Alton Evolution TWELVE Greenhouse

Alton Evolution TWELVE

Alton Evolution 12ft 9in wide x 14ft 9in long ( 3.88m x 4.50m )

I've run out of superlatives to describe the new Alton Evolution !

Just come and take a look at one of our display models at one of our display centres which are located throughout the UK.   There's a link on this page so you can check where you can see the nearest Evolution and, although it may not be the exact size you want, it will give you a very good idea of what the Evolution is all about. We staff our sites 363 days a year so there's always an expert on hand to discuss your greenhouse project with you.

Evolution Twelve detail

Standard features of the Evolution Twelve are Double sliding doors, cedar external capping, toughened safety glass, internal cantilever cedar eaves and ridge braces, moss green finish aluminium components ( eaves, base and door top rail ), downpipe set, low level entry threshold, 6 blade louvre window(s), automatic roof vent(s).... so much included as standard.

Options include the staging and shelving as pictured, automatic louvre openers, partitions, internal blinds, and additional roof and/or louvre vents.

In other words, we would be delighted to build up the specification of your Evolution greenhouse to meet your exact requirements !

Alton Evolution Guttering and Aluminium Bar Capping System

The Alton Evolution Guttering is an attractive moss green finish aluminium extrusion and is supplied with a downpipe for each side of the greenhouse.  

The external capping over the glazing is showing the optional green aluminium bar capping which is totally maintenance free ( except for a bit of a wash down every now and again ).

In particular please note how the toughened safety glass extends beyond the cedar eaves bar, discharging water directly into the gutters rather than allowing it to run across the cedar itself.

Alton Evolution Cedar Bar Capping System

This picture shows the standard external cedar bar capping which is supplied with each Evolution unless you opt for the green aluminium bar capping. It is screwed in place and holds the glass firmly and securely.

Alton Evolution Aluminium Staging

Alton Evolution Aluminium Staging widths vary according to the model you choose :

Evolution Five : 20" wide 3 slat staging, 12" wide 2 slat shelf

Evolution Six, Eight, Ten and Twelve : 25" wide 4 slat staging, 12" wide 2 slat shelf

It's maintenance free and blends beautifully with the cedar framework.

Alton Evolution Staging and Shelving

Alton Evolution staging and shelving is finished in moss green powder coated finish and just needs a wipe down to keep it clean and tidy. The cantilever brackets leave room beneath the staging for storage rather than having staging legs in the way.

Alton Evolution Framework

The Evolution has been developed in the UK in our fully equipped workshop with the latest technology.  We have to confess though that one or two of the machines have been reliably making other Alton Greenhouses for over 40 years !

The jointing system is incredibly strong and makes the Evolution rock solid once assembled... so it will cope with almost anything the British weather cares to throw at it !

Constructed in long -life cedar sections these greenhouses do not compromise by using thinner glazing bars; they are machined from 44mm x 44mm cedar  (and 44mm x 69mm sections in places )

Mortice and Tenon Joints

These are the reason behind the superior strength of the Evolution.

You would expect any timber greenhouse to be built this way but in fact many others simply butt joint and nail the components together.

Alton Evolution Base

Aluminium is rot proof, maintenance free, rigid and easily assembled ... that's just 4 reasons why it makes an ideal greenhouse base.

Normally you won't find it used as a base on cedar greenhouses because it doesn't match up with the rest of the building.

The Evolution is a special case ; because the components in the areas where the weather or watering takes its toll ( the eaves, base, staging, shelving, door support track ) are all constructed in aluminium, then powder coated for life with an attractive moss green colour, the base doesn't look out of place.  Add to that the convenience of setting the greenhouse up in the first place ( rather than trying to lay out concrete blocks for instance ) and you'll see why this is so popular.

Downpipes

A downpipe is provided for each side. There's a 45 degree bend suppied too, either to discharge water at ground level or to create a joint higher up the pipe to divert water to a barrel.

Low Threshold

A single door is standard with the Evolution Five and Six.  The Eight, Ten and Twelve have double doors.  All sizes have the low threshold shown in the picture.

This makes it easy to wheel a barrow in and out or provide access for wheelchairs and pushchairs.

The single door access width is 560mm ( 22" )

Ridge bracing, blinds, autovents

The wider Evolution models have eaves and ridge braces in the following quantities :

Evolution Eight : 4 eaves braces and 2 ridge braces on the 10 & 12 ft long. 8ft extension also has the same: 4 & 2

Evolution Ten and Twelve : Eaves and ridge braces on every bar (and thicker roof bars). From this you will realise that the photo is one of these ! Please note the quality of the jointing from the picture.

Also in the picture are two roof blinds. You can see the black cartridges that the blinds unwind from so they are neat and easy to retract when not required.

The picture also illustrates that each roof vent is supplied with an automatic opener. Without these you can get to your greenhouse even early in the morning and find your plants keeling over from the heat. The autovent is a wax filled cylinder which forces a piston to lift the vent as the cylinder heats. They are adjustable and therefore a very effective way of maintaining an appropriate temperature inside your greenhouse.

Internal roof blinds for Alton models

This example of Alton's internal roof blinds shows the degree of shading achieved to good effect.

The blinds retract on a sprung top rail.

GBC...here to help you

GBC have branches all over the country displaying our buildings and offering help and advice to our customers.
Established in 1986, we are real people with our feet on the ground and with a real investment in and commitment to our buildings.
We are not an anonymous internet site.
Please give us the opportunity to assist you in buying the building of your choice ... contact us by freephone, email, our live website chat or call our branches direct. You will find all of these contact opportunities in this website. We look forward to speaking to you