Kreunen Construction of Olive Branch, MS answers these questions. Metal roofs provide a series of extraordinary benefits over asphalt shingles roofing. Some years ago, they were an innovation. Now, thanks to their durability and energy efficiency, they have become an extended roofing option across the US. It may look like a simple job to install a metal roof on top of shingles. Though, every roofer knows that installing metal roofs is a demanding job. You need to have experience and skills with metal roof installation, and if you don’t, you must call a professional. By doing so, you can ensure that your new metal roof will not give you problems later. The roofer will build a slat board base over the shingles. This base will support the metal roofing panels. So, this slat board will have lengthwise furring boards lying every two feet along the roof. Then, your roofer will fasten them to the roof from the bottom up to the top of it with 3-inch wood screws.