Sheet Metal Roof Over Shingles

Replacing shingles with metal roofing is not necessarily difficult but it will require labor and time.

Sheet metal roof over shingles. 3 wide rib panel. Asphalt shingles can weigh up to four pounds per square foot depending on the brand. 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. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.

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. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise. Most codes now allow no more than two layers of roofing before requiring a complete tear off.

So if your roof has two layers it may require a complete tear off even though steel is lighter than asphalt. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Otherwise you will need to remove the shingles. Metal roofing 3x10 drip edge white corrugated tin.

Overlap the rises and dips if using corrugated sheets or lay flat sheeting with a slight vertical overlap. Screw the first sheet in the center as well as the edges. Metal roofing 25 30 in. 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.

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 is the best choice due to its very low weight per square foot and its unique design. 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. Begin laying the metal sheets from the bottom to the top of the roof.

If you don t want to take our word for it check with your local building department. Take care the first piece is aligned precisely perpendicular square to the edge. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. Most metal shingles will be attached to the roof using metal shingle.

Sheet metal metal roof panels 12 ft. Use your neoprene washer head screws to secure the metal to the sheathing. Metal roofing weighs less than one pound per square foot.