Proper Way To Install Metal Roof Over Shingles

Take your first sheet of.

Proper way to install metal roof over shingles.

Choose a day with calm weather to work on the roof. Step 4 install edging. Yes you can install a metal roof over shingles. Metal roofing is very slippery when wet.

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. 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. Step 1 make a slat board base on top of the shingles. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.

Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Most metal shingles will be attached to the roof using metal shingle. 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.

The edging or eave flashing consists of metal strips that are used to cover the perimeter of the roof. 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. Step 2 measure roof. Laying steel roofing over shingles the right way.

Use your 1 1 4. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. 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. Step 1 work safely.

Add the metal panels. How to install a metal roof over shingles with proper tools steel roofs can be noisy and unattractive in residential settings. However if the steel roof is installed over an existing asphalt roof noise shouldn t be a problem. 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.

Step 3 install slat board. Brace your extension ladder. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. In a standing seam roof long single panels run vertically all the way from the eave to the ridge.

Always begin working at the point with the longest peak to eave distance. However you ll want to check with your local building department before you make any decisions.