Sheet Metal Roof Over Shingles

Overlap the rises and dips if using corrugated sheets or lay flat sheeting with a slight vertical overlap.

Sheet metal roof over shingles.

Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. 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.

Sheet metal metal roof panels 12 ft. Screw the metal sheets into the slat board with a wood screw every 2 feet along the edges. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. Asphalt shingles can weigh up to four pounds per square foot depending on the brand.

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. Begin laying the metal sheets from the bottom to the top of the roof. Metal roofing 25 30 in. 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.

The removal itself could cost anywhere from 3 to 5 per square foot. Metal roofing 3x10 drip edge white corrugated tin. 3 wide rib panel. 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. Take care the first piece is aligned precisely perpendicular square to the edge. By jamie lisse a metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. Metal roofing weighs less than one pound per square foot.

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

Metal is the best choice due to its very low weight per square foot and its unique design. Replacing shingles with metal roofing is not necessarily difficult but it will require labor and time. Otherwise you will need to remove the shingles.