Your garden's most-used room, whatever the weather.
A polycarbonate hardtop gazebo changes how you use your garden — not just in summer, but across the whole year.
Imagine a late-September evening, the light fading, rain tapping quietly on the roof above while you sit dry and comfortable underneath. The cream curtains drawn, the mesh screens keeping the midges out.
At 11.5 square metres, there's room for a dining table, a few chairs, and the kind of unhurried evening that doesn't have to end because the weather turned.
The roof is constructed from 7mm twin-wall translucent polycarbonate panels — the same material used in commercial greenhouses for its strength and light diffusion. It blocks 99% of UV and sheds rain completely, while still letting natural light filter through.
The powder-coated aluminium frame is corrosion-resistant and built to handle British conditions. It's rated to Windproof Level 6 (up to 49km/h) and carries a snow load capacity of 100kg — reassuring for year-round use.
Each of the four sides has a full-length curtain with velcro tie-backs and a separate breathable mesh screen. The curtains are water-resistant polyester (180g/m²) — practical for light rain and effective at blocking wind chill.
Assembly requires 2–4 people and typically takes 2–3 hours. The gazebo can be anchored to hard surfaces using the included expansion bolts, or to lawn and soil using the included ground stakes. For timber decking, specialist wood expansion screws are recommended to avoid splitting (not included). Planning permission is not generally required under permitted development rights — always confirm with your local council if unsure.
Key Features
Specifications
| Brand | Outsunny |
| Type | Polycarbonate Hardtop Gazebo |
| Colour | Brownish black frame, dark brown roof, beige curtains, black netting |
| Frame Material | Powder-coated aluminium & metal |
| Roof Material | 7mm translucent polycarbonate board |
| Curtain Material | 180g/m² polyester |
| Mosquito Net Material | Breathable mesh cloth |
| Overall Dimensions | 420L x 360W x 275H cm |
| Peak Height | 275cm |
| Eaves Height | 205cm |
| Floor Area | 11.5m² |
| Snow Load Capacity | 100kg |
| Windproof Rating | Level 6 (39–49km/h) |
| UV & Water Resistance | 99% |
| Product Weight | 106.5kg |
| Assembly Time | 2–3 hours |
| People Required for Assembly | 2–4 recommended |
| Number of Boxes | 5 (whole product) |
| Warranty | 1 year — manufacturer defects only |
| SKU | 84C-042 |
Assembly & Setup
Download Assembly Instructions (PDF)What's in the Box
- 1 x Polycarbonate Gazebo
- 4 x Mosquito Nets
- 4 x Side Panels With Tie Backs
- 12 x Expansion Bolts
- 12 x Ground Stakes
- 1 x Assembly Instructions
Why Buy From Opal Retail?
UK-Based Support
Our customer service team is based in the UK and available Monday to Friday. We're here to help before, during, and after your purchase.
1-Year Warranty
Every gazebo we sell comes with a minimum 1-year warranty. Buy with confidence knowing we stand behind the quality of everything we stock.
Free Returns
Not quite right? Return any item within 30 days for a full refund, no questions asked. We make the process as straightforward as possible.
Secure Payment
All transactions are encrypted and processed securely. We accept all major cards, PayPal, Klarna, Clearpay, and Shop Pay.
Frequently Asked Questions
Yes. The polycarbonate roof is rated to 99% UV and water resistance, and the aluminium frame is powder-coated for corrosion resistance. The structure is rated to Windproof Level 6 (up to 49km/h) and can bear a snow load of 100kg, making it a practical choice for all four seasons. Many customers leave theirs up throughout the year.
Assembly typically takes 2–3 hours and is recommended for 2–4 people due to the size and weight of the components. Full assembly instructions are included in the box. We'd suggest setting aside a half-day and having at least two adults available to manage the roof panels safely.
Yes — the gazebo is suitable for all surfaces. Expansion bolts are included for hard surfaces such as concrete and paving. Ground stakes are included for lawns and soft ground. For timber decking, specialist wood expansion screws are recommended to avoid splitting the boards — these are not included and will need to be sourced separately.
Planning permission is not generally required for a garden gazebo of this size, as it typically falls under permitted development rights in England and Wales. However, rules can vary depending on your property type, location, and local authority. We always recommend checking with your local council before installation if you have any doubt.
The curtains are made from 180g/m² polyester and are water-resistant, providing a practical barrier against light rain and wind chill. They are not fully waterproof in heavy or sustained rainfall — the polycarbonate hardtop roof provides the primary weather protection. The mesh screens are breathable and designed to keep insects out while allowing airflow.
This gazebo comes with a 1-year manufacturer's warranty covering defects in materials and workmanship. The warranty does not cover damage caused by extreme weather events, improper assembly, or general wear and tear. If you experience any issues within the warranty period, please contact us with your order details and we'll arrange a resolution.
Delivery & Returns
Delivery
- Free standard UK delivery on all orders
- Estimated dispatch within 1-3 working days
- Tracked delivery — you'll receive a tracking link by email
- Mainland UK addresses only
Returns
- 30-day hassle-free returns
- Items must be unused and in original packaging
- Contact our UK support team to arrange a return
- Refunds processed within 5-7 working days