Warehouse operators want daylight — lighting is 15–30% of a warehouse power bill — but every skylight is a hole in your insulation. Done wrong, 5% skylight area erases half the thermal benefit of an insulated roof. Done right, it pays for itself in under two years.
The right way: matched daylight panels
Instead of cutting field-made openings, we supply polycarbonate daylight panels rolled to the same Great Wall profile as the aluminum panels. They lap and fasten identically, so the roof stays weathertight without site-fabricated flashing. Multiwall polycarbonate (16–25mm) keeps the U-value within sight of the insulated field rather than a single-glazed hole.
How much skylight area?
- 3–5% of roof area reaches 150–200 lux average on the floor in daytime — enough to keep lights off in circulation aisles.
- Spread strips evenly rather than clustering; you want uniformity, not bright stripes.
- In the Gulf, use opal (diffusing) rather than clear sheets to cut glare and solar gain; in cloudier climates clear is fine.
Detailing that matters
Every skylight edge is a potential leak and thermal bridge; the flashing and trims guide shows the closure details we ship. For high-wind coastal sites like Sohar, daylight panels get additional fastener rows per the wind uplift schedule in our load capacity guide.
FAQ
Q: Do daylight panels yellow?
UV-coextruded polycarbonate carries a 10-year non-yellowing warranty; expect 15–20 years of useful service.
Q: Are they walkable?
No — never step on daylight panels; mark them and use walk boards on adjacent aluminum panels.
Q: Can they be added later?
Yes, panel-for-panel swap on an existing Great Wall roof is a half-day job per strip.
Need a quote? Send your roof area, location and target U-value to sales@insulatedaluminumroof.com or WhatsApp +86 155 2274 6824. GSM BuildTech ships insulated Great Wall aluminum panels (长城瓦) factory-direct from Tianjin, China.