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Use code JANSS50 at checkout min order £999 (Janssens)

10x20 Janssens Master Greenhouse

10x20 Janssens Master Greenhouse
Delivery 4-16 weeks ⛟ Click to enlarge - For illustration purposes.
Janssens 8x10 Helios Master Hobby Greenhouse
Janssens Helios Master Hobby Greenhouse
Janssens 10x15 Helios Master Hobby Greenhouse
Janssens-Greenhouses-Louvre-Window
Janssens Downpipe Profile
Janssens Greenhouses Profile Cross Section Helios Ridge
Janssens Helios Corner Post Profile
Janssens Greenhouses Profile Cross Section Helios Base
Janssens Helios Gutter Profile
Janssens Helios Glazing Bar Profile
Greenhouse Size Diagram

Quick Code: P172866

SAVE £50 EXTRA

Pay ONLY £5,290 TODAY!

Use code JANSS50 at checkout
  • 10ft 2" wide x 19ft 10" deep
  • 4mm Full Length Toughened Safety Glass
  • Extra Strong Aluminium Frame
  • Double Sliding Door
  • 4 x Roof Vents
  • 11 Blade Louvre Vent
  • Includes Box Section Base Plinth
  • No Clip Rubber Glazing Gasket Strips
  • Gutters and 40mm Aluminium Downpipes
  • Stainless Steel Hardware
  • 13 Year Manufacturers Warranty
Greenhouse Size Diagram

Greenhouse Dimensions

A: Greenhouse width

3100mm (10′ 2″)

B: Greenhouse depth

6060mm (19′ 10″)

C: Ridge height

2740mm (8′ 11″)

D: Eaves height

2010mm (6′ 7″)

E & F: Door Size

700mm (2′ 3″) x 2000mm (6′ 6″) (aperture)

Minimum Base Size

3100mm (10′ 2″) x 6060mm (19′ 10″)

Customise your Greenhouse

More Sizes:

Select your Colour:

Get it installed by Professionals:

Installation requires that you purchase the Base Plinth Option if one is available. You MUST have a surface of slabs, concrete or decking. NOT soil or gravel.

Installation
£1,380

Add Staging?

Janssens Silver Full Length Integrated Staging
+ £135

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

Qty 1
Janssens Seed Tray Shelving
+ £250

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

Qty 1
£10 off
1 Tier Staging Silver
+ £69

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)

Qty 1
Janssens Integrated Silver Shelving
+ £40

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

Qty 1
£11 off
2 Tier Staging Silver
+ £88

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)

Qty 1
£10 off
Top Tier Staging Extension Silver
+ £49

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

Qty 1
Janssens Silver Integrated Staging
+ £80

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

Qty 1

Add Ventilation and Shading?

Auto Roof Vent Opener
+ £39

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

Qty 1
Curtain Shading
+ £27

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

Qty 1
Louvre Vent
+ £79

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

Qty 1
Janssens Sunscreen Shading
+ £175

Add the Janssens retractable shading kit for ease of use

Add Extras?

Hygrometer
+ £17

This Hygrometer will measure the humidity levels inside your greenhouse.

Soil Thermometer
+ £29

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

Max/Min Thermometer
+ £23

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
+ £54

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

Qty 1

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!

Palram Silver Steel Base
Included with ALL Janssens Greenhouses.

The Janssens Foundation Base eliminates the need for a full concrete foundation. Simply assemble your greenhouse and secure it with our quick 4-corner anchoring system!

Premium 4mm Toughened Glass

JANSSENS delivers superior protection with our full-length 4mm toughened glass. Six times stronger than ordinary glass, it offers exceptional durability and safety. Enjoy crystal-clear views and peace of mind, knowing you're shielded by the industry's safest greenhouse glass. Polished edges ensure easy, safe assembly, letting you focus on what truly matters – your thriving garden.

Janssens Glazing Gasket
Weather-Tight Seal: Superior Protection Guaranteed

Don't let wind effect your investment with Janssens state-of-the-art glazing system. Featuring:

  • Advanced rubber strip technology
  • Unbeatable water and wind resistance
  • Seamless, long-lasting seal
Janssens Glazing Bars
Industry-Leading Strength in Every Frame

Janssens cutting-edge tubular aluminium glazing bars are among the sturdiest in today's greenhouse market. Enjoy peace of mind knowing your investment is protected by top-tier materials that outlast and outperform the competition!

Janssens Roof Ridge Profile
Built to Last: Premium Stainless Steel Hardware

Every bolt, nut, and fitting in your JANSSENS greenhouse is crafted from top-quality stainless steel to withstand the elements,

Janssens Roof Ridge Profile
Smart Water Management System Included

Maximize your growing potential with our comprehensive water control solution:

  • Efficient gutters to collect rainwater
  • Clever condensation channels to manage humidity
  • Large 40mm downpipes for rapid drainage
Janssens Instructions
Effortless Assembly at Your Fingertips

Set up your new greenhouse with ease. Every model includes:

  • Detailed step-by-step manual
  • Comprehensive assembly video
Janssens Qualicoat Powder Coating
Lasting Beauty: Premium Powder-Coated Finish

Janssens only use Qualicoat-certified powder coating on all of their Greenhouse products. This high-quality finish ensures your JANSSENS greenhouse stays stunning for years. Contact us for custom RAL colours.

Janssens Greenhouse
Janssens Greenhouses

Janssens Greenhouses were established in 1946 in Lier, Belgium and is now a super modern 6500sqm production facility equipped with the very latest high-tech automated machinery. Many years of production and the very latest design and manufacturing processes make a Janssens Greenhouse one of the best high end greenhouses you can buy today.

Janssens Greenhouse 13 Year Warranty
13 Year Warranty

Janssens greenhouses come with a 10-year warranty on the greenhouse frame. This warranty covers any manufacturing defects in materials or workmanship. However, it does not cover glass or polycarbonate. The warranty is only valid if the greenhouse is assembled according to the provided instructions.

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