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How To Install Metal Roofing Over Existing Shingles

How To Install Metal Roofing Over Existing Shingles. The first involves running a new underlayment over and completely covering the existing shingles. In contrast, steel shingles are small panels installed in horizontal rows.

Should You Install a Metal Roof Over Shingles? from livingstonroofpros.com

To determine whether you can place new roofing materials over the existing ones, look for rotted wood sheeting or rafters. The image above illustrates a general furring strip approach, although, as you might guess, there are numerous variations to this method. The new underlayment offers more protection against water seeping under the metal roofing and acts as a buffer between the shingle roof and the metal.

Attach With Nails Along The Top Edge Of The Strip.

The new underlayment offers more protection against water seeping under the metal roofing and acts as a buffer between the shingle roof and the metal. It is made out of breathable synthetic material and designed to. Lay the shingles on the whole surface of your roof;

The New Bottom Roof Edge Must Be Installed Before The Metal Roofing To Allow The Natural Flow Of Water Off The Roof.

In contrast, steel shingles are small panels installed in horizontal rows. The second way is to install 1×4 purlins over the shingles. Align the first metal roofing panel so that it overlaps the edging by 1/2 to 3/4 of an inch and is square to the roof line.

The Image Above Illustrates A General Furring Strip Approach, Although, As You Might Guess, There Are Numerous Variations To This Method.

The next step in preparing your roof deck is to use a special product called roofing underlayment. When you come to a jack, cut a hole in the metal directly above the pipe or vent. Alternatively, a metal shingles roof can be installed over the old asphalt shingles, if you do not want to tear it off, provided there is only one layer of existing shingles on the roof.

The First Involves Running A New Underlayment Over And Completely Covering The Existing Shingles.

Installing metal roofing over shingles is by far the best option when it comes to metal roofing. When done, install the ridge cap shingles over the ridge. Next, the battens attach through the roof deck to your rafters.

However, If The Steel Roof Is Installed Over An Existing Asphalt Roof, Noise Shouldn’t Be A Problem.

Step four cut/remove 4” of the end of the starter strip shingle. If this is the primary motivation behind burying the existing shingle roof underneath your new metal roof, you should put a pencil to paper and do the math on what you actually save. You won’t get to replace crucial roofing materials

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