Your garden, sheltered and yours — whatever the weather.
A hardtop gazebo transforms how you use your garden — not just in summer, but across the seasons. Imagine morning coffee under a polycarbonate roof while rain taps quietly overhead, or an evening gathering that runs long past dusk.
The 3 x 4m footprint gives you genuine space — room for a dining set, a lounge arrangement, or a hot tub surround without feeling cramped.
Draw the curtains, zip the netting, and the outside world stays exactly where you want it.
The 6mm twin-wall polycarbonate roof blocks over 96.7% of harmful UVA and UVB rays while letting natural light through — so the space beneath stays bright without becoming a greenhouse.
The two-tier roof design isn't decorative. The raised centre panel creates a natural chimney effect, drawing warm air upward and reducing heat build-up on still summer days.
The powder-coated aluminium frame is built to stand permanently. Column footings measure 17 x 17cm and the structure anchors to hard surfaces via expansion screws or soft ground via stakes — rated to winds up to 31mph (49km/h).
Assembly takes around 3 hours with 2–4 people. No planning permission is required under permitted development rights, though it's always worth checking with your local council if you have any doubt.
Key Features
Specifications
| Brand | Outsunny |
| Overall Dimensions | 400L x 300W x 263H cm |
| Coverage Area | 12m² |
| Beam Height | 193cm |
| Column Spacing | 355L x 255W cm |
| Column Size | 7.6 x 7.6cm |
| Foot Size | 17 x 17cm |
| Roof Material | 6mm Polycarbonate (UPF30+, blocks 96.7% UVA/UVB) |
| Frame Material | Powder-Coated Aluminium |
| Curtain Material | 160g/m² Polyester |
| Frame Colour | Brown |
| Roof Colour | Brown |
| Curtain Colour | Beige |
| Wind Rating | Up to 31mph / 49km/h |
| Snow Load | 20kg/m² |
| Sun Protection | UPF30+ |
| Waterproof | Yes |
| Product Weight | 73kg |
| Assembly Time | Approx. 3 hours (2–4 people) |
| Number of Boxes | 2 |
| Warranty | 1 year (parts and manufacturer defects) |
Assembly & Setup
Download Assembly Instructions (PDF)What's in the Box
- 1 x Metal Gazebo
- 12 x Ground Stakes
- 12 x Expansion Screws
- 4 x Curtains
- 4 x Mosquito Nets
- 1 x Manual
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
No — this gazebo falls under permitted development rights and does not require planning permission in most cases. However, rules can vary depending on your property type, location, or local authority restrictions. It's always worth checking with your local council if you have any doubt.
Assembly takes approximately 3 hours and is recommended for 2–4 people. The manual guides you through each stage. Having at least two people makes lifting and aligning the roof panels significantly easier and safer.
Yes. The 6mm polycarbonate roof panels are fully waterproof and designed to shed rain effectively. The two-tier design also helps channel water away from the structure, reducing pooling on the roof surface.
The gazebo is rated to winds of up to 31mph (49km/h) when properly anchored. On hard surfaces, use the included expansion screws for maximum stability; on soft ground, use the ground stakes. During severe weather, it's advisable to secure the sidewalls and remove any snow accumulation from the roof.
Yes — the powder-coated aluminium frame and polycarbonate roof are designed for permanent outdoor installation. The structure carries a snow load rating of 20kg/m², making it suitable for UK winters. During heavy snowfall, clearing the roof is recommended as a precaution.
The gazebo is suitable for all surfaces. Use the included expansion screws for hard surfaces such as concrete or paving, and ground stakes for lawns or soft ground. If installing on wooden decking, specialist wood expansion screws are recommended to avoid splitting the timber.
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