Polycarbonate Greenhouses Guide
Polycarbonate greenhouses offer a safer, more practical alternative to traditional glass structures. With shatterproof glazing that’s 200 times stronger than glass, these modern greenhouses protect your plants while keeping children and pets safe from broken glass hazards.
Shatterproof
Safe for Kids & Pets
High Insulation
Twin-Wall Options Available
Up to 20-Year Warranty
On Elite Aluminium Frames
Free UK Delivery
On Elite, Vitavia & Palram
About Our Polycarbonate Greenhouses
Our collection features models from Britain’s most trusted manufacturers. You’ll find everything from compact 6x8 starter greenhouses to spacious 10x12 growing spaces, all constructed with virtually unbreakable twin-wall or clear polycarbonate glazing.
Palram Canopia
The Palram Canopia Hybrid Greenhouses combine 4mm twin-wall polycarbonate roof panels with crystal-clear single polycarbonate side walls, giving you 90% light transmission. Every Palram greenhouse includes a 5-year manufacturer warranty.
Elite Greenhouses
For serious growers, Elite Greenhouses feature premium twin-wall polycarbonate options up to 10mm. Elite's commitment to quality is so high they back their aluminium frames with a market-leading 20-year warranty.
Vitavia Greenhouses
Vitavia Greenhouses offer excellent value with 4mm twin-wall polycarbonate. Their sliding door design and integrated roof vents provide easy access, while the 12-year warranty gives you long-term peace of mind.
🔧 Matt's Installation Tip: Windproofing Polycarbonate
The number one question I get is: "Will the panels blow out?" The answer depends on installation.
Palram Canopia greenhouses use a "Slide-and-Lock" system that is naturally wind-resistant. However, for Elite and Vitavia models using Twin-Wall sheets with clips, I highly recommend running a bead of clear low-modulus silicone along the glazing bars during assembly. This "glues" the lightweight panel to the frame, stopping the rattle and making the structure essentially storm-proof.
Quick Guide: Which Polycarbonate is Right for You?
| Brand | Glazing Type | Key Benefit | Warranty |
|---|---|---|---|
| Palram Canopia | Clear / Hybrid | Safety & Ease of Assembly | 5-10 Years |
| Vitavia | Twin-Wall (4mm/6mm) | Thermal Efficiency | 12 Years |
| Elite | Twin-Wall (Up to 10mm) | Heavy Duty Strength | 20 Years |
Why We Chose Elite, Vitavia & Palram
“We stock these three manufacturers to cover every grower's need. We chose Palram Canopia for their 'SnapGlas' technology—perfect for families. We stock Elite and Vitavia for the serious grower who wants the thermal efficiency of Twin-Wall polycarbonate combined with a traditional heavy-duty aluminium frame. Elite's commitment to quality is so high they back their frames with a 20-year warranty, double the industry standard of many imported rivals.”
— Matt, Founder of Greenhouse StoresFrequently Asked Questions
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How much do polycarbonate greenhouses cost?
Entry-level polycarbonate greenhouses start from £350–£500 for compact 4x6 models. Most gardeners opt for 6x8 models (£500–£850), while premium 8x10 designs with 6mm glazing and powder-coated frames cost £900–£1,500.
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Do polycarbonate greenhouses turn yellow and how long do they last?
Cheap, unbranded polycarbonate will yellow. However, we only stock UV-stabilised models. Palram models typically have 5-10 year warranties, Vitavia offers a 12-year warranty, and Elite offers an exceptional 20-year warranty on their aluminium frames.
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Which is better: twin-wall or clear polycarbonate panels?
Twin-wall polycarbonate provides superior insulation (R-value ~1.7) versus single-layer clear panels (~0.9). Twin-wall is ideal for year-round growing, while clear panels deliver 90% light transmission and traditional glass aesthetics.
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Are polycarbonate greenhouses strong enough for windy gardens?
Yes. Polycarbonate panels are 200 times more impact-resistant than glass. When anchored to a concrete or slab base (how to build a concrete base), and sealed with silicone (see Matt's Tip above), they withstand winds up to 56mph.
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How much warmer is a polycarbonate greenhouse than outside?
A well-sealed twin-wall polycarbonate greenhouse maintains temperatures 5–8°C warmer than outdoors on sunny days without heating and retains heat more effectively overnight.
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What maintenance do polycarbonate greenhouses need?
Clean annually with warm, soapy water and a soft cloth. Avoid abrasive cleaners or rough sponges that can scratch the UV-protective surface.