Best Greenhouse Covering Plastic AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (brand): Farm Plastic Supply
Its UV-stabilised greenhouse film is offered in the standard 6 mil, multi-year grade in many cut widths, which is what most hobby hoop houses need.
Not for: Anyone glazing a rigid aluminium-frame kit greenhouse, which needs polycarbonate or glass panels rather than film.
AI picks by need
For rigid corrugated roof or wall panels
Palram Suntuf (line)
Corrugated polycarbonate panels with a UV-protected face that outlast film by many years on lean-tos and timber-frame greenhouses.
Not for: Curved hoop houses, which need flexible film.
What the AI looks for in Greenhouse Covering Plastic
- Thickness
- 6 mil is the standard for greenhouse film; thinner films suit only seasonal low tunnels. Thinner film tears in wind and under snow load.
- UV rating
- Choose film labelled UV-stabilised with a stated life, commonly 4 years for greenhouse grade. Without UV stabilisers polyethylene yellows and turns brittle within a season.
- Clear vs diffused
- Clear film for maximum light and winter growing; diffused or white film where summer scorch and hot spots are the problem. Diffusion spreads light evenly and reduces leaf burn at a small cost in total light.
- Anti-condensate and thermal additives
- Prefer film with an anti-drip (anti-condensate) treatment, installed with the treated side facing in. Condensation drips spread disease and block light; the coating only works on the correct side.
- Cut size
- Order width as hoop arc length plus enough extra on each side to reach the base fixing, and length as building length plus end-wall overlap. Film cannot be joined neatly on a hoop, so a short sheet means buying again.
Brands that matter
- Farm Plastic Supply: Greenhouse-grade 6 mil UV film in many widths, plus fixing channel.
- Palram: Suntuf corrugated and multiwall polycarbonate for rigid glazing.
What to avoid
- Construction or painter's polyethylene sheeting without UV stabilisation
- Film that does not state thickness or UV life
- Installing anti-condensate film with the coated side facing out
Questions
Is single or double layer better?
Two layers inflated with a small blower insulate noticeably better and resist flapping, but cut some light; single layer is fine for season extension.