Underlayment

On a real claim

Underlayment is the protective layer between the deck and the shingles, felt or synthetic, that sheds water and guards the deck. On a claim it is a covered material on most full replacements, and its condition often decides whether a repair or a full tear-off is warranted. What goes wrong: reusing old underlayment under new shingles voids most manufacturer warranties, and a carrier that did not price it forces a change order mid-job. Check the underlayment spec and confirm the estimate carries it before work starts.

Common questions