Steel Roof Over Shingles

Advantages of metal roofs over shingles.

Steel roof 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. Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. Before you install metal roofing repair any damage to the wood under the shingles. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

A steel roof is a lifetime investment lasting 50 years or more if it s a good one. Metal roofing is also available in the form of shingles. 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. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

Metal roofing weighs less than one pound per square foot. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. If you don t want to take our word for it check with your local building department. Next use 1 inch nails to secure some metal edging to the perimeter of the roof.

A galvanized steel metal roof is highly susceptible to corrosion and rust over a period of time. Asphalt shingles can weigh up to four pounds per square foot depending on the brand. The first way is to run new underlayment over the existing shingle roof completely covering the old roof. Otherwise you will need to remove the 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. The first one being that the new underlayment will act as a second line of defense in case water would to somehow get underneath the metal roof. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Yes oxygen and pollutants in water combined with the moisture create iron oxide otherwise known as rust.

The removal itself could cost anywhere from 3 to 5 per square foot. Replacing shingles with metal roofing is not necessarily difficult but it will require labor and time. In some areas building officials only allow a re roof over one layer of shingles. This provides a couple of benefits.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. 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. 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.