Putting A Roof On Top Of Another Roof

Roofing over your existing roof.

Putting a roof on top of another roof. Probably 90 of the metal roofs being put on today are exposed screw metal. Roofing over your old roof can save you around 1 000 on installation costs because the roofing company won t have to remove and dispose of old shingles. But before we get started one thing must be clear. So if there are already two layers the choice is made for you.

The manufacturers themselves will tell you that even the best screws for a metal roof only last approximately 8 to 12 years then you will start to get leaks. Lay a metal roofing panel over the existing roof material in the bottom corner of the roof surface and fasten to the roof according to the metal panel instructions. Metal roofing materials are available in several styles that require different fastening applications but are most commonly screwed to the roof framing or sheathing material which in the case of installing over existing roofing material should be fastened using 2 1 2 inch screws. There are already two layers of shingles on your roof most building codes only allow two layers of any type of roofing on your home.

Now that we ve taken care of the primary question at hand we ll consider a couple of reasons why you might want to do this. Adding new roofing over old sometimes called a re roof is possible only with asphalt shingles also called composition shingles. Here are some reasons to do that. Attach with nails along the top edge of the strip.

Also i have to disagree with the statements here that a metal roof will last longer than shingles. The answer is yes you can lay new roof shingles over old ones. You need to tear off the roof and install a new one. As to the ceiling stain in the living room this may have occurred prior to installing the new shingles.

Use a starter strip or cut pieces for a starter course. Then we ll look a lot more reasons why you might not want to do this. Rip cut the starter strip or starter pieces so that they butt up against the second course of existing shingles and are even with the front edge of the existing roofing. There are two reasons people generally choose to recover their current roof instead of getting a full replacement.