Step Flashing

Roofing terms · plain-language definition, with its source

Roofing terms · definition

Overlapping L-shaped metal pieces woven into shingle courses where a roof meets a sidewall. Missing/reused step flashing is a leading wall-leak cause.

Source: Wikipedia — Flashing (Step)

Where this comes up on this site

  • Flashing

    Thin water-resistant material installed at joints and transitions (roof-to-wall, around windows and penetrations) to direct water away an…

  • Storm Chaser

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

  • Starter Strip

    The first adhesive course at the eave/rake that seals and anchors the first shingles against wind uplift.

  • Supplement (Claim)

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

  • Standing Seam Metal Roof

    A metal roof of vertical panels joined by raised, concealed-fastener seams. Long-lived and low-maintenance; a premium system.

  • Synthetic / Composite Shingle

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

  • Square

    The roofing unit of area = 100 sq ft. Roofs are estimated and priced by the square, plus a waste factor.

  • Synthetic Underlayment

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

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