Installing Metal Roofing Over Existing Roof

In a standing seam roof long single panels run vertically all the way from the eave to the ridge.

Installing metal roofing over existing roof.

Yes you can install a metal roof over shingles. This provides a safer environment for both workers inside the building and the roofers as they install the new roof. The roof should be in sound. You will need to do a thorough inspection of your current roof.

Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. For exposed fasteners avoid over tightening the fastener. 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.

Space the screws about 12 in 30 cm apart. 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. While metal roofs are routinely installed over existing shingle and asphalt roofs those existing roofs must be up to par for you to reap the long term benefits. 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.

Inspect the condition of your current roof. 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. Use your neoprene washer head screws to secure the metal to the sheathing.

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. The condition of the existing roof is critical. How to install a roof over an existing roof determine the feasibility.

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. How many layers are there. With the existing roof left in place there are typically no leading edge safety issues. However you ll want to check with your local building department before you make any decisions.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Metal roofing is also available in the form of shingles. How to install a metal roof over an existing roof.