My comp shingle roof is nearing the end of its life and has lost a few tiles. Is there a coating product that can be applied?

Question

My comp shingle roof is nearing the end of its life and has lost a few tiles. Is there a coating product that can be applied?

Asked by Barrie Herr

It's a pitched roof.

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Answers

Doug Cameron, LEED GA's picture

The shingles coming loose should be remedied immediately, before expensive water damage is done.

Have a trusted roofing professional -- or better yet, your insurance adjuster -- come take a look at the remainder of the roof.

  • Loose shingles can occur without serious degradation of the asphalt and fiberglass.
  • The cause is usually high winds or hail, but wind especially if the roof is not pitched enough (less than 4:12).

I have recently seen a waterproof membrane in a spray can that is sold on TV.

  • I would not recommend using anything like this in your case, as the shingle method creates a protective path for water to flow down a roof.
  • Even if the membrane is waterproof, the overlapping action of the shingles would potentially be compromised.
  • Plus, who knows how long something like that can hold up to the sun's ultraviolet rays?

My recommendation: Don't take shortcuts when it comes to protecting your home from water.

For more information:

Read "The concrete tile roof on our 30-year-old home has started to leak. Can it be repaired by replacing the roofing paper?" a Q&A answered by Polly Osborne.