There are several ways to install metal roofing over asphalt shingles, so it’s important to know how to do both. The first step is to attach your new metal roof to the existing roof. To do this, you’ll need a frame made of 2×4 pieces, which is attached to the ribs. You’ll use screws to fasten each panel to the frame. Make sure you space each screw head about eighteen to twenty-four inches apart, and don’t over-tighten them. Next, overlap the first panel with the next one. Do this for the panels on the lower courses, too.
Once you’ve removed the shingles, you’ll need to install your new metal roof. There are two main types: the steel shingle system and the standing seam steel system. The latter is the more common and more expensive option. The standing seam system uses long, continuous panels that are joined together horizontally. It’s possible to leave the asphalt shingles underneath the metal panels, though this is not recommended.
The first type of metal roof is called screw-down. This type is best for a flat roof. You can install it without tearing off the old asphalt roof. However, if you want to replace the existing asphalt roof, you’ll need to tear it off completely. This method requires extensive demolition and removal of the shingles, and can be very labor intensive. Besides, metal roofing will last for decades, so you’ll be saving money in the long run.
The second type of metal roof is the steel shingle system. The steel shingle system is the most popular choice for installing metal roofing over asphalt shingles. The standing seam steel system is more expensive and is more complicated than the former. It consists of long panels that run vertically, while the steel shingles consist of small panels arranged in rows horizontally. In most cases, you’ll find that you can keep the asphalt shingles underneath the metal panels.
It’s also possible to install a metal roof over an existing asphalt shingle roof. You must check the building code for your area to determine if it’s legal to install a metal roof over shingles. Some areas will only allow up to two layers of shingles, and it’s best to check with your local building code before doing it. If you’re not sure whether it’s legal, you can always hire a professional to help you.
You should not use underlayment when installing metal roofing over asphalt shingles. This is because it’s not as durable as shingles and it’s easier to work on. But metal roofing is often a great option for your home if you’ve decided to install it over asphalt shingles. You can even pre-install it to save on the costs. If you’re not comfortable installing a metal roof over a shingle roof, consider a metal roof over a shingled roof.