Gigant Greenhouse By Janssens

Description

The Janssens Gigant is the largest and most commanding structure in the Janssens residential range — a full-scale glass pavilion designed for property owners who require a majestic outdoor room that transcends the ordinary. With its soaring interior volume, classic Victorian ridge cresting, and 4mm tempered safety glass enclosure, the Gigant creates a presence on the landscape that is impossible to ignore and difficult to forget. Whether conceived as a grand-scale entertaining venue, a glass-walled event pavilion, a private conservatory, or a year-round outdoor hospitality space, it delivers a level of architectural gravitas that no mid-range structure can approach.

Extra-high 6’7” sidewalls and a towering peak give the Gigant an interior volume that feels genuinely expansive — large enough for multiple lounge areas, a dining configuration, or a landscape of oversized architectural plants. A high-capacity ventilation system with multiple oversized roof vents and louvered windows provides the climate regulation this scale of space demands, while heavy-duty tubular aluminum construction and superior rubber seals maintain structural integrity through extreme wind loads and heavy snow.

Available in two sizes — 15’ × 24’8” and 19’11” × 29’6” — and manufactured in Belgium by Janssens to TUV and GS safety standards, the Gigant is backed by a 15-year limited warranty and designed to serve as a permanent centerpiece of the estate.

Lead Times: 2–12 weeks depending on US inventory and any custom selections.

Payment Policy: Your card is not charged until a delivery window is confirmed, typically within 1–2 business days.

Specifications

Frame & Glazing

Glazing: 4mm tempered safety glass throughout

Frame: Heavy-duty tubular aluminum extrusions, Janssens signature construction

Architectural Details: Classic Victorian ridge cresting, decorative Old World finish

Sidewall Height: 6’ 7”

Ventilation

Roof Vents: Multiple oversized roof vents

Windows: Louvered windows for precision airflow

Climate: Heavy-duty rubber seals throughout for superior insulation

Model Sizes

Gigant 34: 15’ W × 24’ 8” L

Gigant 46: 19’ 11” W × 29’ 6” L

Starting Price: $43,999

Warranty: 15-year limited warranty (TUV and GS certified)

Origin: Manufactured in Belgium

Why You’ll Love It

The Most Impressive Outdoor Room You’ll Ever Build.

With 6’7” sidewalls and a soaring peak across two generous footprints, the Gigant creates an interior that feels genuinely monumental. Multiple seating areas, a dining configuration, a bar — the spatial freedom to design the outdoor room exactly the way you want it, at a scale that justifies every detail.

A Venue Built for the Art of Entertaining.

Imagine hosting a candlelit dinner for twenty, a garden reception, or a corporate event under a climate-controlled glass canopy with Victorian ridge cresting overhead. The Gigant doesn’t just accommodate these occasions — it makes them unforgettable. This is a structure built for the host who takes the experience seriously.

Four Seasons of Genuine Comfort.

Superior insulation, heavy-duty rubber seals, and a high-capacity ventilation system mean the Gigant maintains a comfortable interior environment regardless of what’s happening outside. A lush, sun-drenched retreat in January. A cool, sheltered pavilion in August. Year-round usability is not an aspiration here — it’s the design intent.

Architecture That Defines the Estate.

The Victorian ridge cresting, decorative Old World finish, and sheer scale of the Gigant make it a permanent landscape centerpiece — the kind of architectural feature that sets a property in a category of its own and adds measurable long-term value.

Belgian Engineering at Its Most Ambitious.

Built to TUV and GS safety standards with heavy-duty tubular aluminum construction, the Gigant is engineered to withstand extreme wind loads and significant snow accumulation. Backed by Janssens’ 15-year limited warranty, this is an investment that performs as impressively as it looks.

About the Manufacturer

Janssens of Belgium is a family-owned greenhouse company with more than 75 years of horticultural engineering expertise. Founded in 1946, Janssens has earned an international reputation for producing glass structures that set the benchmark for quality, precision, and longevity. Their structures are TUV and GS certified for safety and are engineered to perform in extreme conditions — high winds, heavy snow, and intense hail — making them a trusted architectural investment for residential and commercial properties worldwide.