A monumental orangery

With its spacious design, the Kathedral invites everyone to enjoy gardening. In no time at all you create a cultivation paradise that comes standard with narrow glass panels and a Victorian ridge ornament. The 45° roof slope ensures a comfortable height in the greenhouse. In combination with its impeccable style, it is an orangery with an imposing presence.

This greenhouse is also an excellent choice for a gardener who does not want to worry about the maintenance of a greenhouse. The high-quality aluminium profiles and the 4mm tempered safety glass make this classic greenhouse strong enough to last for years. The structure is available in aluminium black or green or in limited RAL colours.


  • Aluminum in green or black lacquered version 
    Top-quality tubular profiles for optimal durability.
  • 4 mm tempered safety glass
    Up to 7 times stronger than garden glass, which breaks into small, harmless fragments in the event of damage. 

Configure your greenhouse

A x B M2 H1 H2 3D
KAT46 458 cm x 606 cm 27,8 m2 204 cm 267/370 cm 25° - - - -
KATE 458 cm x 73 cm 3,3 m2 - - - - - - -

A x B : 458 cm x 606 cm

M2 : 27,8 m2

H1 : 204 cm

H2 : 267/370 cm

: 25°

: -

: -

: -


A x B : 458 cm x 73 cm

M2 : 3,3 m2

H1 : -

H2 : -

: -

: -

: -

: -

Options & Accessories



Not available


Tag Type Notes Upload date Link
Online 3D-configurator Link Configure your JANSSENS-greenhouse online! 2021/03/15
Brochure 2021 Brochure Download brochure 2021 2021/03/15
Foundation drawing KATHEDRAL Foundation Basic dimensions outside base profile on KATHEDRAL 2021/03/17
Assembly instructions KATHEDRAL Manual-PDF Guiding details for professionals: assembly KATHEDRAL 2021/03/17
Assembly instructions accessories Manual-PDF Instructions for assembly of accessories (not all models) 2021/03/17
Assembly instructions HELIOS Animation-3D Instructions for assembly based on a HELIOS SENIOR/MASTER (may lead to insight on other models as well) 2021/03/17
Assembly instructions accessories Animation-3D Instructions for assembly of accessories (doors, windows, ...) 2021/03/16
Adjustment hinges Animation-3D Instructions on how to adjust hinges on a hinged door 2021/03/17
Automatic opener roofwindow Animation-3D Animation automatic opener roofwindow 2020/03/31
Automatic opener louvre window Animation-3D Animation automatic opener louvre window 2020/03/31
Automatic opener roofwindow STORM Animation-3D Animation automatic opener roofwindow STORM 2020/03/31
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  • 2500 Lier

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