Proper Way To Install Metal Roofing Over Shingles

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.

Proper way to install metal roofing over shingles.

Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Step 2 measure roof. Yes you can install a metal roof over shingles. Space the screws about 12 in 30 cm apart.

Step 1 work safely. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. Laying steel roofing over shingles the right way. 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.

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. Step 4 install edging. Metal roofing sheets have to be installed one at a time. For exposed fasteners avoid over tightening the fastener.

Install metal roofing sheets. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. However you ll want to check with your local building department before you make any decisions. Step 5 install metal.

This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Brace your extension ladder. Metal roofing is very slippery when wet.

Place a sheet from top to bottom on a section of the 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. In a standing seam roof long single panels run vertically all the way from the eave to the ridge. It provides a solid flat surface to attach the new metal roof to it creates an air gap between the back of the metal and the shingle roof which allows for airflow.

Step 3 install slat board. Use your neoprene washer head screws to secure the metal to the sheathing.