Putting Metal Roofing Over Shingles

A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

Putting metal roofing over shingles.

Both metal and shingle roofs are great options for your next roofing project. There are two primary methods implemented when installing metal roofing over shingles. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. 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.

Advantages of metal roofs over shingles. 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. Installing a new metal roof over an old shingled roof also affects bridger steel s warranties because the abrasions from the rocks on shingles can cause backside wear as the metal expands and contracts from both hot and cold weather. This allows the new underlayment to act as a line of defense in the event that water somehow gets under the metal roof.

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. Yes you can and by doing so you save in the labor and hassle of tearing off the old roof and you won t be contributing to filling our landfills. Another added benefit is that the layers of your old roof will further insulate your home. The second benefit is that it acts as a.

By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them from being thrown into landfills. Disadvantages of metal roofs. Otherwise you will need to remove the shingles. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems. The second way to install a metal roof over a shingle roof is with the use of purlins or battens. After all you ll be making a significant and long term investment.

Things to know about metal over shingle roof problems. The first is running new underlayment over an existing shingle roof thus covering the old roof.