Dunster House Leviathan Garden Bar Gazebo with Back Wall | W6m x D3m | Fully Installed Nationwide

The Dunster House Leviathan Garden Bar Gazebo with Back Wall takes everything that makes the Leviathan one of the most impressive outdoor bar structures on the market and adds a full rear wall — transforming it from an open entertaining space into a genuinely enclosed outdoor bar that feels more like a permanent garden building than a gazebo. The back wall creates a defined rear to the structure, gives you a surface to mount shelving, bottle racks, a TV, or a bar back display, and adds a level of shelter and privacy that the open version simply cannot match.

Spanning 6 metres wide and 3 metres deep with chunky 120mm x 120mm uprights and a built-in bar at 1.14m serving height, this is a structure that means business. Supplied by Dunster House and fully installed by our in-house team at Bespoke Oak and Slate across the whole of Mainland UK, it arrives as a complete, ready-to-use outdoor bar. Foundations, felt roof, Smart Seal timber treatment, all fixings — everything included, everything handled by our own team.

Why the Back Wall Makes All the Difference

An open gazebo bar is a fantastic entertaining space. A gazebo bar with a full back wall is something else entirely. The rear wall closes off the structure, giving it the feel of a proper outdoor room rather than a covered area. It provides natural wind shelter from the rear, making the space more comfortable in cooler weather. It gives you a blank canvas for bar back styling — shelves, mirrors, bottle displays, a mounted screen for sport — and it creates a visual backdrop that makes the whole bar look more considered and more permanent.

For anyone who wants their garden bar to look like it belongs rather than like it was added as an afterthought, the back wall version is the one to choose.

Built to the Same Uncompromising Standard

Like every structure in the Leviathan range, this version is built from pressure treated spruce with 120mm x 120mm uprights — among the chunkiest posts in the Dunster House range — and a 19mm tongue and groove roof deck that provides a solid, weathertight base for the felt roof included as standard. At 3.04m overall height with 2.12m of internal eaves clearance, there is genuine headroom throughout the full 6m width of the bar.

Every piece of timber is pressure treated at the factory — not dip treated, but properly pressure treated through to the core — and backed by a 10-year guarantee against rot and insect infestation. Once our team completes the installation, all exposed timber is finished with Smart Seal, a premium sealant that locks in the treatment, repels moisture, and keeps the structure looking sharp year after year.

Installed by Our Own Team, Nationwide

We install garden structures across the whole of Mainland UK using our own in-house teams — not subcontractors, not agency labour, but experienced installers who take pride in every job they complete. We handle the full scope: foundation preparation, full structure erection including the back wall, felt roof installation, Smart Seal timber treatment, and a clean, tidy finish. Your Leviathan is ready to use from day one, with no follow-up work required.

What’s Included as Standard

• Nationwide installation — we install across the whole of Mainland UK using our own in-house teams
• Full professional installation — our team handles everything from groundworks to handover
• Full back wall — complete rear wall included as standard, professionally installed
• Foundation preparation — included as standard, no separate quote required
• All fixings supplied — every bolt, bracket, and fixing needed for a complete, secure installation
• Felt roof supplied and installed — a fully weathertight felt roof covering included in the price and professionally fitted
• Smart Seal timber treatment — all timber sealed with Smart Seal as standard for lasting protection and a premium finish
• Pressure treated timber throughout — factory treated with a 10-year guarantee against rot and insect infestation
• Integrated bar top — built-in bar at 1.14m serving height, included as standard

Optional Upgrades

• Britmet Composite Slate Roof Upgrade — £1,500 — replace the standard felt roof with a premium Britmet composite slate finish. Based on the overall roof area of 6.06m x 3.22m (19.51m²), this upgrade includes supply, full installation, and all associated flashings — a finish virtually indistinguishable from natural slate, engineered to last a lifetime with zero maintenance.
• Timber Decking — £2,000 — complete the space with a professionally installed pressure treated timber deck beneath your bar gazebo. Based on the full footprint of 6.04m x 3.04m (18.36m²), sealed with Smart Seal as standard. The perfect foundation for bar stools, outdoor furniture, and a polished entertaining space.
• Composite Decking Upgrade — upgrade to a premium low-maintenance composite deck that never needs oiling, staining, or treating. Contact us for a price.
• Lighting Installation — add a professionally installed outdoor lighting scheme. From bar-top downlighters to back wall feature lighting, we design and install the full package. Contact us for a price.

Technical Specifications

• Overall External Dimensions: 6.06m x 3.22m (19’ 10" x 10’ 6")
• External Width: 6.04m (19’ 9")
• External Depth: 3.04m (9’ 11")
• Internal Width: 5.57m (18’ 3")
• Internal Depth: 5.57m (18’ 3")
• Overall Height: 3.04m (9’ 11")
• Internal Eaves Height: 2.12m (6’ 11")
• Bar Height: 1.14m (3’ 8")
• Uprights: 120mm x 120mm spruce
• Roof Structure: 19mm tongue and groove boards
• Roof Covering: Felt (included as standard)
• Back Wall: Full rear wall included as standard
• Timber: Spruce, pressure treated
• Timber Finish: Smart Seal applied to all exposed timber as standard
• Guarantee: 10 years on pressure treated timber against rot and insect infestation

Frequently Asked Questions

What is the difference between this and the standard Leviathan Garden Bar?

This version includes a full back wall as standard. The open Leviathan has no rear wall, giving a more open, airy feel. The back wall version creates a more enclosed, sheltered space with a defined rear surface for bar back styling, shelving, screens, and displays — and provides additional wind shelter from the rear.

Is this a Dunster House product?

Yes — the Leviathan Garden Bar Gazebo with Back Wall is a Dunster House product, supplied by Dunster House and fully installed by Bespoke Oak and Slate. You get the quality and guarantee of a Dunster House structure with the peace of mind of a complete, professional installation service.

What does full installation include?

Full installation includes foundation preparation, erection of the complete structure including the back wall, felt roof supply and installation, Smart Seal timber treatment, and all fixings. We leave your garden clean and tidy with a structure that is ready to use from day one. No hidden extras, no separate groundworks quotes.

Do you install across the whole of the UK?

We install across the whole of Mainland UK — from Cornwall to Caithness. Our own in-house installation teams travel nationwide, so wherever your garden is, we can get there.

Can I upgrade the felt roof to a slate finish?

Yes — you can upgrade to a Britmet composite slate roof for £1,500. This includes supply, full installation, and all associated flashings. It is a high-quality, low-maintenance finish that looks virtually identical to natural slate and is engineered to last a lifetime.

Can I add decking and lighting?

Yes to both. We can install a pressure treated timber deck beneath the full footprint (6.04m x 3.04m / 18.36m²) for £2,000, sealed with Smart Seal. Composite decking and full lighting installations are also available — contact us for pricing on both.

What can I do with the back wall?

The back wall gives you a solid, finished surface to work with. Popular options include wall-mounted shelving for bottles and glassware, a bar back mirror, a mounted TV or screen for sport, decorative lighting, and branded signage. Our team can advise on mounting options during the installation.

All sizes quoted are nominal. This is a fully installed product — no DIY assembly required. Supplied by Dunster House, installed by Bespoke Oak and Slate across Mainland UK.