The ten-year guarantee covers the quality of our workmanship on the installation or replacement we carried out. In plain terms, if a rooflight we fitted lets water in, or fails at a junction we made, because of the way we installed it, we will come back and put it right at no cost to you.
That includes the parts of the job that are ours: the upstand or kerb we built, the flashing and weathering we dressed, the seals and fixings we made, and the way the unit was set into the opening. It runs for ten years from the date we complete the installation.