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ProArmor Roof deck protection 42-in x 286-ft 1000-sq ft Synthetic Roof Underlayment

Owens Corning ProArmor Roof deck protection 42-in x 286-ft 1000-sq ft Synthetic Roof Underlayment

4.8
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Can thisunderlayment install on top asphalt shingle? Install new shingles without remove old shingles.


No. If you wanted to install new shingles over old shingles (which isn't a great idea because of the added weight, heat, and the first layer will just rot away), just install the new shingles without an underlayment down.

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