Proper Way To Install Metal Roofing Over Shingles

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.

Proper way to install metal roofing over shingles.

Yes you can install a metal roof over shingles. Install metal roofing sheets. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Choose a day with calm weather to work on the roof.

Step 3 install slat board. Space the screws about 12 in 30 cm apart. 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. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal 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. Use 1 4 inch metal wood screws to attach the metal sheets to the wood slat board base. Step 5 install metal. However you ll want to check with your local building department before you make any decisions.

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. For exposed fasteners avoid over tightening the fastener. Most metal shingles will be attached to the roof using metal shingle.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Place a sheet from top to bottom on a section of the roof. Metal roofing sheets have to be installed one at a time. Use your neoprene washer head screws to secure the metal to the sheathing.

Brace your extension ladder. Step 4 install edging. Laying steel roofing over shingles the right way. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.

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