ALU Concept Relax 70 A | 5.78m x 5.08m Corner Garden Room | Aluminium Windows | Fully Installed | Mainland UK

ALU Concept Relax 70 A | 5.78m x 5.08m Corner Garden Room | Aluminium Windows & Terrace | Fully Installed Across Mainland UK

The ALU Concept Relax 70 A is a premium corner garden room that redefines what an outdoor building can be. With 14.37m² of indoor floor space, a 12.6m² covered terrace, 70mm slow-grown Nordic spruce massive log construction, aluminium-framed double-glazed sliding doors, and a generous overhanging flat roof, this is a building that brings the outside in — panoramic garden views, reduced outdoor noise, and a space that works beautifully in every season.

The corner configuration and full-width sliding door at 326cm x 206cm opens the entire front elevation to the garden, connecting the interior to the terrace and the landscape beyond without a single visual barrier. Whether you are using it as a pool room, a garden office, a guest room, a studio, or simply the best seat in the house for watching your garden through the seasons, the ALU Concept Relax 70 A delivers the space, the light, and the quality to do it properly.

The price shown includes the full supply and professional installation of your ALU Concept Relax 70 A anywhere on Mainland UK, including the base preparation and installation and the complete construction of the structure. There are no hidden costs and no separate groundworks quotes. What you see is what you pay.

For locations outside of Mainland UK — including islands and certain remote areas — please contact us for a tailored delivery and installation price before ordering.

Engineered for the Long Term

The ALU Concept Relax 70 A is built to a specification that sets it apart from standard garden buildings. 70mm slow-grown Nordic spruce massive logs with 4-way corner millings and double tongue-and-groove jointing deliver an exceptionally high level of wind and rain tightness — a construction detail that makes a genuine difference to comfort and longevity. Nordic spruce is chosen for a reason: grown through long cold winters and short summers, the wood develops very tight annual rings that make it particularly hard, dense, and resistant to the elements.

Production takes place on modern computer-controlled machinery, ensuring a precise, snug fit across every component of the kit. The result is a building that carries a 10-year structural warranty — a reflection of the confidence we and the manufacturer place in the quality of the materials and the build process.

The overhanging flat roof provides practical shelter over the terrace — useful for snow clearance and keeping the terrace usable in light rain. The terrace itself adds 12.6m² of covered outdoor space, extending the usable footprint of the building significantly beyond the indoor area.

Key Features

• 14.37m² indoor floor area — 5.78m x 5.08m base footprint
• 12.6m² covered terrace — included
• Corner garden room configuration — panoramic views, maximum light
• Flat roof — ridge height 264cm — with generous overhanging canopy
• Roof overhangs: front canopy 110cm, terrace 173cm left / 83cm front, side 200cm left / 20cm right, rear 20cm
• 70mm slow-grown Nordic spruce massive logs — 4-way corner millings, double tongue-and-groove
• Aluminium-framed sliding door — 326cm x 206cm — double-glazed tempered glass
• Double-glazed tempered glass throughout
• Floor included as standard
• Natural untreated finish — ready to treat or stain to your preference
• 10-year structural warranty
• SKU: GH7026231
• Base preparation and installation — included. No separate groundworks quote.
• Full structural build — included. Supply and construction of the complete building as part of the price.
• Full installation on Mainland UK — included. Professionally installed by our own team.

What Is Included in the Price?

• Supply and delivery of your ALU Concept Relax 70 A
• Base preparation and installation — included. Thermal blocks, concrete slab, gravel pad, crawl-space, wooden post foundation, or paving stones — assessed and installed as part of the price. No separate groundworks quote.
• Full construction of the structure — included. The complete building, built and installed by our team.
• Floor — included as standard
• Terrace — included as standard
• Aluminium sliding door with double-glazed tempered glass — included
• Site clean-up and handover

For locations outside of Mainland UK, please contact us for a delivery and installation price before ordering.

Optional Upgrades

The following upgrades are available at an additional cost. All upgrade prices include supply and installation.

For all specialist fit-out work — including electrical packages, internal lining, plastering, bar installation, and any other bespoke requirements — these are priced entirely separately based on your specific needs. We can discuss and quote for these directly, or you are welcome to bring in your own trades for any specialist work. Contact us to discuss your requirements.

Product Specifications

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Frequently Asked Questions

Does the price include the base and the full build?

Yes. The price includes base preparation and installation, and the complete construction of the structure. There are no hidden costs and no separate groundworks quotes.

Is the floor included? What about the terrace?

Yes — both the floor and the terrace (12.6m²) are included as standard.

What foundation types are available?

We can install on thermal blocks, a concrete slab, a gravel pad, crawl-space, wooden post foundation, or paving stones. The most appropriate option is assessed on a site-by-site basis and installed as part of the price.

Do you install outside of Mainland UK?

We install across Mainland UK as standard. For island locations and areas outside of Mainland UK, please contact us before ordering and we will provide a tailored delivery and installation price.

Can I add insulation?

Yes — insulation is available as an optional upgrade, with all prices including supply and installation. Floor insulation is £630, a roof insulation package is £2,079, wall insulation is £1,350, or the full floor, roof, and wall insulation package is £4,275. Please contact us to discuss the best option for your intended use.

Can I upgrade the roof covering?

Yes — an EPDM rubber roof covering upgrade is available for £2,000. For a flat roof, EPDM is the right long-term choice — fully fitted, seamless, and virtually maintenance-free.

What about electrics, internal lining, plastering, and other specialist work?

All specialist fit-out work is priced entirely separately based on your specific requirements. We can discuss and quote for these directly, or you are welcome to bring in your own trades for any specialist work. Contact us to talk through what you need.

What is the 10-year warranty?

The ALU Concept Relax 70 A carries a 10-year structural warranty, reflecting the quality of the slow-grown Nordic spruce timber and the precision manufacturing process. Please contact us for full warranty terms and conditions.

What does the overhanging roof do?

The generous roof overhangs — up to 200cm on the left side and 110cm at the front canopy — provide practical shelter over the terrace, keeping it usable in light rain and helping with snow clearance in winter. It also shades the glazing in summer, reducing solar gain inside the building.

Do I need planning permission?

In many cases a building of this size will fall within Permitted Development rights for residential properties in England and Wales, provided it is used as an ancillary garden building, is sited within the curtilage of a dwelling house, and does not cover more than 50% of the garden area. We always recommend confirming with your local planning authority before ordering.

What does the natural untreated finish mean?

The building is supplied in its natural Nordic spruce finish — untreated and ready for you to apply your preferred exterior stain, oil, or treatment. We can also supply and apply an exterior treatment as an optional upgrade.

How long does installation take?

Typically two to three days, depending on site conditions and foundation type. We will confirm the installation schedule with you in advance.

How long does delivery take after ordering?

Typically 6 to 8 weeks from order confirmation. Please contact us if you have a specific deadline.