The major cause of excessive heat build up in conservatories is the roof. Clear polycarbonate allows 80% of the suns solar energy to pass directly into the conservatory.

As a result, the air temperature rises in the enclosed space making occupation uncomfortable. This is often referred to as "the greenhouse effect".

M G Sun Control Systems solar inserts act as a solar shield preventing the majority of the suns solar energy passing through the roof whilst at the same time allowing high levels of natural light into the conservatory. The bright airy feel is maintained, UV and glare are dramatically reduced.