Domestic solar energy systems are mainly placed on roofs because that provides the best sunlight exposure. That being said, you may be concerned about whether the installation causes damage to the roof. Here are a few facts so you will know from the outset just what you will be getting into if you choose to install solar panels onto your roof.
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Most roofs are built to hold at least 8 to 10 pounds per square foot of pressure above and beyond the weight of the roofing material. That is usually more than sufficient weight bearing capacity to hold solar panels. That said, each house needs to be evaluated individually. A professional installer or building inspector can assess the capacity of your roof in bearing the solar panels.
Most installers attach the solar panel mounts to the beams. This makes the installation very secure and distributes the load better than when the mounts are fastened to roof decking. As rooftop installations have been done for over 30 years, professional installers are knowledgeable about the best methods to ensure stability and avoid damage.
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Before scheduling your solar panel installation, consider the age and present condition of your roof. Since the mounts would be installed on the roofing material, they would need to be removed and reinstalled if you decide to replace your roof. So if you plan on replacing your roof within the next 5 to 10 years, consider replacing it before you install your new solar panel system. That way you can avoid the additional cost of removal and reinstallation.
If you are still leery about putting solar panels on your roof, a ground-mounted system may be the answer. The same criteria apply to selecting a solar panel array location whether on a roof or on the ground. They must receive enough sunlight during the day to generate the electricity that your house requires, and it must be devoid of anything that might block it from the sun. If your property has such a location, it might be a good alternative to roof installation.
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