Steel Roof Over 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.

Steel roof over shingles.

Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them from being thrown into landfills. Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. Metal roofing is also available in the form of 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. Advantages of metal roofs over shingles. Anatomy of a steel roof this is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. 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. Before you install metal roofing repair any damage to the wood under the shingles. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Yes oxygen and pollutants in water combined with the moisture create iron oxide otherwise known as rust.

Then cover the entire roof with a layer of insulation and secure it with a staple gun. The first way is to run new underlayment over the existing shingle roof completely covering the old roof. However you do have the option of leaving the shingles in place and installing the roofing over them if the roof is in good shape. Asphalt shingles can weigh up to four pounds per square foot depending on the brand.

This provides a couple of benefits. Metal roofing weighs less than one pound per square foot. There are really two ways to install a metal roof over a shingle roof. Otherwise you will need to remove the shingles.

The removal itself could cost anywhere from 3 to 5 per square foot. In some areas building officials only allow a re roof over one layer of shingles. A galvanized steel metal roof is highly susceptible to corrosion and rust over a period of time. Next use 1 inch nails to secure some metal edging to the perimeter of the roof.

You ll be surprised to learn that the primary cause of rusting and corrosion is water. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. Replacing shingles with metal roofing is not necessarily difficult but it will require labor and time.