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.
Add the Colour Matched Full Length 310cm long integrated shelving to the side of your greenhouse to help retain your floor space
Add the Colour Matched Full Width 236cm long Seed Tray Shelving to the rear of your greenhouse to help retain your floor space
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)
Add the Colour Matched 150cm long x 23cm wide integrated shelving to your greenhouse to help retain your floor space
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)
This little top level Colour Matched shelf attaches to 1 or 2 Tier staging to give you a bit more storage space
Add the Silver 150cm long x 53cm wide integrated staging to your greenhouse to help retain your floor space
This automatic opener for your roof vents will automatically open your roof vents to ventilate your greenhouse when it becomes too hot.
Curtain shading will protect your plants from sun scorch and provide shade to moderate temperature. 6ft x 8ft.
A louvre window brings fresh cool air into your greenhouse to moderate the temperature inside. An essential add on.
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).
Add the Janssens retractable shading kit for ease of use
This Hygrometer will measure the humidity levels inside your greenhouse.
This Soil Thermometer will let you track the temperature of your soil inside the greenhouse.
This thermometer will tell you your maximum daytime temperature as well as record the lowest night time temperature in your greenhouse.
Add this 100L water butt kit that includes: Butt, Tap & Lid - Black Stand
The 8ft x 15ft Janssens Helios Master Victorian Greenhouse offers the discerning greenhouse gardener a strong and spacious place to enjoy as well as stunning traditional looks. You get great ventilation in this greenhouse due to it`s 3 roof vents and the massive 11 blade slatted louvre vent to let in cool air to moderate humidity inside the greenhouse.
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!
Delivery is currently within 8 weeks for Urban Models, 10-12 Weeks for Master Models and 16 weeks for all other models to UK Mainland. Your exact delivery day will be confirmed with you at least 3 days before the day by telephone.
Please note Some Scottish postal codes are subject to delivery charges.
Optional Installation information: Installation will be carried out around 14-21 working days after delivery. Optional Installation will only be carried out on a surface of slabs or concrete and only with the recommended base plinth. You may be charged for accessories Installation is for the Greenhouse only and does not include staging, accessories etc
2360mm (7′ 8″)
4580mm (15′)
2600mm (8′ 6″)
2010mm (6′ 7″)
700mm (2′ 3″) x 2000mm (6′ 6″) (aperture)
2360mm (7′ 8″) x 4580mm (15′)
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!
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 â your thriving garden.
Don't let wind effect your investment with Janssens state-of-the-art glazing system. Featuring:
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!
Every bolt, nut, and fitting in your JANSSENS greenhouse is crafted from top-quality stainless steel to withstand the elements,
Maximize your growing potential with our comprehensive water control solution:
Set up your new greenhouse with ease. Every model includes:
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 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 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.
This comprehensive 2025 guide helps you choose the perfect greenhouse by exploring crucial factors from size and materials to optimal location and essential accessories.
Make an informed decision by understanding how to assess your needs, compare material pros and cons, and ensure proper ventilation and positioning for a thriving greenhouse.
Read MoreA solid base is the backbone of any greenhouse. You might think skipping this step saves time, but trust me—I've seen plenty of greenhouses fail because of poor foundations. A dodgy base causes more headaches than you'd believe.
What happens with a bad base? Glass cracks. Doors jam. The structure twists. Water pools where it shouldn't. And fixing these problems costs way more than doing it right first time.
Read MorePlacing your greenhouse in the right spot makes all the difference between thriving plants and disappointing results. As a greenhouse specialist who's spent 15 years helping UK gardeners optimise their growing spaces, I've seen first-hand how position affects everything from temperature regulation to plant health.
Let me share what actually works in our unique British climate. The greenhouse position might seem like a minor detail, but it's one of those things that can make or break your growing success. I made this mistake myself when I first started - my poorly positioned greenhouse meant I was fighting an uphill battle with inadequate light and temperature fluctuations.
Read More