Ok To Install Metal Roofing Directly Over Shingles

Asphalt shingles can weigh up to four pounds per square foot depending on the brand.

Ok to install metal roofing directly over shingles.

As long as the plywood under the shingle roof is in good condition this way can provide many benefits. This is by far the most common way to install a metal roof. If you install metal over shingles if you do decide to install your new metal roof over your old shingles be sure to consult local building codes. 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.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Metal roofing weighs less than one pound per square foot. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Both metal and shingle roofs are great options for your next roofing project.

This method has its benefits as well. 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. Otherwise you will need to remove the shingles. After all you ll be making a significant and long term investment.

Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. The second way to install a metal roof over a shingle roof is with the use of purlins or battens. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems.

In some areas building officials only allow a re roof over one layer of shingles. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. If you don t want to take our word for it check with your local building department. Yes you can install a metal roof over shingles.

3 install 1x4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1x4 purlins over the shingle roof. Some jurisdictions require a full and complete tear off whenever a new roof is being installed.