Installing Metal Roofing Over Existing Roof

Metal roofing is also available in the form of shingles.

Installing metal roofing over existing roof.

Use your neoprene washer head screws to secure the metal to the sheathing. You will need to do a thorough inspection of your current roof. How to install a roof over an existing roof determine the feasibility. Space the screws about 12 in 30 cm apart.

For exposed fasteners avoid over tightening the fastener. Yes you can install a metal roof over shingles. How many layers are there. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. By using roof huggers the existing roof can be left in place. Multiple layers of shingles can make it difficult or impossible for the nails to penetrate. Lay the next panel toward the roof ridge overlapping the first panel 2 to 4 inches unless.

If you have more than two layers of existing roofing material something s gotta give. Inspect the condition of your current roof. The condition of the existing roof is critical. Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of shingles.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. This provides a safer environment for both workers inside the building and the roofers as they install the new roof. In a standing seam roof long single panels run vertically all the way from the eave to the ridge. If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.

The roof should be in sound. 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. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. With the existing roof left in place there are typically no leading edge safety issues.

The primary method for installing a metal roof over asphalt is to fasten a synthetic underlayment atop the existing shingles and then lay the metal roof over that. How to install a metal roof over an existing roof. However you ll want to check with your local building department before you make any decisions.