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10x20 Janssens Modern Pent Roof Greenhouse

Quick Code: P172999
Greenhouse Size Diagram

Greenhouse Dimensions

A: Greenhouse width

3100mm (10′ 2″)

B: Greenhouse depth

6020mm (19′ 9″)

C: Ridge height

2920mm (9′ 7″)

D: Eaves height

2040mm (6′ 8″)

E & F: Door Size

1400mm (4′ 7″) x 2000mm (6′ 7″) (aperture)

Minimum Base Size

3100mm (10′ 2″) x 6020mm (19′ 9″)

sku:M33

£10,895

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Urban Models - Within 8 weeks

Master Models - Within 10-12 weeks

All other Models - Within 16 weeks

  • 3100mm x 6020mm Dimensions (10ft 1” x 19ft 8”)
  • 2.9m High Ridge Height
  • Aluminium Frame with Tubular and Box Section for Superior Strength.
  • Green or Black Powder Coated Frame.
  • Box Section Base Plinth.
  • Double Sliding Locking Doors
  • 4mm Full Length Toughened Safety Glass
  • 3 x Automatic Roof Vents
  • 2 x Hinged Side Vents
  • Rubber Glazing Gasket Strips (no fiddly clips)
  • Gutters and 40mm Aluminium Downpipes.
  • Stainless Steel Fittings.
  • Step by Step Instruction Manuals with Instructional DVD.
  • 13 Year Manufacturers Warranty.
  • Fully Customisable Door and Windows are available as Options below.
  • Many Accessories Available - Scroll down this page.

The 10x20 Janssens Modern Pent Roof Greenhouse is the perfect large building if you are looking for a lot more head height and practical growing space. The unique design makes the Modern a great place to relax with friends while making a striking statement in your garden. Not quite big enough, add a 2ft extension in the options below.

Pick from a green or black powder-coated finish to suit your garden or personal style preferences. Both Hinged and Sliding Double and Single Doors are available as options below to fully customise your greenhouse or call us for details.

All Janssens Modern 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!

Can't find the size or specification to suit your needs?

Most Janssens Greenhouses are fully customisable.

Call us on 0800 098 8877 for your Free Quote!

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

1: Select your Size

2: Choose your colour

Green Powder Coated Frame
Green Powder Coated Frame

Black Powder Coated Frame
Black Powder Coated Frame

+ £0

4: Door Options

Hinged Double Door
Hinged Double Door

Add a set of hinged double doors to your greenhouse

+ £1,100
Qty 1
Single Hinged Door
Single Hinged Door

Add a Single Hinged Door to your greenhouse

+ £495
Qty 1
Double Sliding Door
Double Sliding Door

Add a set of Double Sliding Doors to your Greenhouse

+ £475
Qty 1
Single Sliding Door
Single Sliding Door

Add a Single Sliding Door to your greenhouse

+ £190
Qty 1

5: Staging

Janssens Colour Matched Full Length Integrated Shelving Recommended
Janssens Colour Matched Full Length Integrated Shelving

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

+ £145
Qty 1
Janssens Colour Matched Seed Tray Shelving
Janssens Colour Matched Seed Tray Shelving

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

+ £295
Qty 1
1 Tier Staging Colour Matched
SAVE £15 17%OFF
1 Tier Staging Colour Matched

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

+ £74
Qty 1
Janssens Integrated Colour Matched Shelving
Janssens Integrated Colour Matched Shelving

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

+ £55
Qty 1
2 Tier Staging Colour Matched
SAVE £23 19%OFF
2 Tier Staging Colour Matched

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

+ £96
Qty 1
Top Tier Staging Extension Colour Matched
SAVE £10 17%OFF
Top Tier Staging Extension Colour Matched

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

+ £49
Qty 1
Janssens Colour Matched Integrated Staging Recommended
Janssens Colour Matched Integrated Staging

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

+ £95
Qty 1

6: Ventilation and Shading

Auto Roof Vent Opener
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.

+ £60
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 Recommended
Louvre Vent

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

+ £130
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).

+ £60
Qty 1
Janssens Sunscreen Shading
Janssens Sunscreen Shading

Add the Janssens retractable shading kit for ease of use

+ £129
Janssens Roof Vent
Janssens Roof Vent

Add roof ventilation to your greenhouse to help moderate the temperature

+ £95
Qty 1
Janssens Side Vent
Janssens Side Vent

Help recirculate the air in your greenhouse with a side vent or two!

+ £320
Qty 1

7: 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

10x20 Janssens Modern Pent Roof Greenhouse

£10,895