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.

Multiwall polycarbonate greenhouse glazing panels

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.

Request a quote MOQ & shipping

From the factory