Perennial Home & Garden Greenhouses
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Perennial Clay & Garden
Modern Greenhouse
The Janssens Modern greenhouse redefines contemporary garden architecture, replacing traditional ornamentation with a striking, minimalist aesthetic. Defined by its sophisticated single-slope shed roof design, this model features a dramatic, single-directional glass incline engineered to capture maximum ambient light and frame expansive, unobstructed views of your landscape.
Crafted in Belgium by Janssens—a family-owned company with over 75 years of elite greenhouse expertise—the Modern greenhouse bridges old-world European heritage with avant-garde engineering. It provides an inviting, sun-drenched sanctuary for both hobbyists and serious collectors who demand architectural distinction alongside superior horticultural performance.
Signature Engineering & Modern Design:
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Sleek Monoslope Profile: A clean, shed-roof architectural silhouette designed to optimize sunlight capture, blend seamlessly against modern structures, and maximize open, airy interior views.
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Reinforced Portal Framing: Engineered with ultra-sturdy tubular portal frames that deliver clean interior sightlines without sacrificing structural integrity or wind resistance.
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Premium Perimeter Drainage: Built with extra-strength, heavy-duty tubular gutters integrated flawlessly on all four sides for elite water routing and structural rigidity.
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Customized Layout Flow: Features completely flexible window and door placement options, allowing you to tailor access points and ventilation paths to perfectly match your landscape’s natural layout.
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Industrial Glazing: Clad entirely in thick, full-size 4mm tempered safety glass panes to ensure lasting safety, maximum light transmission, and unwavering durability through changing seasons.
| Model Specifications | M23 - (Special Order Only) | M34 | M36 |
|---|---|---|---|
| Length | 10'2" (4 panels) | 15' (6 panels) | 19'11" (8 panels) |
| Width | 7'9" (3 panels) | 10'2" (4 panels) | 10'2" (4 panels) |
| Peak Height | 8'10" | 9'7" | 9'7" |
| Sidewall Height | 6'7" | 6'7" | 6'7" |
| Area | 79 sq. ft. | 150 sq. ft. | 200 sq. ft. |
| Roof Pitch | 15 degrees | 15 degrees | 15 degrees |
| Doors | 1 Set of Double Hinged Doors | 1 Set of Double Hinged Doors | 1 Set of Double Hinged Doors |
| Windows | 2 Roof Vents, 2 Push Out Side Windows, 1 Louvre Window | 2 Roof Vents, 2 Push Out Side Windows, 2 Louvre Windows | 2 Roof Vents, 2 Push Out Side Windows, 2 Louvre Windows |
| Window Openers | 1 Automatic + 1 Spindle (Roof), 1 Automatic (Louvre) |
1 Automatic + 1 Spindle (Roof), 2 Automatic (Louvre) |
Automatic + 1 Spindle (Roof), 2 Automatic (Louvre) |
| Glazing | 4mm tempered glass panes | 4mm tempered glass panes | 4mm tempered glass panes |
| Frame |
17 gauge tubular aluminum extrusions heavy duty roof extrusions |
17 gauge tubular aluminum extrusions heavy duty roof extrusions |
17 gauge tubular aluminum extrusions heavy duty roof extrusions |
| Colors | Black (RAL9005) | Black (RAL9005) | Black (RAL9005) |
| Concrete 20x20 Slab | + $5,000 | + $5,000 | + $5,000 |
| Bluestone/Pavers | + $10,000 | + $10,000 | + $10,000 |
| Brick Knee Wall | Starting at $6,000 | Starting at $6,000 | Starting at $6,000 |
| Freight within 60 miles | + $2,000 | + $2,000 | + $2,000 |
| Assembly | Starting at $3,000 |
Starting at $3,000 |
Starting at $3,000 |
When you invest in a Janssens structure, you are not just purchasing a greenhouse—you are adding a permanent architectural asset to your estate. For over 75 years, Janssens has been Europe’s premier manufacturer of luxury glass greenhouses, engineered in Belgium to meet the highest standards of beauty and durability.
- Architectural Glass: Unlike flimsy polycarbonate panels that discolor, scratch, and cloud over time, Janssens uses 4mm tempered safety glass. It provides crystalline clarity, superior insulation, and is rubber-sealed to be completely wind and watertight.
- Industrial-Grade Framework: Built with heavy-duty, thick-gauge aluminum profiles, these structures are engineered to withstand extreme weather. They handle heavy winter snow loads and high wind gusts that would compromise standard hobby greenhouses.
- Superior Ventilation & Design: The steep 38-degree roof pitch isn't just a classic English look—it maximizes interior headspace, allows optimal light penetration, and works alongside the integrated roof vents to handle heat distribution perfectly.
- Built for Generations: Every joint, gutter, and condensation channel is seamlessly engineered into the frame. Low-maintenance and rust-proof, a Janssens greenhouse is designed to look as striking in thirty years as it does the day it is assembled.
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