The majestic greenhouse with a soaring sense of space
Ready to give your garden a greenhouse that appears like a work of art? The Kathedral is Janssens’ most majestic model: an ingeniously engineered structure with a high ridge that gives you the most spectacular view of your garden and the sky above. Pure calm, pure serenity, a greenhouse to breathe in.
This greenhouse owes its name to its presence. The imposing ridge of nearly 4 metres and the generous glass surface give the Kathedral the character of a light-filled chapel in the heart of your garden, equally suited as a spectacular garden room, a space for climbing plants or a home for citrus trees and exotic planting.
Every Kathedral is unique, because you determine how it takes its place. You choose the length your garden deserves, from 458 cm to a full 9 metres, and the RAL colour that complements your home or planting. For the configuration type, you can opt for a freestanding unit, a lean-to against the wall or a wall-mounted installation on top of a dwarf wall. The glazing is in toughened safety glass, and you decide on the position and number of sliding or hinged doors, side windows/top-hung windows, roof windows and ventilation elements. Finally, there are the decorative finishing touches: from elegant ridge ornaments to decorative panels that underline the refined character.
The Kathedral adapts effortlessly to your garden, style and sense of serenity.
Explore the different options below and create a greenhouse that is perfectly yours.
The Kathedral range is a detached garden room that can be placed completely independently of your home. Ideal as additional living space, a studio or a relaxation area in the heart of the garden.
The Kathedral series can be mounted on a dwarf wall of 20, 40, or 60 cm. This gives the greenhouse an even more exclusive appearance, ideal for use as a garden room. The Kathedral range can be mounted on a low wall or raised base of 20, 40 or 60 cm, giving the greenhouse an even more exclusive appearance, ideal when used as a garden room.
Drawing on 80 years of expertise and experience in professional greenhouse construction, Janssens has developed its own proprietary profile system, the foundation of our current range of garden greenhouses.
Five core principles guide everything we do: craftsmanship, the best price-to-quality ratio, durable and low-maintenance materials, modular construction and a product that is hassle-free for life.
Key features:
Fully adaptable to your space: choose the ideal length, width, and height yourself. With flexible glass layouts and various placement options, this greenhouse fits your home perfectly.
Dimensions
Optional
Personalize your greenhouse down to the smallest details. From frame colors to glass types and decorative finishes: configure a version that perfectly matches your style and requirements.
Frame
Seals
Glazing type
Decorative elements
Add-ons
Accessories
Janssens offers a wide range of optional accessories: from seedtrays, tablers and shelves to hanging systems.
The high ridge and generous glass surface do something remarkable to the space: light floods in abundantly, plants have all the room they need to grow upward, and you stand in an environment that invites you to take a deep breath. Inside, every square metre seems to expand, a greenhouse that exudes serenity just as much as it frames the sky above.
A high ridge demands a well-thought-out structural design, and the Kathedral delivers exactly that. The reinforced main rafters carry the weight of the upper structure without ever deflecting, the seals around every glazed section keep the construction weathertight in rain or storm, and the aluminium requires no paint, no oil, no significant maintenance. A cathedral in your garden that will stand just as peacefully in half a century’s time.
A Janssens can be recognized by three things: the choice of materials that last for decades, a range that adapts to every garden instead of the other way around, and a level of finish that convinces even the most demanding gardener. These three pillars form the foundation of every model.
Materials and design focused on weather resistance, ease of maintenance, and timeless design. You buy a Janssens once.
From 'action models' (ready-made standard models) to fully customizable greenhouses, with a choice of dimensions, doors, windows, glazing, and finishes.
Maintenance-free aluminium, safety glass, durable rubber seals, and stainless steel fasteners. Every component is chosen for the long term.
Custom Models, the range of fully customizable greenhouses by Janssens. Each model has its own character: from the spacious Helios to the massive Gigant and the minimalist Modern.
Choose the model that suits your garden, style, and ambition.
Every greenhouse we make helps not only your garden grow, but the world too.
For every greenhouse sold, we plant a tree together with Go Forest in Peru or the Congo.
This way, we contribute to global reforestation and a better future for our planet.
Janssens sells exclusively through authorised dealers. Our international network provides personalised advice, local expertise and professional installation guidance, across Europe, Scandinavia and the United States.
