Greenhouse Installation Guide


A Good Foundation is Essential

Alton greenhouses, are like other buildings, need ing to be erected on a suitably onstructed base, it is very important that the site is prepared correctly.

We recommend you lay a full concrete base or aternatively a perimeter footing of concrete or paving slabs on which to erect your Alton greenhouse.

It is most important that your  base is level and compacted, the Alton Heritage greenhouses have  concrete base kerbs and the Evolution range has a steel base, a stable, level base on which to stand the base provided is still essential for your Alton greenhouse, this helps to prevent the wood from coming into contact with wet soil and helps to prevent decay and helps overcome any problems opening and closing the door.

We are an authorised Alton retailer and we will usually be able to help you with advice or even arrange to have a prepared base laid for you.

Barretts wil most likely be able to provide you with details of a professional Alton Installer if you don’t want to erect it your new Alton greenhouse yourself.

The documents in the link below will also prove useful:

Greenhouse Foundation detail

Alton Base dimensions


Self Assembly

Most of your Alton Greenhouse sections will arrive pre-glazed, making it easy to install.
Instructions for various Alton greenhouses can be found in the links below.
Full instructions will also be supplied with your Alton greenhouse.


Amateur Greenhouses:

8’0” width
10’0” width

Octagonal Greenhouses:

6’ x 6’
6’ x 8’6”
8’6” x 8’6”
8’6” x 11’