Metal Roof On Top Of Old Shingles

1 remove the shingles before installing the metal roof the first way to install a metal roof over shingles is by completely removing the old shingles before installing the new metal roof.

Metal roof on top of old shingles.

Many many metal roof installations are over existing shingles. This makes it a perfect material to be installed right on top of an existing shingle roof. However before you decide on reroofing with a metal roof you have to keep in mind that there are specific conditions that make reroofing with a metal roof safe. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

As you probably know a metal roof is a major initial investment so knowing some of the drawbacks of this roofing material is important. One of the major advantages of metal roofing is that it is very lightweight. However there are some things that you will want to check out before doing it this way. For one you will need to check with your local building department and ask if this is an approved installation method.

Standing seam roofs may have unevenness of the old shingles telegraphed through and cause ripples in the standing seam. While metal roof systems are one of the most durable and environmentally friendly roofing material available on the market it does come with its fair share of disadvantages. 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. One big advantage to metal roofing is its light weight which means metal roofing can be installed over an existing shingle roof.

Some roofing contractors recommend reroofing with standing seam metal because the total roof weight is but a fraction of a standard asphalt shingle roof which helps preserve the roofing integrity. Otherwise you will need to remove the shingles. A common installation tactic for adding metal roof over shingles is to add small slats of wood and secure those slats of wood to the roof decking. It is easier to do with more heavily textured metal roofs such as exposed fastened corrugated products and metal shingles.

A benefit to doing it this way is that you can see if there is any rotten plywood that needs to be replaced before installing the new 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. These slats of wood run perpendicular to the metal roofing itself. Common metal roof problems.

No you do not have to tear off your shingle roof. Metal roofing can be installed over top of shingles.