Sheet Metal Roof Over Shingles

So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt.

Sheet metal roof over shingles.

Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. Metal roofing 3x10 drip edge white corrugated tin. Metal roofing 25 30 in. 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. 3 wide rib panel. By jamie lisse a metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. Screw the metal sheets into the slat board with a wood screw every 2 feet along the edges.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. If you don t want to take our word for it check with your local building department. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.

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. Overlap the rises and dips if using corrugated sheets or lay flat sheeting with a slight vertical overlap. Replacing shingles with metal roofing is not necessarily difficult but it will require labor and time.

Otherwise you will need to remove the shingles. Asphalt shingles can weigh up to four pounds per square foot depending on the brand. Space the screws about 12 in 30 cm apart down the entire piece of metal. 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.

Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise. 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. 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.

The removal itself could cost anywhere from 3 to 5 per square foot. Sheet metal metal roof panels 12 ft. Take care the first piece is aligned precisely perpendicular square to the edge.