Call to Order: 0800 098 8877

0800 098 8877

Advice & Blog

£15 OFF!

Use code SUMMER15 in the basket min order £449 (Greenhouses)

10x12 Janssens Modern Pent Roof Greenhouse

Quick Code: P172996
Greenhouse Size Diagram

Greenhouse Dimensions

A: Greenhouse width

3100mm (10′ 2″)

B: Greenhouse depth

3830mm (12′ 6″)

C: Ridge height

2920mm (9′ 6″)

D: Eaves height

2040mm (6′ 8″)

E & F: Door Size

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

Minimum Base Size

3100mm (10′ 2″) x 3830mm (12′ 6″)

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.

sku:M33

£8,950

Qty

Check Delivery

Enter your Postcode below to check delivery

Urban Models - Within 8 weeks

Master Models - Within 10-12 weeks

All other Models - Within 16 weeks

  • 3100mm x 3830mm Dimensions (10ft 1” x 12ft 5”)
  • 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
  • 2 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 10x12 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!

1: Select your Size

3: Door Options

Hinged Double Door
Hinged Double Door
+ £1,100
Qty 1
Single Hinged Door
Single Hinged Door
+ £495
Qty 1
Double Sliding Door
Double Sliding Door
+ £475
Qty 1
Single Sliding Door
Single Sliding Door
+ £190
Qty 1

4: Staging

Janssens Colour Matched Full Length Integrated Shelving Recommended
Janssens Colour Matched Full Length Integrated Shelving
+ £145
Qty 1
Janssens Colour Matched Seed Tray Shelving
Janssens Colour Matched Seed Tray Shelving
+ £295
Qty 1
1 Tier Staging Colour Matched
SAVE £15 17%OFF
1 Tier Staging Colour Matched
+ £74
Qty 1
Janssens Integrated Colour Matched Shelving
Janssens Integrated Colour Matched Shelving
+ £55
Qty 1
2 Tier Staging Colour Matched
SAVE £23 19%OFF
2 Tier Staging Colour Matched
+ £96
Qty 1
Top Tier Staging Extension Colour Matched
SAVE £10 17%OFF
Top Tier Staging Extension Colour Matched
+ £49
Qty 1
Janssens Colour Matched Integrated Staging Recommended
Janssens Colour Matched Integrated Staging
+ £95
Qty 1

5: Ventilation and Shading

Auto Roof Vent Opener
Auto Roof Vent Opener
+ £60
Qty 1
Curtain Shading
Curtain Shading
+ £27
Qty 1
Louvre Vent Recommended
Louvre Vent
+ £130
Qty 1
Auto Louvre Opener
Auto Louvre Opener
+ £60
Qty 1
Janssens Sunscreen Shading
Janssens Sunscreen Shading
+ £129
Janssens Roof Vent
Janssens Roof Vent
+ £95
Qty 1
Janssens Side Vent
Janssens Side Vent
+ £320
Qty 1

6: Extras

Hygrometer
Hygrometer
Soil Thermometer
Soil Thermometer
Max/Min Thermometer
Max/Min Thermometer
100L Mini Rainsaver Water Butt
100L Mini Rainsaver Water Butt
+ £54
Qty 1

10x12 Janssens Modern Pent Roof Greenhouse

£8,950