Installation of photovoltaic panels on tile roof

The best way to install solar panels on a lightweight tile roof is through a method called inset solar installation, also known as a “comp-out” installation. This technique removes the section of tile where the solar panels will be installed and replaces it with composite shingles before mounting the solar array.

Yes, solar panels can be installed on a tile roof. In fact, companies have developed methods to install solar panels on tile roofs. Before installation, there's a pre-installation or preparatory stage to consider.

Mounting the solar panels – Once the new roof section is complete, a solar expert installs the racking system and solar panels securely onto the composite shingles. Unlike tile, these shingles can handle the weight and pressure of solar mounting without breaking.

If installers attempt to mount solar panels directly onto lightweight tiles, several issues can arise: Tile breakage: Walking on or drilling through these tiles can cause cracks or breaks, which may lead to roof leaks and structural damage.

Future damage from vibrations: Even if tiles remain intact during installation, they can weaken over time. Wind moving between the solar panels and the racking system can create vibrations that cause tiles to crack down the road. Because of these risks, standard installation methods won't work for tile roofs —especially lightweight ones.

By removing tiles and installing composite shingles underneath the solar panels, this method eliminates the risk of cracking tiles during installation or in the future. It also prevents damage to the underlayment, which is critical for waterproofing.