Size Guide

All sizes quoted on our website refer to the internal visible glass size. This dimension must correspond precisely with the finished roof opening to ensure correct fit and performance. External dimensions differ to accommodate the perimeter frame, insulation build-up, and structural detailing.

For detailed guidance on preparing the roof opening, installation tolerances, and structural considerations, please refer to our installation guides .

Quoted Internal Size (mm)	External Size (mm)	Weight (kg)
300x300	500x500	8
400x400	600x600	12
500x500	700x700	14
600x600	800x800	28
600x900	800x1100	32
600x1200	800x1400	49
600x1500	800x1700	50
600x1800	800x2000	58
600x2000	800x2200	65
600x2500	800x2700	92
800x800	1000x1000	42
800x1000	1000x1200	46
800x1200	1000x1400	59
800x1500	1000x1700	72
800x1800	1000x2000	85
800x2000	1000x2200	91
800x2500	1000x2700	106
1000x1000	1200x1200	61
1000x1200	1200x1400	71
1000x1500	1200x1700	85
1000x2000	1200x2200	99
1000x2500	1200x2700	111
1000x3000	1200x3200	133
1200x1200	1400x1400	89
1200x1800	1400x2000	92
1200x2000	1400x2200	118
1200x2500	1400x2700	131
1500x1500	1700x1700	137
1500x2000	1700x2200	152
1500x2500	1700x2700	189
1500x3000	1700x3200	223