How to Install Metal Roofing Over Shingles
Before you can learn how to install metal roofing over shingles, you must have the roof deck in good condition and remove any damaged or curling shingles. This will give the metal roofing the best conditions for installation. Do not forget to replace or repair any damaged shingles that may cause oil-canning effects on the metal roofing. In this case, you must replace or repair the shingles first. Then, you can proceed with installing the metal roofing.
The first step in the process is to cut the valleys of the panels. You can do this yourself by measuring them beforehand and removing some of the old ones. Do not forget to place the screws in the right positions so that they will fit well. Also, it is a good idea to avoid scratching the metal as it may cause rust later. Avoid using abrasives or other gritty substances on the metal to prevent scratches. Also, the rubber closure strips must fit the shape of the metal roof, as otherwise, water will penetrate them.
While there are a few benefits of installing metal roofing over shingles, the main advantage is the cost and labor savings. Unlike shingles, metal roofs are durable and won’t need to be replaced as often, which can reduce the overall cost of the installation. Also, a metal roof can last the lifetime of your home and will not require any repairs. This means that it can be installed without tearing down the old roof. Roofer New Albany
Metal roofing can be installed over shingles, but you must consult your local building department to determine if you can do so. Some areas only allow metal roofing over one layer of shingles, while others allow up to two layers. There are some advantages and disadvantages to metal roofing over shingles, so talk with a local roofing company if you are unsure. It may be possible to avoid these problems by pre-installing the new roof over the existing shingles.
Before installing metal roofing over shingles, it’s essential to prepare the roof surface. To start with, install a slat board base across the entire roof surface. Once it’s installed, attach the metal edging with roofing nails and apply them to the shingles. Once installed, lay the metal sheets one at a time, making sure that they overlap each other. Once you’ve installed all four sheets, you’ll need to apply a vapor barrier to prevent shingles from catching on the metal.
In addition to installing the new roof, you must take good measurements of the existing shingles. Make sure that everything is straight and free of mechanical problems before you install the new roof. Be sure to check that the plywood that underlays the existing shingle roof is solid. If the wood is not stable enough, it will not hold the screws and will be vulnerable to wind damage. Therefore, you should hire a roof contractor to do the job.