Roof glazing as well as the wall/window glazing can break down. All can be replaced as required. It is worth considering the type of glazed unit, especially in the roof, as there are many types of glass; tinted, heat reducing, self-leaning and so on. Not all will match any existing glass, so may not be practical to change individual panels with a different specification. To upgrade from polycarbonate would need very careful consideration due to the large increase of weight on the base structure and thus may be inadvisable.
For more details, call 0800 163197, or Request a Quotation