If you want to know how to install metal roofing over asphalt shingles, then chances are that you are also going to need to know about the other materials that you will be using. Just like with any other roofing option, it is always best to research all of the materials that you will need to purchase and make sure that they will work for your particular situation. When it comes to this option, there are two basic options that you have. These include having asphalt shingles or metal roofs installed.
If you are going to choose to go with the installation of asphalt roofs, you are going to need to find a contractor that can perform the job. Keep in mind that installing metal roofing over asphalt shingles is not the same as installing ceramic tile roofing over clay tiles. In fact, it is quite different from having regular roofing installed. Since asphalt is actually a heavier material than clay tiles, it can pose a number of problems when it comes to weight distribution. This issue becomes even more pronounced if you are going to use a sloped roof as opposed to a flat roof.
Another important consideration that you should make when learning how to install metal roofing over asphalt shingles is the type of metal that you will be using. The type of metal that you use will be determined by the existing roof. For example, if you are going to install slate shingles over clay tiles, then you are going to need a different type of metal roofing than you would if you were going to install aluminum shingles over clay tiles. Even though most manufacturers will be able to point out the types of materials that they recommend for installation, you should still check with a local building code office to ensure that you are following the appropriate guidelines. In many cases, local boards of construction will be able to give you the information that you need.
Once you have checked with the relevant authorities, it is time to determine what type of roofing you will be using. If you live in an area that experiences high winds, then metal roofs are likely to be a good choice. They can deflect the force of strong winds without being damaged. However, metal roofs can also be vulnerable to damage caused by rain and snow. This means that it is a good idea to check your local roofing codes carefully. You may also find that local building rules require that you install your metal roof above an existing roof that is made from clay tiles or slate.
If you are going to install asphalt shingles over metal roofing, then the only thing that you need to concern yourself with is the type of underlayment that you will be using. Generally, the underlayment that you install will provide some form of cushion between the shingles and the roof. There are different types of underlayment available on the market today. The most common types are Type A underlayment and Type S. It is a good idea to check the instructions with your local home improvement store. Different manufacturers of these products should provide instructions that are easy to follow.
Asphalt shingles are very vulnerable to being damaged by the sun. This makes it very difficult to install a metal roof over asphalt roofs. Asphalt shingles do not fare well in areas where there is considerable amount of sunlight. Metal roofing over asphalt roofs can only withstand limited amounts of sunlight.