Install Metal Roof On Top Of Shingles

Metal roofing is also available in the form of shingles.

Install metal roof on top of shingles.

By removing the old roof before the new roof s installation you are able to give the underlayment a thorough inspection to ensure there are no damages that could cause leaks or other issues with your new roof. Yes you can install a metal roof over shingles. However you ll want to check with your local building department before you make any decisions. 3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof.

Next use 1 inch nails to secure some metal edging to the perimeter of the roof. Otherwise you will need to remove the shingles. The purlins are screwed or nailed down to the roof deck depending on how the metal roofing manufacture 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.

Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of 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. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. This is by far the most common way to install a metal roof.

Installing a metal roof over shingles can also result in an increased chance of trapped water vapor and moisture between the new roof and old roof resulting in new mold and rot. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. The second way to install a metal roof over a shingle roof is with the use of purlins or battens.

Then cover the entire roof with a layer of insulation and secure it with a staple gun. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.