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Overview

With its soaring roofline and eye-catching cupola, the Cathedral greenhouse brings height and light to any garden and serves as a grand centerpiece in your landscaping.

The Cathedral features a sturdy aluminum frame and full-length tempered glass for reliable strength and year-round weather protection. The open interior provides space for plants, potting, and relaxation. Adjustable door and window placement allows you to customize the layout.

The Cathedral greenhouse is more than a place to grow. It invites you to live among your plants. Blending European design heritage with modern engineering, it offers a bright, enduring space that elevates both the garden and your time in it.

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Key Features

Belgium Engineering

Designed and manufactured in Belgium

4 mm Tempered Glass Panels

28” wide clear tempered glass glazing

17-Gauge Aluminum Frame

Provides sturdy structural support

Cupola Roof

Adds height and curb appeal

Hinged Doors

Double hinged doors + 1 sliding door

Roof Vents

Support natural ventilation

Push-Out Side Windows

Open outward for airflow

Heavy Duty Portal Frames

Provides extra support

Louvre Windows

Provide additional ventilation
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Specifications

Glazing: 4mm tempered glass panes
Frame: 17 gauge tubular aluminum extrusions
heavy duty portal frame supports
Colors: Black (RAL9005), Bronze (RAL 7006)

Standard Model

  • Suggested Retail: $45,999
  • Length: 19'11" (8 panels)
  • Width: 15' (6 panels)
  • Peak Height: 12'2"
  • Sidewall Height: 6'8"
  • Area: 298 sq. ft.
  • Roof Pitch: 25 degrees
  • Doors: 1 Set of Double Hinged Doors, 1 Sliding Door
  • Windows: 4 Roof Vents, 2 Push Out Side Windows, 2 Louvre Window
  • Window Openers: 4 Spindle (Roof), 2 Automatic (Louvre)

Frequently Asked Questions

Do I need a professional assembler for my Janssens’ glass greenhouse? If so, how do I find one?

Many of the Janssens’ greenhouses are designed to be a DIY assembly by handy homeowners, however, this model may have some challenging sections that it may be better to have a professional assembler do. Hinged doors, knee walls, cupolas, heavy framing, T-shaped models and larger sizes are all things that can add to to level of assembly – depending on the model and options you choose. We do maintain a referral list of independent assemblers, please give us a call or email us and let us know where you are located and your greenhouse and we put you in touch with a couple assemblers in your area. If you prefer to work with someone local -handyman businesses and landscapers are great assemblers too! Exaco does provide all US customer support and we are here to help with any assembly questions that you or your assembler may have. Just give us a call!

What if I need assembly help?

Exaco is here to help! Our friendly customer support staff is REAL PEOPLE who have assembled these greenhouses and are very familiar with the parts and pieces. Please give us a call or email us. We are also able to video calls via Facetime or Google Meet as needed. We want to help you to get through any assembly questions so you can get to the fun part – enjoying your new greenhouse!

Where are Janssens’ greenhouse made?

Janssens has been manufacturing quality greenhouses for over 75 years in Lier, Belgium.

Can someone help me decide which greenhouse is best for me?

Our retailers are great resources to reach out to discuss greenhouses – and our Exaco customer service team is always ready to help your dream greenhouse come to life – we are just a call away. Over the years we have personally supported many customers choose their greenhouse and options – and that expericence goes a long way. You can also find additional resources and inspiration on our blog too.

Do I need a permit?

You might need a permit. Not everyone does and even sometimes those who do need a permit do not apply for one. Each municipality sets their guidelines for what types/size of buildings need a permit in their area – sometimes this is based on square footage or whether they consider it a “permanant structure” – but this is all decided by your local permit office. If you are applying for a permit, you should always go through this process BEFORE you order your greenhouse – depending on local wind/snow load requirements you may need additional reinforcements or supports to reach your local requirements. You may also find other restrictions for placement that may mean you have to limit the size or location. If you are going to get a permit, it is always best to know the restrictions ahead of time.

Do you provide structural certifications for the Janssens greenhouses?

We have general structural certifications for most of our regularly stocked models to give you a realistic idea of the loads of each greenhouse. However, if you are applying for a permit you may need a letter stamped by an engineer certified by your state, or you may need a site specific certification. We do not provide these state or site specific documents, but they are avaialble for a fee. Conversely, we may be able to point you toward an engineer that can assist you with the documentation you need. Keep in mind, each location/state has different load requirements. If you are in a location that has higher load regulations, you may need to purchase additional reinforcements.

Resources & Documentation

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