Exaco Janssens Gigant Large Greenhouse

The Gigant greenhouse delivers exceptional scale and performance. Crafted in Belgium by Janssens, with a sturdy tubular aluminum frame and 4mm tempered glass, it features a tall roofline and a vast interior, providing generous space for taller plants and projects. The design allows flexible placement of doors and windows, making it adaptable to both your space and your gardening style.

For dedicated gardeners and hobbyists, the Gigant greenhouse offers a bright, durable environment where plants thrive, and creativity flourishes. It combines European design heritage with modern engineering for lasting beauty, reliability, and year-round inspiration.

Please note: Because the Gigant can only be purchased as a customized model, a special order must be placed with the Janssens factory in Belgium. Lead times are longer than other models.

• 17-gauge tubular aluminum frame, with heavy-duty portal frame supports and heavy-duty gable end supports
• Glazing panels — 4mm tempered glass or 10mm twin-wall polycarbonate, per customer selection
• Roof vents for natural ventilation
• Doors and windows as configured by the customer from the Accessories list

• Glazing: 4mm tempered glass panes OR 10mm twin-wall polycarbonate (28" wide)
• Frame: 17-gauge tubular aluminum extrusions, heavy-duty portal frame supports, heavy-duty gable end supports
• Colors: Black (RAL9005), Fir Green (RAL6009), White (RAL9010); custom RAL colors available
• Dimensions: No default length or width — fully customized per parameters. Width determines both peak height and roof pitch. GAP — the Length/Width/Panels/Wall Height/Peak Height/Roof Pitch chart was cut off in the source screenshot; need the uncropped image to populate exact figures.
• Extra Height: Second level of glazing panels can be added to side walls, extending wall/peak height by 1'0", 1'8", or 2'11"
• Doors & Windows: No standard configuration — selected from Accessories list. Double doors require walls with at least 4 panels
• Glazing Substitutions: Narrow panels (~1'2" width) can replace standard panels (~2'4" width) at a 2:1 ratio with no change to overall dimensions. On glass models, roof glazing panels can be substituted for polycarbonate
• Decorative Panels: Optional metal panels along the bottom of side walls, identical to those on the Retro Victorian greenhouse

Assembly typically takes 2–3 days with a crew of 2–3 people — this isn't a same-afternoon build, largely due to the glass glazing work and the size of the larger models. Buyers should plan the timeline and labor accordingly, especially if they're coordinating with a foundation contractor beforehand.

Manual

Free shipping to all 48 contiguous states

Delivery time: 8–13 business days

Ships via LTL freight (curbside): liftgate drops the pallet at ground level; plan on 2–3 people to move it from the curb to your install site

Outside the mainland US (Alaska, Hawaii, international)? Shipping terms need to be confirmed separately

Warranty


Damages

Please inspect the packaging of your item(s) upon arrival. If you notice any damage, make note of it when signing for delivery. If your item(s) arrive damaged, please contact us with photos and we will process an insurance claim on your behalf.

Cancellations & Refunds

Orders cancelled after 48 hours are subject to a $20 administration fee, whether or not the order has shipped. If the order has already shipped, the buyer is also responsible for actual return shipping charges. Refunds are issued only to the original credit card used at the time of purchase.

Many of our items are large and heavy, and cannot be returned for buyer's remorse. In these cases, all sales are final.

Returns (RMA)

In certain situations, we will accept a return through our RMA department. The buyer is responsible for full return shipping costs. All returns must be pre-approved by our RMA department before being shipped back.