Most roof warranties contain conditions that can be broken unbeknownst to the homeowner by the installation work on the roof. It is best to read your warranty first.
Check Your Warranty Terms First
Before fixing begins, read the roofing warranty terms and conditions relating to third-party penetrations, fixtures and work on the roof after the initial installation. It is common for such warranties to be voided if work is carried out on the roof surface by anyone other than the original installer or with their approval.
Use an MCS-Certified Installer
Work done on a roof that is still under warranty must be carried out by an installer who is accredited by the relevant roof manufacturer. Many manufacturers are members of the Construction Industry Scheme (MCS) and use their accredited installers to ensure that work is completed to the highest standards and in line with warranty terms.
Know Which Warranty Covers What
Two different warranties typically exist for a roof: one for the roof covering (roof tiles, felt or membrane etc) and one for the roof structure (rafters etc). Solar panel fixings affect the materials warranty primarily, but could also affect the structural warranty where the fixings penetrate through into the roof structure. Check the roofing contractors warranty for the specific elements that they guarantee. For Solar Panel Installation Cirencester see https://www.precisiongreenenergy.co.uk/renewables/solar-panel-installation/cirencester/
Ask for a Workmanship Guarantee on the Fixings
This is in addition to the product warranty on the solar panels, and local solar installers such as those for Solar Panel Installation Cirencester will be experienced in dealing with the types of roofing found in the Cotswolds, including properties with clay or stone slate roofs.
Keep a Photographic Record
Take dated photos of the roof before the work is started and after the work has been completed. These photos will be invaluable should a leak or damage occur at a later date and will provide clear evidence of what has caused the problem.
A little preparation now will save you from a potentially expensive dispute later.