Proper Way To Install Metal Roof Over Shingles

Brace your extension ladder.

Proper way to install metal roof over shingles.

Step 1 work safely. I frequently am asked whether homeowners and contractors should remove roof shingles from a home s roof before a new metal roof is installed. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems. 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. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. Choose a day with calm weather to work on the roof. Step 2 measure roof.

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. Metal roofing is very slippery when wet. Get a good look at the overall condition of the roof before installing a new metal roof have the opportunity to nail off the plywood to new and more stringent florida building codes. Both metal and shingle roofs are great options for your next roofing project.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. 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. Use your neoprene washer head screws to secure the metal to the sheathing. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

After all you ll be making a significant and long term investment. My answer often surprises people. Otherwise you will need to remove the shingles. Step 5 install metal.

Step 1 make a slat board base on top of the shingles. 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. However it is based upon experience with tens of thousands of installations over many years.

Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Step 4 install edging. Most metal shingles will be attached to the roof using metal shingle. Things to know about metal over shingle roof problems.

However you ll want to check with your local building department before you make any decisions. Laying steel roofing over shingles the right way.