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Beoordeeld door Tom ReillySenior Editorial Reviewer — Roofing, Carpentry & General Contracting
Who to call · Fresno

Roof sheathing rotFresno, California

Roof sheathing (the plywood or OSB boards nailed to the rafters beneath shingles) can rot when moisture becomes trapped — from a slow leak, poor attic ventilation, or ice dams pushing water under shingles. Soft, spongy spots on the roof surface, sagging between rafters visible from the attic, or dark water stains on sheathing boards are all signs of rot. A roofer can assess the extent of damage, replace affected sheathing panels ($70–$100 per sheet plus labor), and address the moisture source to prevent recurrence.

Who to call

For this problem in Fresno, call a: Dakdekker

Vind een Dakdekker in Fresno

Symptoms to look for

  • Soft or spongy spots when walking on the roof
  • Visible sagging between rafters when viewed from inside the attic
  • Dark stains, mold, or fungus on attic-side sheathing boards
  • Shingles that appear wavy, cupped, or dipped in certain areas

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