Steel Roof Over Shingles

3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof.

Steel roof over shingles. A galvanized steel metal roof is highly susceptible to corrosion and rust over a period of time. Manufacturers provide 30 year warranties on metal roofing products. This is by far the most common way to install a metal roof. Thank you for a wonderful site.

You ll be surprised to learn that the primary cause of rusting and corrosion is water. Put the steel down directly on a vapor barrier. If a steel roof is installed over shingles with some moss i know the moss dies but will it cause any rotting of shingles or wood underneath or will it dry and be inert. The purlins are screwed or nailed down to the roof deck depending on how the metal roofing manufacture has testing for their roofing panels and then the metal is installed to the purlins.

It doesn t matter if the air space is a half inch or six inches because the condensation factor will remain the same. We get asked this question all the time. As long as the plywood under the shingle roof is in good condition this way can provide many benefits. Can i install a new metal roof over shingles.

Use furring strips to build a slat board on the roof then mount the steel. Cool outside air travels under the shingles to the vented ridge pulling out moisture and heat. Installing steel roofing over existing roofing materials is fairly simple. Yes oxygen and pollutants in water combined with the moisture create iron oxide otherwise known as rust.

The second way to install a metal roof over a shingle roof is with the use of purlins or battens. The second way to install a metal roof over a shingle roof is with the use of purlins or battens. 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. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

Metal roofing is resistant to fire rot and termites. September 28 2016 at 10 24 am. Metal roof over shingles condensation metal roofs must be laid flat on a vapor barrier because steel will condensate if there s any air space underneath it. Otherwise you will need to remove the shingles.

Asphalt roofs typically last 20 to 30 years depending on the installation and shingle quality. However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. This method has its benefits as well.