Roofing Metal Over Shingles

If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel.

Roofing metal over shingles.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Both metal and shingle roofs are great options for your next roofing project. Metal is the best choice due to its very low weight per square foot and its unique design. Reroofing with metal some roofing contractors recommend reroofing with standing seam metal because the total roof weight is but a fraction of a standard asphalt shingle roof which helps preserve the roofing integrity.

However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Asphalt shingles can weigh up to four pounds per square foot depending on the brand. Otherwise you will need to remove the shingles. Now there are metal shingles and panels that imitate materials like slate tile wood shake and even asphalt.

Advantages of metal roofs over shingles. However metal roofing is surging in popularity as more aesthetic options become available. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems. Metal roofing weighs less than one pound per square foot.

The second way to install a metal roof over a shingle roof is with the use of purlins or battens. Asphalt shingle roofing is a dominant material for residences. By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them. Things to know about metal over shingle roof problems.

The purlins are screwed or nailed down to the roof deck depending on how the metal roofing manufacturer has testing for their roofing panels and then the metal is installed to the purlins. If you don t want to take our word for it check with your local building department. After all you ll be making a significant and long term investment. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof.

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.