Proper Way To Install Metal Roofing Over Shingles

Laying steel roofing over shingles the right way.

Proper way to install metal roofing over shingles.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Step 5 install metal. Step 4 install edging. Step 1 work safely.

Venting the eaves to vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath. However you ll want to check with your local building department before you make any decisions. Step 2 measure roof. Install metal roofing sheets.

Use your neoprene washer head screws to secure the metal to the sheathing. Most metal shingles will be attached to the roof using metal shingle. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Brace your extension ladder.

Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Use 1 4 inch metal wood screws to attach the metal sheets to the wood slat board base. Choose a day with calm weather to work on the roof. 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.

Place a sheet from top to bottom on a section of the roof. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. If you want to install steel over asphalt your best choice is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel. Space the screws about 12 in 30 cm apart.

A layer of underlayment installed on top of the existing shingles will help keep the granules of the old shingles from rubbing against the back of the metal and causing possible corrosion. Metal roofing sheets have to be installed one at a time. Metal roofing is very slippery when wet. Step 3 install slat board.

Yes you can install a metal roof over shingles. For exposed fasteners avoid over tightening the fastener.