4mm — Best Value
A great all-round choice for most UK gardens. Excellent light transmission and the most economical option.
Choose 4mm if: you want the best balance of performance and price.
Both options use the same heavy-duty Polyeco Classic steel frame. The main difference is insulation and price.
A great all-round choice for most UK gardens. Excellent light transmission and the most economical option.
Choose 4mm if: you want the best balance of performance and price.
The thicker polycarbonate provides improved insulation and heat retention, making it a good choice for customers wanting a little more protection from colder temperatures.
Choose 6mm if: insulation and extending the growing season are more important to you.
Still unsure? For most customers, 4mm is perfectly suitable. Choose 6mm if you specifically want the additional insulation.
Our most popular greenhouse combines strength, practical growing space and excellent value.

Designed for narrower gardens and allotment plots, the Slim gives you useful greenhouse growing space without demanding a large footprint.

Durable polycarbonate sheets are securely fixed to the frame, creating a strong and practical greenhouse cover.

The Slim can normally be installed directly onto suitable soil or grass using its ground anchoring system.

2 metres wide and available in a range of lengths, giving you plenty of growing space without wasting your garden.

The Polyeco Slim is designed to make good use of limited space without making the greenhouse feel restrictive.
At just 2m wide, it fits comfortably into smaller gardens, narrower plots and tighter spaces, while still giving you useful room for vegetables, seedlings, herbs and taller crops.
Its straightforward galvanised steel construction keeps things practical and uncomplicated, making the Slim a sensible choice for everyday growing where space matters.
| Width | 2 metres |
|---|---|
| Available lengths | 2m, 4m, 6m, 8m, and longer* |
| Ridge height | Approximately 2.10 metres |
| Frame | Galvanised steel |
| Cover | 4mm or 6mm twin-wall polycarbonate |
| Arch spacing | 1 meter |
| Door | Stable-style door |
| Rear ventilation | Included |
| Ground anchoring system | Included |
| Concrete base required | No, when installed on suitable soil or grass |
Need a longer greenhouse? Please contact us — longer Slim models are available.
Optional extras such as automatic roof vents, shelving, raised beds and additional doors are available separately.