Greenhouse Polycarbonate Panels
Horticultural glazing that holds heat, survives hail and diffuses light onto the crop.
Multiwall polycarbonate has largely replaced glass in commercial horticulture for three reasons: the trapped air insulates, so heating costs fall; it does not shatter under hail; and it diffuses light, which spreads growth across the canopy instead of scorching the top leaves.
Diffusion is the underrated one. Direct light through clear glass produces hot spots and shaded lower foliage. Diffused light reaches deeper into the crop.
Specification by climate
| Condition | Specify |
|---|---|
| Mild climate, unheated | Twin-wall 6–8 mm |
| Cold winters, heated | Triple-wall or X-structure 10–16 mm |
| Hail risk | Solid 4 mm, or thicker multiwall |
| High light crops | Clear with UV on the outer face |
| Heat-sensitive crops | Opal or diffusing grade |
Anti-drip (anti-fog) treatment is worth specifying for any heated house: it makes condensation run down the inside face as a film instead of dripping onto the crop, which reduces disease pressure. See anti-fog sheet.
Typical applications
- Commercial horticultural greenhouses
- Research and propagation glasshouses
- Garden centre and retail nursery structures
- Polytunnel end walls and vents
- Cold frames and growing chambers
Minimum order and lead time
This grade ships from 100 m² or 1 tonne — a trial pallet, not a full container. Standard sizes and stock colours run in 7–10 days; non-standard thickness or width in 12–18 days; add 3–7 days for CNC cut-to-size work. Quoted in USD on FOB, CIF or DDP terms. Full detail on the MOQ, lead time & shipping page.
Questions buyers ask
Is polycarbonate better than glass for a greenhouse?
For most growers, yes: better insulation, no shattering, lighter frames and diffused light. Glass keeps a small edge in absolute light transmission and surface durability over very long periods.
Which way up do the panels go?
UV-protected face outwards, flutes running vertically so condensation drains. Both mistakes are common and both shorten panel life dramatically.
How long will greenhouse panels last?
With UV protection and correct installation, 15–20 years is normal, retaining ≥ 85% light transmission at ten years.