If you wish to install a solar panel on your roof building regulations will normally apply.
The ability of the existing roof to carry the load (weight) of the panel will need to be checked and proven. Some strengthening work may be needed.
Building regulations also apply to other aspects of the work such as electrical installation. It is advisable to contact an installer who can provide the necessary advice, preferably one who belongs to the Competent Person Scheme.
General guidance on the performance expected of materials and building work in order to comply with the building regulations and practical examples and solutions on how to achieve compliance for some of the more common building situations can be found in the approved documents section.