Many property owners worry about damaging their roof on installing a rooftop solar PV power plant. However, as these installations will last at least for 25 years, so it is important to make sure that all pre-existing damage to the roof is assessed and repaired, if needed.
It is also to be noted that the installation being done should be well within the safety limits and it should be able to withstand the weight of an additional structure without any structural damage, leakage and water logging, etc.
PV module mounting structures designed and installed correctly do not cause damage to the roof. The spacing of brackets and purlins spreads the weight of the solar panels across a large cross-section of the roof area. If you have a flat roof, you won’t need to put holes in it for installation. Installations on flat roofs commonly use ballast mounting systems which involve no holes.
A few examples of ballast mounting structures used widely these days are:
Roof damage as a result of a solar PV power plant installation is extremely rare because installers take precautionary steps while installing the structure and the solar panels. However, if property owners are concerned about damage to the roof, they can question the installer about their installation process, measures they take to prevent roof damage and workmanship warranty, and check whether it covers the roof damage in case it occurs.