Proper Way To Install Metal Roof Over Shingles

The industry standard for underlayment is often thought of as felt paper tar paper but there are also many newer synthetic underlayments that are designed to work well with metal roofing.

Proper way to install metal roof 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. Always begin working at the point with the longest peak to eave distance. However if the steel roof is installed over an existing asphalt roof noise shouldn t be a problem. Add the metal panels.

Step 2 measure roof. Yes you can install a metal roof over shingles. 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. This method has its benefits as well.

Step 5 install metal. Step 1 work safely. Step 3 install slat board. Step 4 install edging.

Step 1 make a slat board base on top of the shingles. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. The edging or eave flashing consists of metal strips that are used to cover the perimeter of the roof. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof.

Choose a day with calm weather to work on the roof. How to install a metal roof over shingles with proper tools steel roofs can be noisy and unattractive in residential settings. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Use your 1 1 4.

Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Otherwise you will need to remove the shingles. A layer of underlayment installed on top of the existing shingles will help keep the granules of the old shingles from rubbing against the back of the metal and causing possible corrosion. Brace your extension ladder.

Metal roofing is very slippery when wet. The second way to install a metal roof over a shingle roof is with the use of purlins or battens. In a standing seam roof long single panels run vertically all the way from the eave to the ridge. However you ll want to check with your local building department before you make any decisions.

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. Laying steel roofing over shingles the right way.