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£20 OFF Greenhouses!

Use code SUMMER20 at checkout min order £549 (Greenhouses)

8x4 Access Large Coldframe

8x4 Access Large Coldframe - Toughened Glass
FREE 7-10 Days Alloy ⛟ Click to enlarge - For illustration purposes.
Access 8x4 Coldframe with Toughened Glass
Access 8x4 Coldframe with Toughened Glass
Greenhouse Size Diagram

Quick Code: P173753

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  • 7ft 8" wide x 3ft 11" deep
  • 3mm Toughened Safety Glass
  • Silver Aluminium Frame
  • Sliding Doors Front and Top
  • Optional Raised Wooden Frame Available
  • UK Manufactured
  • 25 Year Warranty
Greenhouse Size Diagram

Coldframe Dimensions

A: Coldframe depth

1210mm (3′ 11″)

B: Coldframe width

2360mm (7′ 8″)

C: height

820mm (2′ 8″)

Minimum Base Size

1210mm (3′ 11″) x 2360mm (7′ 8″)

Customise your Greenhouse

More Sizes:

+21 more sizes, click to see all

Add Select your Optional Accessories?

Roof Handles
+ £20

This pack of handles will improve ease of access through the top glass panels.

Automatic Louvre Vent
+ £115

Piece of mind for if you are away from home.

Mist Watering System
+ £59

Commercial quality water misting kit that is perfect for even the smallest seedlings

Coldframe Shade Kit
+ £45

Provide shade in the Summer and Insulation in the Winter. Price is for 1 shade, 4 are required for the whole of the Coldframe.

Qty 1
3 Tier Raised Wooden Frame
+ £235

Tanalised Raised Frame helps warm the soil and is great for taller plants.3 Tier 15"/ 36cm Height Frame

Twin Shelf Kit
+ £49

1 Deep and 1 Narrow shelf. 4 Kits can be fitted in this model.

Qty 1

Select your Optional Accessories information

Roof Handles - £20.00
Roof Handles

This pack of handles will improve ease of access through the top glass panels.

Automatic Louvre Vent - £115.00
Automatic Louvre Vent

Piece of mind for if you are away from home.

Mist Watering System - £59.00
Mist Watering System

Commercial quality water misting kit that is perfect for even the smallest seedlings

Coldframe Shade Kit - £45.00
Coldframe Shade Kit

Provide shade in the Summer and Insulation in the Winter. Price is for 1 shade, 4 are required for the whole of the Coldframe.

3 Tier Raised Wooden Frame - £235.00
3 Tier Raised Wooden Frame

Tanalised Raised Frame helps warm the soil and is great for taller plants.3 Tier 15"/ 36cm Height Frame

Twin Shelf Kit - £49.00
Twin Shelf Kit

1 Deep and 1 Narrow shelf. 4 Kits can be fitted in this model.

The 8x4 Access Aluminium Large Coldframe is a great way to extend the growing season and protect your plants from harsh weather conditions. Perfect for use all year round, the Cold Frame can be placed directly onto the soil or on a raised base, providing shelter from strong winds and harsh weather conditions. In the spring, when temperatures start to rise, the Cold Frame can also be used to house tender young plants, acting as an intermediary stage between the warm conditions of a greenhouse and the cooler environment of a garden.

This Large Access 8x4 Coldframe is made from aluminium, with a 25 year framework guarantee. It is glazed with 3mm toughened safety glass, and has sliding side and top panels for easy access. A full range of options are available below including Shelving, Louvre and Misting Kit.

  • 2360mm (7ft 9") Wide Aluminium Cold Frame - Compact Freestanding Design.
  • UK Manufactured Greenhouse
  • Aluminum Frame
  • 3mm Toughened Safety Glazing - Long pane.
  • Sliding Front and Roof panels. - Excellent Ventilation.
  • Removable Roof Panels - Adapts as Plants Grow!
  • Weather-proof Design - To withstand our Glorius Climate!
  • Full Range of Options Available. - Customisable.
  • Image shows Optional Raised Bed.
  • Industry Leading 25 Year Warranty.

This Greenhouse is currently being delivered: 7-10 Days for Alloy finish frames, 6-12 Weeks for coloured finishes, 2-3 Weeks for Raised Beds.

Greenhouse Size Diagram

Coldframe Dimensions

A: Coldframe depth

1210mm (3′ 11″)

B: Coldframe width

2360mm (7′ 8″)

C: height

820mm (2′ 8″)

Minimum Base Size

1210mm (3′ 11″) x 2360mm (7′ 8″)

Frequently Asked Questions

  • Can I choose which side the louvre and watering system go?

    Yes, you have flexibility in positioning these features. The watering system connection can be fitted on either end for Classic models, while the louvre vent typically fits on the left but can be adapted for the right side.

  • Does the mist spray affect the wall?

    The mist spray uses less water than natural rainfall would on the wall, so it shouldn't cause any issues. The greenhouse actually provides some protection to the wall from the elements.

  • Can I automate the watering?

    Absolutely! We offer a hose end timer that can automate your watering system, perfect for when you're away or busy.

  • How does the louvre vent work?

    The louvre vent is a clever, sun-powered device that doesn't require electricity. It uses an oil-filled cylinder that expands with heat to open the vent and contracts to close it as temperatures drop.

  • Is the greenhouse easy to build?

    Yes, our greenhouses are designed for easy assembly. We provide clear, comprehensive instruction booklets with step-by-step guides to make the process straightforward.

  • Do I need to fix the greenhouse to a wall?

    While walls are ideal for their heat-absorbing properties, it's not necessary. We offer glass-backed models for freestanding options if you don't have a suitable wall available.

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Brenda W
2x3 Access Harlow Mini Lean To Greenhouse Toughened Glass
Nice little potting shed/greenhouse just what I wanted. Slightly disappointed with the size of the two shelves - think they could have been a bit wider to accommodate plant trays a bit more safely. Need to save up for the back glass as I feel it might need it in the winter and give it a bit more stability. Very helpful company to deal with as we had to put the delivery date back a couple of weeks due to my husband having an operation.
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Julia E
1x3 Access Westminster Lean To Greenhouse Toughened Glass
I needed a very small greenhouse, but wanted a proper one. This is absolutely perfect. I can cram loads of seeds and seedlings in, then temporarily remove shelves as they grow bigger. I am absolutely delighted. The company were very helpful too. It was slightly trickier than a one man job to assemble, but pretty quick and straightforward to do. I’d definitely buy again.
6 people found this review helpful.
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