Installing A Metal Roof
Common Mistakes To Avoid When Installing A Metal Roof
When installed correctly, metal roofs are extremely durable. In fact, they are rated to last far longer than many other types of roofing materials, making them a great option for homes and businesses. Because metal is extremely durable, it does well in just about every climate, meaning that you can install one of these roofs regardless of where you live.
To ensure that your new roof doesn't develop any leaks, however, it is important to install it correctly. This is especially true if you are installing the roof yourself rather than having a professional do it for you. Below is a list of some of the most common mistakes to avoid when installing a metal roof. Carefully read through this list before starting your roofing project so that you can keep from making any potentially costly errors.
1. Using the wrong substrate or underlayment
Metal roofing panels are usually designed to be installed over a solid substrate such as plywood. They can also sometimes be installed over battens rather than solid wood surfaces. As a general thumb rule, however, it is best to put them over a solid surface - particularly for smaller buildings like homes or garages.
Metal roof panels that are installed over battens are more likely to develop condensation behind the panels than those that are installed over solid surfaces. This is caused by the temperature difference between the cold metal panels and the warm, moist air that is trapped underneath them. To minimize problems with condensation, opt for a substrate such as plywood or OSB.
Even if you do install the panels over solid wood decking, you should still use an approved underlayment. This will provide additional protection against condensation, minimizing the likelihood of damage occurring.
2. Using the wrong fasteners
When installing metal roofing, it is important to use the right fasteners. If you use standard screws, water can easily leak in around them. This can cause your roof to fail.
Always look for fasteners that are designed specifically for metal roof panels. These fasteners usually incorporate a special washer that helps seal the opening, keeping water from getting inside.
Most companies that manufacture roof panels have specific recommendations as to what fasteners you should use with their panels. To get the best results, always follow their recommendations. Don't try to save money by skimping on fasteners. The quality of the fasteners is every bit as important as the quality of the roof panels themselves.
3. Failing to adequately overlap the panels
Metal roof panels are designed to overlap with one another, helping you keep water from leaking where two panels meet. The amount of overlap that is required generally depends on the overall slope of your roof.
During the installation process, start by calculating the pitch of your roof. Then, follow the manufacturer's recommendations regarding the amount of overlap that you should use.
4. Failing to check with your insurance company for potential problems before installing your roof.
Insurance companies usually have certain requirements when it comes to the types of roofs that they will and won't cover. For instance, did you know that some insurance companies won't cover metal roofs that have been installed over existing shingles.
The best way to avoid any problems is by contacting your insurance agent to talk to them about the terms of your policy. That way, you can find out if there are any specific rules that you need to follow when it comes to choosing materials or installing your roof.
5. Leaving too much or too little overhang
It is important to leave an appropriate amount of overhang at the edge of your roof. If the roof panels are cut too short, the water can leak down between your gutter and your siding. If they are too long, the water draining off of your roof will overshoot your gutters, falling to the ground instead.
Most experts recommend having the overhang measure anywhere between about an inch-and-a-half and two inches. Again, read the instructions provided by the manufacturer of the particular roofing panels that you are using. They should have recommendations in place regarding the amount of overhang that the roof panels require.
6. Failing to properly calculate the number of materials required
When it comes to buying roofing materials, the calculations can be quite complex. Most roofs have a lot of peaks and valleys, making it difficult to figure out exactly how many panels you need. There are free calculators that you can use online that may help simplify the process.
If you are struggling to figure out how many roof panels you need or if you are afraid of making costly mistakes, don't hesitate to hire a roofing contractor to do the project for you. They can usually complete the work much faster than you could on your own and are much less likely to make mistakes along the way.
Next article: Step By Step Guide To Roof Replacement.