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(greenhouses)

10x20 Janssens Master Greenhouse

10x20 Janssens Master Greenhouse
Delivery: Within 8-16 weeks ⛟
Click to enlarge - For illustration purposes. Quick Code: P172866
Greenhouse Size Diagram

Greenhouse Dimensions

A: Greenhouse width

3100mm (10′ 2″)

B: Greenhouse depth

6060mm (19′ 11″)

C: Ridge height

2740mm (9′)

D: Eaves height

2010mm (6′ 7″)

E & F: Door Size

700mm (2′ 4″) x 2000mm (6′ 7″) (aperture)

Minimum Base Size

3100mm (10′ 2″) x 6060mm (19′ 11″)

sku:MH36

£5,340

£15 EXTRA OFF!

Use code SPRING15 at checkout min order £499
(greenhouses)

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Urban Models - Within 8 weeks

Master Models - Within 10-12 weeks

All other Models - Within 16 weeks

  • 3100mm x 6060mm Dimensions (10ft 1” x 19ft 8”)
  • 2m High Eaves
  • Aluminium Frame with Tubular and Box Section for Superior Strength.
  • Box Section Base Plinth.
  • Double Sliding Door.
  • 4mm Full Length Toughened Safety Glass
  • Rubber Glazing Gasket Strips (no fiddly clips)
  • 4x Roof Vents
  • 11 Blade Louvre Vent
  • Gutters and 40mm Aluminium Downpipes.
  • Stainless Steel Fittings.
  • Step by Step Instruction Manuals with Instructional DVD.
  • 13 Year Manufacturers Warranty.
  • Many Accessories Available - Scroll down this page.

The 10ft x 20ft Janssens Helios Master Greenhouse is the largest in the range, and a superb example of a greenhouse ideal for domestic or commercial use. At 10ft Wide it`s really practical. Then add in the 20ft length and you have a greenhouse for the serious gardener or grower.4mm Toughened Glass is held in by rubber glazing gasket, making it very wind resistant and safe for the garden or business environment.

All Janssens Master Greenhouses are built around a strong box-section aluminium frame and base, with 4mm Toughened Glass held in with proper rubber glazing gasket to take on the worse of UK weather!

Options: Click options to add them to your order then click "Buy Now"

1: Select your Size

3: Staging

Janssens Silver Full Length Integrated Staging Recommended
Janssens Silver Full Length Integrated Staging

Add the Silver Full Length 458cm long integrated shelving to the side of your greenhouse to help retain your floor space

+ £135
Qty 1
Janssens Seed Tray Shelving
Janssens Seed Tray Shelving

Add the Silver Full Width 310cm long Seed Tray Shelving to the rear of your greenhouse to help retain your floor space

+ £250
Qty 1
1 Tier Staging Silver
SAVE £10 13%OFF
1 Tier Staging Silver

This 1 Tier Vitavia silver greenhouse staging gives you a handy work surface and storage area. Dimensions: 76cm (H) x 50cm (D) x 120cm (W)

+ £69
Qty 1
Janssens Integrated Silver Shelving
Janssens Integrated Silver Shelving

Add the Silver 150cm long x 23cm wide integrated shelving to your greenhouse to help retain your floor space

+ £40
Qty 1
2 Tier Staging Silver
SAVE £11 11%OFF
2 Tier Staging Silver

This 2 Tier Vitavia silver greenhouse staging gives you a handy work surface with additional low level storage. Dimensions: 76cm (H) x 50cm (D) x 120cm (W)

+ £88
Qty 1
Top Tier Staging Extension Silver
SAVE £10 17%OFF
Top Tier Staging Extension Silver

This little top level silver shelf attaches to 1 or 2 Tier staging to give you a bit more storage space

+ £49
Qty 1
Janssens Silver Integrated Staging Recommended
Janssens Silver Integrated Staging

Add the Silver 150cm long x 53cm wide integrated staging to your greenhouse to help retain your floor space

+ £80
Qty 1

4: Ventilation and Shading

Auto Roof Vent Opener Recommended
Auto Roof Vent Opener

This automatic opener for your roof vents will automatically open your roof vents to ventilate your greenhouse when it becomes too hot.

+ £39
Qty 1
Curtain Shading
Curtain Shading

Curtain shading will protect your plants from sun scorch and provide shade to moderate temperature. 6ft x 8ft.

+ £27
Qty 1
Louvre Vent
Louvre Vent

A louvre window brings fresh cool air into your greenhouse to moderate the temperature inside. An essential add on.

+ £79
Qty 1
Auto Louvre Opener
Auto Louvre Opener

This automatic opener mechanism will open your louvre window for you when you’re not around. No need to worry about ventilation, this does it automatically for you! (Does not include louvre window).

+ £40
Qty 1
Janssens Sunscreen Shading
Janssens Sunscreen Shading

Add the Janssens retractable shading kit for ease of use

+ £175

5: Extras

Hygrometer
Hygrometer

This Hygrometer will measure the humidity levels inside your greenhouse.

Soil Thermometer
Soil Thermometer

This Soil Thermometer will let you track the temperature of your soil inside the greenhouse.

Max/Min Thermometer
Max/Min Thermometer

This thermometer will tell you your maximum daytime temperature as well as record the lowest night time temperature in your greenhouse.

100L Mini Rainsaver Water Butt
100L Mini Rainsaver Water Butt

Add this 100L water butt kit that includes: Butt, Tap & Lid - Black Stand

+ £54
Qty 1

6: Greenhouse Installation by a certified greenhouse installer

Please Note: installation can only be carried out using the Optional Base Plinth (if available) onto a flat level surface such as slabs, concrete or decking that is to the Minimum base size stated in the dimensions diagram. Installation is for the Greenhouse, the fitting of downpipes, autovents, louvres, roof vents and cresting only and does not include groundworks, staging, accessories.

Greenhouse Installation
Greenhouse Installation

We are currently able to offer installation in the following postcodes:

Your Greenhouse will be delivered and installed on the same day, this can add 2-4 weeks to the standard delivery time.

+ £1,275
Staging/Shelving Assembly
Staging/Shelving Assembly

Please Note, Only Available with Optional Greenhouse Installation.If you've ordered optional installation but don't want to put your staging together, choose this option and let our team assemble it for you.(Price is per Staging).

Qty 1
+ £85

10x20 Janssens Master Greenhouse

£5,340