Size:
• Max. 1200 x 2400 mm.
• Min. 500 x 500 mm.
Upstand:
• Frame height:
- Upstand (timber): From 200 mm with jumps of 50 mm
- Frame height is measured vertically.
• Thickness of upstand:
- Timber: 9 mm plywood/45 mm insulation/9 mm plywood.
• Light opening = roof opening
• Upstand height depends on insulation depth