How To Install Corrugated Metal Roofing Over Shingles. Because metal roofs are so light yet so strong, metal roofing panels can typically be easily installed over your existing asphalt roof shingles without the. You can also drastically reduce the labor cost since you can cover more square feet with a single corrugated panel than you.
Once the first sheet is in place, you need to install the remainder of the lowest row of corrugated metal roofing. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. A metal roof could be fabricated with steel shingles or a “standing seam,” a technique which involved folding the edges upwards and laying the sheets over one another.