If you are looking to install a metal roof over existing shingles, it is essential to place a quality subfloor layer between them. This will provide an additional protective barrier for the metal roof and prevent creasing, which would ultimately compromise its final appearance. Shingles that expand and contract can cause damage under the metal roof over time, so it is generally recommended to remove the shingles before installation. Metal roofs have a number of advantages, including their long lifespan, attractive curb appeal, environmental friendliness and durability.
Knowing how to install a metal roof over shingles is important to the homeowner, whether they want to do it themselves or hire professionals. The subfloor provides an extra layer of protection from inclement weather and absorbs some of the noise of rain or other elements hitting the roof. If for some reason the metal roof is damaged and the shingles underneath are also damaged, you are looking at doubling the repair costs. Joints and moldings are available in steel with matching finishes and colors for your residential, commercial, industrial or agricultural metal roofing project. The question remains: do metal roofs need an undercoat or can they work just as well without it? The answer is yes - metal roofs do need an undercoat in order to be properly installed.
This is the fastest way to install, but it does not provide the flattest surface for installation. It is important to check with your local building department to see if you can install metal roofs over two layers of shingles. Letting professionals get foolproof results will make everyone happy and ensure that your home has a properly and professionally installed metal roof. In conclusion, when installing a metal roof over existing shingles, it is essential to place a quality subfloor layer between them for optimal results.