Ready to Start Your Project?

Get a free estimate based on real Columbus contractor pricing.

Start Estimating → Read the roofing guides