Putting A Roof On Top Of Another Roof

Use 1 5 or 1 75 inch roofing nails.

Putting a roof on top of another roof.

Use a starter strip or cut pieces for a starter course. But before we get started one thing must be clear. Probably 90 of the metal roofs being put on today are exposed screw metal. Place the top of each starter shingle firmly against the bottom of the shingle immediately above it and even with the eaves then nail it into place.

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. 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. Roofing over your existing roof.

There are two reasons people generally choose to recover their current roof instead of getting a full replacement. 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. 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. If you have serious doubts about the integrity of the new roof a second opinion should be.

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. 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. The answer is yes you can lay new roof shingles over old ones. Here are some reasons to do that.

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. You need to tear off the roof and install a new one. Attach with nails along the top edge of the strip. Then we ll look a lot more reasons why you might not want to do this.