Proper Way To Install Metal Roofing Over Shingles

Step 2 measure roof.

Proper way to install metal roofing over shingles.

Install metal roofing sheets. 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. Choose a day with calm weather to work on the roof. Step 3 install slat board.

Brace your extension ladder. 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. 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. For exposed fasteners avoid over tightening the fastener.

Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Step 4 install edging. Metal roofing sheets have to be installed one at a time. Use your neoprene washer head screws to secure the metal to the sheathing.

Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Yes you can install a metal roof over shingles. Laying steel roofing over shingles the right way. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.

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 is very slippery when wet. Place a sheet from top to bottom on a section of the roof. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof.

However you ll want to check with your local building department before you make any decisions. In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Most metal shingles will be attached to the roof using metal shingle. Space the screws about 12 in 30 cm apart.

Use 1 4 inch metal wood screws to attach the metal sheets to the wood slat board base. Step 1 work safely.