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How To Replace A Damaged Asphalt Roof Shingle
By Jerry Holt
 

Tom Richardson of Tucson, AZ wrote:

Dear DIY Today,

My roof has asphalt shingles that are damaged. Some of them are broken and curled. What's the easiest way to replace damaged asphalt roof shingles?

Well Tom, this is a article I wrote a while back that will answer your question:

The next time you take a look at you house you should take time to see if there are any torn, broken or buckled asphalt shingles on your roof. It may well be time to replace some shingles. Replacing asphalt shingles is a job most do it yourself individuals can do, but if you're unsure or if you're not comfortable with heights you might want to consider hiring a roofing contractor. 

Before you get started make sure the weather is going to be warm for a couple of days with no rain in the forecast.

You're going to need:

Hammer
Pry Bar
Ladder
Caulk Gun
Roofing Tar
Roofing Nails (1 1/4")
Asphalt Shingles

First you're going to have to get rid of the old asphalt shingles before you can replace the shingles. You'll need a flat pry bar to lift up the shingle. Start by loosening the shingle tab above the damaged shingle. Next place it under the damaged shingle tab to raise it and then pry the nails out. If you can't remove it completely use a claw hammer to finish the job. Continue with this process until all of the damaged shingles that need replaced are removed.

Now it's time to replace the asphalt shingle. Place the new shingle exactly how it was removed. Nail it in place with 1 1/4" roofing nails. You're going to have to reseal the new shingle by using asphalt roofing tar to coat the nail heads. Don't forget to cement each tab with about a 1 inch diameter dab of the tar. Continue on with the same procedure for the other damaged asphalt shingles that need replaced.

Don't forget safety:

• Don't be leaning over the edge of the roof. Use your ladder for replacing old shingles on the edge of the roof.
   
• Make sure your ladder is set up on a flat surface and that it won't move or slide.
   
• If your roof has a steep pitch you are going to need roof jacks that are available at your local rental store. These are usually made of metal and are basically brackets that are nailed into the rafters or the sheathing. Then you place boards across the brackets to obtain a work platform. You may need to set up several roof jacks depending on how many damaged shingles you plan on replacing.
   
• Don't try to replace damaged shingles in the rain or if your roof is wet as it can get pretty slippery up there.

Good luck with your project and remember - safety first!

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