Swallow Raven 20x8 ThermoWood Greenhouse with Installation

EAN: 5060290210164

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At 20ft x 8ft, this is largest and most spacious of the Raven range, constructed using ThermoWood® to maximise its lifespan as a very attractive and productive traditionally styled greenhouse.

Only Swallow use this heat treated timber which has minimal moisture and resin content, so eliminating expansion and shrinkage. Warping and decay are therefore no longer a problem. Another benefit is that the 20ft x 8ft Rven Greenhouse does not require preservatives, and this will save you money and protect the environment.

The greenhouse is easy to enter through double doors even if you have a wheelbarrow or are carrying gardening tools. Inside you'll discover a very productive growing environment with an impressive eight automatic vents creating a wonderful circulation of fresh air 

Toughened glass is fitted as standard as is staging along one side. Options include a high shelf and, if you are keen on re-cycling, a rainwater collection system. A combination shed can also be added as a storage or working area.         

20x8 Raven Greenhouse Features:

  • ThermoWood®: Heat treated Scandinavian timber that's rot and warp resistant
  • Glazing bars: 58mm x 34mm finished size
  • Bottom Tongue & Groove: 12mm boards, 390mm long
  • Doors: Double with mortice lock and aluminium handles
  • Glazing: 3mm toughened safety glass, slid into a groove and sealed with quality silicone
  • Joints: All the cut shapes are jointed with a clear plastic H section
  • Roof Vents: 8 large roof vents with automatic openers
  • Staging: Full length on one side with centre support.
  • Finial: A specially turned apex finial for that classic look.
  • Capping: The ridge and top vents are sealed with a specially machined timber capping.
  • Damp Barrier: A 20mm black PVC section is screwed to the bottom
  • Stainless Steel Nails: Used to fix all tongue and grooved boards
  • Delivery and installation included in price

20x8 Raven Dimensions:

  • Gable width: 2660mm (8ft 9ins) 
  • Length: 6360mm (20ft 10ins)
  • Eaves height: 1730mm (5ft 8ins) 
  • Ridge height: 2660mm (8ft 9ins)
  • Door width: 1200mm (3ft 11ins)
  • Door height: 1980mm (6ft 6ins)

Note: A smaller 18ft x 8ft version of this greenhouse is available.

Optional Extras for your Swallow Greenhouse

Staging along one side is included as standard in your Swallow GB Greenhouse, however, an additional High Level Shelf and Extra Staging on the end to make an L shape is an option. The Hunter Gutter and Downpipe Kit allows you to collect and re-use rainwater - the best water for all plants - this is available as an optional extra below.

Please Note: Imagery may show Kingfisher greenhouses of a different size and with optional extras that must be purchased separately. A suitable flat, level and sturdy base must be prepared before the delivery / Installation date to ensure a hassle free installation.

Select Your Options

Option 1: Would you like your Greenhouse Painted?

  • with Standard ThermoWood® Finish

  • with ThermoWood® Finish in BRACKEN


  • with ThermoWood® Finish in OLIVE


  • with ThermoWood® Finish in EARTH


  • with ThermoWood® Finish in LILY WHITE


Option 2: Would you like to add Extra Staging?

  • with ThermoWood® Extra Staging


Option 3: Would you like to add a High Level Shelf?

  • with ThermoWood® High Shelf


Option 4: Would you like to add a Rainwater System?

  • with Swallow Hunter Rainwater System in WHITE


  • with Swallow Hunter Rainwater System in BLACK


Option 5: Please choose a Delivery option -

  • including Delivery/Installation within Mainland UK

  • including Delivery/Installation within Scotland (North of Grangemouth)


Additional Accessories for your Greenhouse

  • with Ornate Black Door Handle


Delivery Info


Inclusive delivery and installation is limited to UK Mainland excluding areas 15 miles further North of Glasgow. Areas further than this and Offshore Islands would require a custom quote. Please Contact Us here if this is the case.
A suitable, flat and level base must be prepared prior to the delivery and installation.

Price Promise

If you find any of our products in stock and immediately available, at our competitors we will try out best to match the price. We do not charge extra for delivery or installation, but if you find somewhere cheaper, please Contact Us so that we may try to match the price or beat it.


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