Roofing Over Shingles With Metal

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.

Roofing over shingles with metal.

Metal is the best choice due to its very low weight per square foot and its unique design. However metal roofing is surging in popularity as more aesthetic options become available. By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them. As you probably know a metal roof is a major initial investment so knowing some of the drawbacks of this roofing material is important.

However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. The second way to install a metal roof over a shingle roof is with the use of purlins or battens. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.

Below are some of the most common cons of a metal paneled roof. Now there are metal shingles and panels that imitate materials like slate tile wood shake and even asphalt. A galvanized steel metal roof is highly susceptible to corrosion and rust over a period of time. Advantages of metal roofs over shingles.

Asphalt shingles can weigh up to four pounds per square foot depending on the brand. 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. Otherwise you will need to remove the shingles. It provides a solid flat surface to attach the new metal roof to it creates an air gap between the back of the metal and the shingle roof which allows for airflow.

If you don t want to take our word for it check with your local building department. Metal roofing weighs less than one pound per square foot. This method has its benefits as well. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. Metal roofing is also available in the form of shingles. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.