A pyramid roof you can see from every side
Four glass roof panels rise to a center peak of 9' 5" on the 10' x 10' and 9' 11" on the 12' x 12', so light pours in and rain and snow run off.


The Janssens Pyramid is a square glass greenhouse with a four-sided pyramid roof and a full 360° view of your garden. It is a true showpiece for a patio, lawn or kitchen garden, and it gives you a bright, roomy space for growing all year, or a glass garden room for relaxing. Choose from two sizes: 10' x 10' (10' 2" x 10' 2") or 12' x 12' (12' 7" x 12' 7").
The sidewalls stand 6' 8" (204 cm) tall, so you can work comfortably right up to the glass, and the pyramid roof helps rain and snow run off. Every panel is 4 mm toughened safety glass set in rubber glazing seals on a strong aluminum frame, fastened with stainless steel hardware.
Janssens greenhouses have been made in Lier, Belgium since 1946. Today they are built in a modern 6,500 m² (about 70,000 sq ft) factory with automated machinery, which makes Janssens one of the best high-end greenhouses you can buy.
*For more information, please see our shipping and returns page.
Exaco · Hobby Greenhouse
Why customers choose it
Four glass roof panels rise to a center peak of 9' 5" on the 10' x 10' and 9' 11" on the 12' x 12', so light pours in and rain and snow run off.
The 6' 8" sidewalls let you run benches and shelves along every wall without having to stoop.
Two doors slide apart for a wide entrance that never swings into your plants, and two louvre windows let out hot, humid air on sunny days.
Full-length panels of toughened glass, about six times stronger than ordinary glass, with polished edges for safer handling.
Every pane sits in a rubber glazing strip that keeps out wind and water and holds the glass firmly for years.
Tubular aluminum glazing bars give the frame its strength, finished in Qualicoat-certified black powder coating.
Roof gutters collect rainwater, condensation channels manage humidity, and large 40 mm downpipes drain it away fast.
The Janssens foundation base comes with the kit, so you don't need a full concrete slab. It anchors at all 4 corners.
Every bolt, nut and fitting is stainless steel, so the hardware stands up to rain and humidity season after season.
The details
| Exterior size | 10' 2" x 10' 2" (10' x 10') or 12' 7" x 12' 7" (12' x 12') |
|---|---|
| Floor area | About 103 sq ft (10' x 10') or 158 sq ft (12' x 12') |
| Walking height | 6' 8" (80.35 in) at the sidewalls |
| Peak height | 9' 5" (112.6 in) on the 10' x 10', 9' 11" (119.5 in) on the 12' x 12' |
| Glazing | Full-length 4 mm toughened safety glass with polished edges, in rubber seals |
|---|---|
| Frame | Heavy-duty tubular aluminum, black Qualicoat powder coating |
| Fasteners | Stainless steel bolts, nuts and fittings |
| Roof shape | Four-sided pyramid |
| Gutters | Roof gutters, condensation channels and 40 mm downpipes |
| Foundation | Janssens foundation base included, with 4-corner anchoring |
| Brand | Janssens, made in Belgium, imported by Exaco |
| Door | Double sliding doors |
|---|---|
| Windows | 2 louvre windows |
| Assembly | Step-by-step manual and assembly video included |
|---|---|
| Warranty | 15-year limited |
Free curbside freight delivery
Choose your size, color and options. Your greenhouse ships from the manufacturer's warehouse, packed for freight.
We'll contact you to set up a delivery time frame that works for you.
Delivery is by LTL motor freight on an 18-wheeler. Let us know about tight roads or low wires so we can plan ahead.
Someone needs to be there to receive the delivery. The driver does most of the work but may need a hand.
Foundations and bases are bulky, so we recommend ordering them together with your greenhouse to avoid a separate freight charge.
Good to know
Can't find your answer? Our greenhouse specialists are happy to help you choose.
678-408-8222 Email usYes. Shipping is free. Locations with limited access, such as islands, are rare exceptions that may carry an extra fee, and we'll tell you before anything ships.
Yes. If you find the same greenhouse for less from an authorized dealer, call or email us with the offer and we'll review it.
Yes. Mulberry Greenhouses is an authorized retailer, so your greenhouse is covered by the full manufacturer warranty.