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
Tucson, AZ

It's a pitched roof.


Doug Cameron, LEED GA

Answered by Doug Cameron, LEED GA

Austin, TX

EcoSafe Spaces, LLC

August 1, 2011

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.

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