The style of roof varies from property to property. Most residential property roofs were built using concrete roof tiles, up until the recent introduction of slate tiles, which are widely used across new-build projects and properties that have new roofs fitted. The type of mounting hooks used differ from tile to tile. Plain roof tiles can be easily moved up, allowing access to the roof joists. Hooks are fixed directly into the joists and then protrude out, allowing for the rail to attach. A hook stop (rubber matt), is placed directly under where the hook sits, avoiding any breakages in the existing tiles. The hook stop helps distribute the weight of the hook and subsequent rail and PV modules.
Once the roof hooks have been fixed into place, sitting above the hook stop, the rail can be fitted and any other tiles moved around the hook location, to allow for easier access to the joists, can be placed back and secured down.
Check out the full installation video for this specific project, where you can see up close and personal, exactly how the plain tile roof hooks are fitted and panels mounted.