Cathedral Greenhouse

The Cathedral is one of our largest greenhouses, distinguished from other Janssens models by a cupola that adds both height and curb appeal. It features a wider footprint than the Royal Victorian line, making for a significantly more floorspace than even the VI 46. Like all Janssens models its 4mm tempered glass and aluminum frame make it resilient enough to withstand wind gusts and most hail. The Cathedral’s structure is additionally reinforced by thick aluminum portal frames which span its entire width, increasing its durability in sustained winds and snow events. Moreover its doors and windows can be installed nearly anywhere, providing substantial flexibility in design.

If you’re searching for a true backyard showstopper that is both beautiful and durable, the Cathedral is the one to pick.

Please note that we keep a limited stock of Cathedral greenhouses on hand, so lead times may be longer than those of other models.

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: $35,999
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)

Accessories

Comes Standard With

Gutters with Downspout

Can Also Add

Doors

Windows

Shelving

Climate Moderation

Miscellaneous

What Makes Janssens a Quality Brand?

Aluminum profiles are thicker and stronger than most competitors at an equivalent price range
Stainless steel hardware prevents rusting or corrosion of any type
Glazing is 4mm tempered glass where many others use 3mm, granting both greater insulation and resilience to extreme weather conditions (wind and hail)
Glazing panels are held in place with heavy-duty rubber weather seals
Glazing panels are full-sized single pieces, and look much nicer than the overlapping panels sometimes found on other brands
4” high foundation frame is included, where others usually cost extra
Tempered glass is TUV and GS tested

Introducing the Cathedral Greenhouse

@thatplantdad It’s Working! #fyp #foryou #foryoupage #plants #plant #plantsoftiktok #banana #bloom #success #new #news #thatplantdad #positivevibes #welcome #happy #story #storytime ♬ Inspiring Emotional Piano - Metrow Ar

Professional installation for this product may be available in your area via our growing network of independent installers. To learn more, simply give us a call at (512) 407-8500 Ext 701.

Additional Images and Information

Click to display more information and larger image

cathedral greenhouse dimension drawing 1

Cathedral Greenhouse dimension drawimng 2

Can I Use My Greenhouse as an Additional Living Space?

These structures are designed to be a greenhouse first and foremost. As packaged, the greenhouse is not designed to be water/air tight. Greenhouse plants do benefit from a turn of air. You may need to do some extra sealing with silicone on the roof around the glass to achieve watertightness.
The glass is single pane, so there is a good chance for condensation on the inside that might drip. We recommend any furniture be indoor/outdoor and that fine wood furniture/electronics be avoided or sufficiently protected.
The roof windows do have auto openers, so there is always a chance with a summer rainstorm (with the temp above 70) that the windows could be open and it could rain in. You can switch to all manual openers if preferred.
On sunny days, glass greenhouses can get warm very quickly. Depending on your climate, you will likely be fighting the heat in the summer (late spring/early fall).
It has been done, but you will need to make customized adjustments such as extra sealing, climate control, window tinting and heating.