What Happens If Water Gets Under Shingles?
The water begins to back up under flashings, shingles, tar paper

tar paper

Common grades include 10-, 20-, 30-, and 60-minute. The higher the rating, the heavier and more moisture-resistant the paper. A typical 20-minute paper will weigh about 3.3 lbs per square, a 30-minute paper 3.75, and a 60-minute paper about 6.

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, etc. Once water begins to flow into the house, it can drip for days. The only means of prevention is to install membranes under the roofing. The membranes won't stop the ice but will stop water leaks if installed properly.

Is it OK for shingles to get wet?

Other common shortcuts your roofer should avoid: Do not shingle over wet or damp roof sheathing or damp felt paper. The trapped moisture cannot evaporate when the sun heats the shingle. If you plan to stay in the home for the next 10 years, do not shingle over older shingles.

What do I do if there is water in my roof?

WHAT TO DO IF WATER IS LEAKING THROUGH YOUR CEILING

  1. Get something to contain the water. Grab one or more waterproof containers to catch dripping water. ...
  2. Move or cover your furniture. ...
  3. Soak up water on the floor. ...
  4. Make a small hole for drainage. ...
  5. Call a plumber or roofer.
James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.

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