Roofing Over Shingles With Metal

A galvanized steel metal roof is highly susceptible to corrosion and rust over a period of time.

Roofing over shingles with metal.

The second way to install a metal roof over a shingle roof is with the use of purlins or battens. Otherwise you will need to remove the shingles. Asphalt shingle roofing is a dominant material for residences. Metal roofing is also available in the form of shingles.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. As you probably know a metal roof is a major initial investment so knowing some of the drawbacks of this roofing material is important. Now there are metal shingles and panels that imitate materials like slate tile wood shake and even asphalt. In a standing seam roof long single panels run vertically all the way from the eave to the ridge.

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. Advantages of metal roofs over shingles. Metal is the best choice due to its very low weight per square foot and its unique design. 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. You ll be surprised to learn that the primary cause of rusting and corrosion is water. However metal roofing is surging in popularity as more aesthetic options become available. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. If you don t want to take our word for it check with your local building department. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof.

Metal roofing weighs less than one pound per square foot. Below are some of the most common cons of a metal paneled roof. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.