Sheet Metal Roof Over Shingles

If you don t want to take our word for it check with your local building department.

Sheet metal roof over shingles.

Metal roofs generally can run from 120 to 900 per 100 square feet one 10 foot by 10 foot area or a square of material while asphalt shingles will be between 100 and 200 per 100 square. Space the screws about 12 in 30 cm apart down the entire piece of metal. Take care the first piece is aligned precisely perpendicular square to the edge. Otherwise you will need to remove the shingles.

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. Screw the metal sheets into the slat board with a wood screw every 2 feet along the edges. By jamie lisse a metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.

However you do have the option of leaving the shingles in place and installing the roofing over them if the roof is in good shape. Overlap the rises and dips if using corrugated sheets or lay flat sheeting with a slight vertical overlap. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Begin laying the metal sheets from the bottom to the top of the roof.

Metal roofing weighs less than one pound per square foot. Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3 4 in 1 9 cm. Metal is the best choice due to its very low weight per square foot and its unique design. 3 wide rib panel.

Most metal shingles will be attached to the roof using metal shingle. Metal roofing 3x10 drip edge white corrugated tin. Sheet metal metal roof panels 12 ft. Most codes now allow no more than two layers of roofing before requiring a complete tear off.

Screw the first sheet in the center as well as the edges. So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. The removal itself could cost anywhere from 3 to 5 per square foot. Metal roofing 25 30 in.