£2699 with Autumn discount
The discount will automatically be applied to your basket

Alton Evolution Octagonal Cedar Greenhouse
9ft2 wide (2800mm) x 9ft2 long (2800mm)

 £3,999.00   Now £2,999.00
Product id: 8980
  • Western red cedar cladding
  • Western Red Cedar
  • Toughened safety glass (full sheet)
  • Free 10 Year Guarantee
  • 2 x roof vents with Automatic opening
  • 2 x Louvre vents
  • Gutter and a single down pipe including stop end (for greenhouse)
  • High eaves
  • Low level threshold
  • Hinged single door
  • Screw in cedar bar capping system
  • Installation available for a fee

£2,999.00

  • Alton Additional Evolution Octagonal Louvre high level

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    £149.00
    Alton Additional Evolution Octagonal Louvre high level

    Replaces a 795x1050 pane of glass in an Alton Evolution Octagonal greenhouse.

  • Alton Bar Capping set (Moss Green) for Evolution Octagonal 99

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    £119.00
    Alton Bar Capping set (Moss Green) for Evolution Octagonal 99

    Replaces the cedar bar capping holding in the glass. Powdercoated aluminium reduces maintenance and extends the life of the building.

  • Alton Evolution louvre opener

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    £46.00
    Alton Evolution louvre opener

    Automatic attachment for a Louvre vent, fits most louvres.  Its fully adjustable to open over a range of temperatures.

    Some drilling is required to fit.

  • Alton Evolution Octagonal aluminium shelves x 2 for 9ft deep models

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    £169.00
    Alton Evolution Octagonal aluminium shelves x 2 for 9ft deep models

    Spans the rear of the greenhouse.

  • Alton Evolution Octagonal Double door upgrade

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    £362.00
    Alton Evolution Octagonal Double door upgrade

    Upgrade your single door to a double door option.

    The right hand door, looking from the outside, is the slave door - the one that opens day to day.

    The left hand door can be opened by undoing shoot bolts top and bottom.

  • Alton Evolution Octagonal Louvre in cladding

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    £149.00
    Alton Evolution Octagonal Louvre in cladding

    Replaces the lower cladding in an Alton Evolution Octagonal greenhouse.

  • Alton Evolution Octagonal shelf infill for 9ft long

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    £75.00
    Alton Evolution Octagonal shelf infill for 9ft long

    Spans the rear of the greenhouse.

  • Alton Evolution Octagonal staging 2 sides + infill for 9x9

    More information
    £499.00
    Alton Evolution Octagonal staging 2 sides + infill for 9x9

    Optional aluminium staging two sides & rear finished in Moss powder coating

  • Osmo Oil Osmo UV Protection Oil Extra 2.5l

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    £65.00
    Osmo Oil Osmo UV Protection Oil Extra 2.5l

    One of the most regular questions that we get asked is how to care for your new summerhouse - in particular what to treat it with.

    In many ways, this can be a matter of personal opinion: Some people prefer to let the cedar fade down to its natural silvery-grey colour. A new building will begin this mellowing process as soon as it is assembled and will be noticeable after just a few weeks and will be quite silver after a year. If you like this mellow look then you can re-apply the same treatment that we use in the factory - a clear Barrattine wood protector formula every couple of years. This helps to prolong the life of the wood and reduces staining but does not alter the mellowing process. This treatment is easy to just use when needed

    If you would really prefer to try and keep the original cedar colour in the wood then we can recommend using this Osmo oil product on new Summerhouses and Greenhouses as it prolongs the colour of new cedar by protecting it from Uv light. It is quite a viscous product so needs to be applied with a brush and will need 2-3 coats for best results.

    This high-quality product is in effect a sun block for your wooden building. A 2.5l tin will be enough to coat a 6’x8’ summerhouse building approximately four times. Due to the effectiveness of this product, your building may only need treating every couple of years. Only the exterior of your building will require treating.

    IMPORTANT: We highly recommend using this product a couple of weeks after construction. This will ensure that the cedar has had time to air-dry but has not yet started to fade. We do not recommend treating the building immediately after it is erected.

    Osmo uv-protection-oil extra is a satin, Clear finish for exterior. It is based on natural oils, is microporous, and does not crack, flake, peel or blister. Osmo uv-protection-oil extra prolongs the renovation time significantly. As a stand alone finish, with two coats, It prolongs the greying process on vertical surfaces by up-protection factor 12 compared to untreated wood. The finish contains active ingredients which protect it from mould, algae and fungal attack. Easy to renew, no sanding or primer necessary. Easy to apply, will not dry during application.


£2,999.00
Alton £2699 with Autumn discount
The discount will automatically be applied to your basket

A new specification for 2019

Made from the same warm-hued western red cedar as the rest of the Evolution range, with the same rot resistant properties, this spacious 6x9 high eaves model provides the perfect growing environment. With its 2 high-level side louvre vents and 2 automatic roof vents (which open and close with the changing temperature), it provides excellent ventilation, drawing fresh cool air from below, and pushing out stale warm air above.

Alton have made a number of improvements to their Octagonal models. Gone is the old timber staging and shelving, and replaced by sleek aluminium, which is powder-coated in a mellow Moss Green colour, giving your greenhouse real contemporary styling.  Also, powder coated aluminium guttering, in the same Moss Green, has replaced the old PVC.

In keeping with the rest of the Evolution range, the Octagonals now come with an integral, powder coated, metal base plinth, and have the option to upgrade from cedar bar capping to powder coated aluminium, making your greenhouse virtually maintenance-free.

Some things haven't changed however, as the Octagonal models still maintain the same strong cedar frame, lockable hinged door with low-level threshold, and toughened safety glass throughout.

Octagonal greenhouse dimensions diagram
  • A = Base width: 2,800mm (9ft2).
  • B = Length: 2,800mm (9ft2).
  • C = Eaves height: 1,989mm (6ft6).
  • D = Ridge height: 2,948mm (9ft8).
  • E = Door width: 649mm (2ft1).
  • F = Door height: 1,810mm (5ft11).
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File Type: PDF

Alton Evo 9x9 Octagonal Instructions - Click here to view

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File Type: PDF

Alton Evo Octagonal 9x9 Base Plan - Click here to view

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File Type: PDF

Alton Evo Octagonal 9x9 Dimensions drawing - Click here to view

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File Type: PDF

Evo Octagonal Double Door Instructions - Click here to view

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File Type: PDF

Evo Octagonal Optional Extras Instructions - Click here to view

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Delivery of this greenhouse to Mainland England and Wales is FREE, parts of Scotland may be subject to a small charge. Delivery costs will be calculated and displayed at checkout before any payment is required

You will be contacted with a delivery date when your greenhouse is ready. This greenhouse is delivered straight from the factory on dedicated transport.

Please write in the comments box at checkout any dates (holidays etc.) you would like us to avoid.

Delivery to Northern Ireland may take longer.

About The Greenhouse People

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The Greenhouse People offer a 30-day returns policy. You are welcome to return any item, no quibbles, no arguments.

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