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Halls Magnum 812 Silver 8' x 12' Glass Greenhouse

Although this is not the largest Halls Magnum 812 Silver Aluminium & H-Glass 8' x 12' Greenhouse, you are treated to a higher ridge & eaves, creati...more

This Halls Magnum 812 Silver 8' x 12' Glass Greenhouse has all the space a gardener could possibly need to grow their own. Although this is not the largest greenhouse we do have from Halls's Magnum greenhouse range, you are treated to a higher ridge & eaves, creating a very comfortable and spacious 9.3m² of growing space to be accessed easily by its smooth sliding double doors.

Standard 3mm horticultural glass is supplied with this particular model of Halls Magnum greenhouse that is easy to clip-in and replace if necessary. With every Magnum 12 x 8 greenhouse you are supplied with four roof vents and integral guttering, the mill silver aluminium frames joints of this metal garden greenhouse are have been cast at both the eaves and the durable box-section ridge.

There are also many optional extras to consider with the Magnum large greenhouse from the drop down menus to create the greenhouse garden building you require. You will also find this Halls Magnum 812 Silver 8' x 12' Glass Greenhouse with toughened glazing and a powder coated green frame elsewhere on our site. 

** FREE TWO TIER STAGING ** (Worth up to £94!)

With any Halls greenhouse purchased during September - November
(Staging will be colour matched to selected greenhouse) 

Halls Magnum 812 Silver 8' x 12' Glass Greenhouse Dimenmsions:

  • Length: 3.84m
  • Width: 2.57m
  • Eaves Height: 1.48m
  • Ridge Height: 2.58m
  • Growing Area: 9.3m²
  • Door Opening: 1200mm
  • Roof Vents: 4
  • Glazing: Horticoltural Glass 3mm (short pane)

Halls Magnum 812 Silver 8' x 12' Glass Greenhouse Features:

  • Wide double doors for easier access
  • Increased height
  • Easy clip-in glazing
  • Smooth single sliding door
  • Integral roof ventilation

Additional Options: (please select these from the drop down menu/s) We will be happy to provide you any further information upon request in relation to these greenhouse options:

  1. Base - As pictured in the main image
  2. Installation - *Please see below
  3. Staging - Aluminium, potting benches, wire trays, aluminium shelving, seed trays and luxury staging
  4. Louvre - Bladed, glass or poly glazed
  5. Roof Vent - 6' & 8' available
  6. Window Opener - Manual and auto
  7. Down Pipes -  6' & 8' rainwater kits are available
  8. Shading/insulation - 8ft & 12ft shading screens
  9. Greenhouse Heater - Junior, senior or maxi heating
  10. Coldframe - 4x2 or 4x3 in Horticultural, toughened or polypropelene glazing options
  11. Watering System - Vanlet automatic irrigation unit


Delivery Notes:

  1. All Orders will be Delivered within 21 - 28 Days from receipt of order
  2. All customers will be contacted 48 hours prior to delivery to provide AM / PM delivery date
  3. Delivery charges to all other Offshore and Scottish Islands locations require individual quotes (please call customer services before ordering)


  • Installation completed within 10 working days from delivery of greenhouse
  • Ensure ground location is of firm and level footing with any additional materials being pre-laid in readiness (example Paving Slabs etc.)
  • Area prepared should be free from any obstruction (example Manhole covers etc.)
  • Area should be free from overhanging obstacles (example Tree branches, Power lines etc.)
  • The area should allow the building to be installed providing access to all sides
  • Please ensure you have pre-checked your garden building 72hrs before your installation reporting any problems to our Customer Services 
  • Any additional accessories to be installed at the same time will be chargeable at a rate of £24.95 inclusive of VAT. If you wish to to have a lot of accessories installed? Please call our customer services department who will be able to give you a tailored quote.

IMPORTANT NOTICE: Customers should report any problems relating to the product within 24 hours from receipt to our customer service department.

delivery van
Usually 21 - 28 working days
Magnum 812 Silver Glazing
  • Horticultural - £1,022.00
  • Toughened - £1,148.99
Total Price
Seen it cheaper? We'd love for you to call or email us so we can try and beat it for you.
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delivery van
Usually 21 - 28 working days
Optional Extras

Silver Base

£178.00 each


Green Base

£258.00 each

2 Tier Green Staging

2 Tier Green Staging

£107.35 each

Installation Please

Installation Please

£449.00 each


Down Pipe

£27.10 each

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