Gabriel Ash Classic 6 ft x 18 ft Greenhouse

Product Code: CG0309

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With a mammoth internal space and superior crafting quality, the Gabriel Ash 6ft x 18ft classic greenhouse is crafted using traditional and modern methods, offering an awe-inspiring garden growhouse.

Gabriel Ash's classic range offers the ultimate in timber greenhouses, blending the traditional look of wood with the advancements of metal. With a huge eighteen-foot length, this greenhouses offers a magnificent growing space for all of your favourite flowers, fruits, vegetables and herbs.

The extra long frame will be expertly handmade after ordering, using western red cedar, a perfectly fitting wood type for outdoor use as it carries naturally occurring oils to protect it against rot and insects. Inside the structure is one of the main areas where modern meets tradition, with the addition of a discreet powder-coated aluminium A-frame support that's integrated to the inside of the cedar frame, and externally, metal glazing bar capping on the roof section, offering substantial structural integrity unseen in other timber greenhouse brands.

Filled with practical accessories as standard, the centre of the apex roof has a built-in ventilation system, with roof ridge vents that open and close automatically as and when the temperature outside changes, giving autonomous air flow. Additionally, there's six manually openable side windows for when you require additional airflow control.

Glazing is supplied as toughened safety glass, giving strength and peace of mind compared to cheaper and less-safe horticultural glass as found with cheaper brands. And to top it off, aluminium roof gutters with matching downpipes allow for easy rain water capture into a suitable water butt or two.

Buy this Gabriel Ash classic 6ft x 18ft greenhouse and it'll be expertly handmade in Cheltenham, England, with free delivery throughout mainland UK once crafted.

Note: Product imagery is for illustration and may depict a different size, along with non-standard accessories.

Key Features

  • 6ft Wide by 18ft Deep Gabriel Ash Classic Greenhouse
  • Expertly Handmade To Order In England, Mixing Modern & Traditional Materials
  • Crafted from PEFC-Certified Canadian Western Red Cedar (Thuja Plicata)
  • Features a Metal Internal A-Frame & Roof Ridge For Optimal Strength
  • Features a Metal Base Plinth Offering Flush Fitting & Anchoring
  • Features Metal Bar Capping Securing the Roof Glazing
  • Features Metal Side Guttering with Downpipe
  • Includes Toughened Safety Glass Throughout
  • Includes Automatic Roof Ventilation System
  • Includes Six Openable Side Windows 
  • All Metal Features Are Powder-Coated Aluminium in a Grey-Tone Finish
  • Highest Quality Solid Brass & Stainless Steel Fittings & Fixtures
  • 12-Year Warranty Against Manufacturing Defects
  • Home Delivered In Pre-Built Sections For Easy Assembly
    - Alternatively, Select Our Optional Installation Service Available Below


Base Depth: 534.6cm (17ft 6in)
Base Width: 185.4cm (6ft 1in)
Brand: Gabriel Ash
Door Type: Single
Door Width: 64.5cm (2ft 1in)
External Depth: 537.6cm (17ft 8in)
External Width: 188.4cm (6ft 2in)
Glazing Thickness: 3mm
Glazing Type: Toughened Safety Glass
Height To Eaves: 155.8cm (5ft 1in)
Height To Ridge: 225.7cm (7ft 5in)
Model: CG0309
Nominal Size: 6x18
Timber: Western Red Cedar


Select Your Options

Staging & Shelving

18ft Shelf

18ft Shelf (SH8009A)

3-slat shelf and brackets made from solid western red cedar. Suitable to fit the full length on one side of a 18ft long greenhouse. Tip: Order two sets of shelves if you require one on both sides of your greenhouse.
18ft Staging

18ft Staging (ST8009A)

5-slat staging made from solid western red cedar. Suitable to fit the full length on one side of a 18ft long greenhouse. Tip: Order two sets of staging if you require one on both sides of your greenhouse.

Additional Accessories

Louvre Vent Window

Louvre Vent Window (AC1501)

Designed to replace an existing pane of glass in the side of your greenhouse to allow additional ventilation. Usually placed at the end of the greenhouse, opposite the door, to create airflow from the door to the rear.
Roller Blind Set

Roller Blind Set (BC09)

Each blind has a spring-loaded roller and hard-wearing fabric allowing 60% light transmission. A single set of blinds covers one side of a 18ft length greenhouse roof, order two sets to cover both sides of the roof.
Cedar Board Panel

Cedar Board Panel (BP470)

A cedar board panel designed to easily be swapped out with a lower pane of glass. Used for design preference or to protect the bottom of the greenhouse from lawn mowers etc. Sold as per single panel, change the Qty to your required amount.
Water Butt Connecting Kit

Water Butt Connecting Kit (WB1201)

A kit for connecting your greenhouse guttering to a generic water butt.
Standard Water Butt

Standard Water Butt (WB1001)

A 100-litre capacity plastic water butt along with stand and integral tap. Requires the water butt connecting kit accessory.
Cedar Water Butt

Cedar Water Butt (WB2001-3)

A stunning cedar timber water butt stand with a 100-litre capacity slimline water butt inside. Supplied with its own integral tap and connecting kit.

Installation Services

Installation of Greenhouse

Installation of Greenhouse

Your greenhouse handmade to order, delivered to your home and fully installed by the Gabriel Ash installer team.
Note: Ground works and levelling not included. A pre-prepared base area is required before delivery.
💡Full installation terms can be found here.
Installation of Additional Accessory

Installation of Additional Accessory

Some optional accessories will unfortunately incur an additional installation charge if installation of the greenhouse has been selected.
Chargeable accessories for installation include: Shelving, Staging, Roller Blinds and Water Butts. Any other accessories not listed will not attract an accessory installation fee and will be inclusive.
Change the Qty below to the amount of additional chargeable accessories ordered.

Your Selected Options:

£8,299.99 inc. VAT

Delivery Information

See our delivery, installation and made-to-order information for when buying a Gabriel Ash greenhouse online with us.

Inclusive Delivery within Mainland England, Wales and Scotland.
Our Gabriel Ash greenhouse range is expertly handmade to order in England after ordering, and so the current crafting and delivery lead-time is: 20 Working Days (1 Month).
Delivery to non-mainland delivery areas such as Scotland and Highlands will incur increased delivery times due to the additional distance.

Additional delivery charges will apply for delivery to; Scottish Islands, Isle of Man, Isle of Wight, Jersey, Guernsey and Northern Ireland.
Unfortunately, we can't ship this product range to the Republic of Ireland.

Installation Services
Installation services may be purchasable on some greenhouse products and is limited to domestic addresses only (no allotments) within mainland England and Wales, but excludes Scotland, Scottish Highlands, Northern Ireland, and Offshore Islands. Installation is normally completed at the same time as the delivery of your greenhouse and is completed by Gabriel Ash's installer team. Please find our Installation Terms and Preparation Checklist here.

Bespoke Made-To-Order Procedure
This product range is handmade to order on an order-by-order basis, therefore is exempt from our usual cancellation and returns policy. Any cancellations after your order has started production may not be able to be cancelled or may be subject to cancellation charges. Although a very rare occurrence, this does not affect any orders that arrive damaged or faulty, whereby our normal terms on receiving a faulty product will apply. 

Vehicles We Use
Items will be delivered on larger lorries which can get to most places it's typically, a 7.5 ton lorry which is about the size of a dustbin lorry, this will depend on the item that is being delivered and should you have any concerns with restricted access to your property we ask you to contact us prior to placing an order.

Unloading Of Your Delivery
For delivery-only orders: due to the large nature of this product, delivery will be made to the front of the property to the nearest location. Delivery drivers will not carry these items inside your home or back garden. When the item is delivered on a pallet, the pallet and packaging are non-returnable. Goods can only be maneuvered on a flat and level surface (i.e. not a gravel driveway) by a pallet truck. On some occasions the driver will split the package to assist with manoeuvring of the item. Once you are happy, we will ask you to check the condition of the goods and sign for the delivery.

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