Prices from
€14,843
for Gigant 4.58m x 4.58m
Gigant Greenhouses – when you need very big and very strong
Gigant Greenhouses have large load bearing beams which enable them to span up to 6m wide under one roof. This range is customisable, you can pick and choose from a wide range of options to make your dream Greenhouse a reality. The great space they offer means they can be used for growing on a commercial scale or maybe having your whole garden under one roof.
Some of the many reasons to buy a Gigant Greenhouse
Basic Price Includes
- Very Strong box section profiles and load bearing beams
- Integral aluminium base profile (under the four walls))
- 4mm clear toughened glass
- Full length rubber glazing strip to secure the glass
- Sliding doors, roof and louvre vents as detailed under the price
- Full length rainwater downpipes
- Stainless steel nuts and bolts
- Decorative finials and ridge crestings (powder coated models only)
- Powder coated frame (if selected) in a standard
- Instruction manual and assembly DVD
- Delivery in kit form by truck
Strong ‘box section’ Aluminium profiles
Base Profile
Roof Glazing Bar
Corner Glazing Bar
Ridge Bar
Gutter Profile
Rubber Glazing Strip
Rainwater Downpipes
Watering sprayline
Decorative finials and ridge crestings
‘Spindle’ roof vents (Not supplied when automatic vent openers are ordered)
Stainless steel nuts and bolts
Price your very own Janssens Gigant Greenhouse
Frame Colours
Type of Finish
Polyester powder coating protects the aluminium frame from tarnishing with exposure to the elements and is available in a wide range of attractive colours. It is a durable long lasting finish, a bit like enamelling.
Add: €330
Aluminium which has not been protected against weathering is called ‘mill finish’, this suits people who just want a working Greenhouse without regard to how it looks.
We have a range of standard colours to choose from but you can also nominate a special colour (using the RAL numbering system) if for example you want to match with the finish of your house nearby.
Select
Mill Finish
(plain aluminium)
Black
(RAL9005)
Green
(RAL6009)
Custom RAL
Custom
Colour
Rubber Glazing Strip
Rubber Glazing Strip (this is to be in the same drawer as powder coating)
Louvre vents
Janssens’ louvre vents are a generous size (opening of 69cm x 93cm) giving great ventilation. The louvre vent frame is always supplied in black, but being a neutral colour it nearly always blends in. Automatic openers are available for louvres but we suggest you automate roof vents but leave louvre vents manual (unless extreme weather is forecast they can be left open in summer and closed in winter). We have allowed for what is considered adequate ventilation by our experience in the basic Greenhouse price but you can never have too much ventilation on a warm summer day.
Glass pane size
More Info:
Janssens offer a choice for most models of 37cm or 73cm wide panes of glass. It is primarily a question of what you like the look of. Some people think narrow panes look nicer, some rather wide panes, it is a matter of personal preference. A Greenhouse with narrow panes does cost more as it has more aluminium and will take a lot longer to build as there are nearly twice as many panes and glazing bars. The narrow pane model is marginally stronger.
We also have available on request K Glass (more thermal efficient) and 10mm twin wall polycarbonate, please ask for the price if these are of interest.
Choices: 73cm (default setting) or 37 cm
Choices: 73cm (default setting) or 37 cm
Storm Bracing
For exposed locations some additional brace bars can be added to increase wind resistance. These brace bars are sold as a package with enough to fit to every glazing bar inside the Greenhouse except the gables. An additional step customers in extremely exposed areas can make is to use silicone when glazing the Greenhouse as this makes the glass part of the structure.
Dwarf Wall Model
A Dwarf Wall Model makes for a very attractive feature in the Garden and has practical advantages too. It means one can build raised beds inside the walls, the temperature in the summer is a little cooler and winter temperatures a little warmer apparently. The wall is normally built and organised by the customer and is not included in the price of the Greenhouse. General instructions are available to download on this website but after an order has been placed we will be pleased without additional cost to give a drawing specific to your order for you to give your builder.
There are three standard heights of wall that the Greenhouse can be manufactured for:
263mm wall
463mm wall
663mm wall
Hinged or Sliding Doors
Sliding doors have been included as standard but here you have a choice to change to hinged. Doors can be fitted to the gable or the side of the Greenhouse.
Hinged doors give a Greenhouse a more traditional look than sliding doors. Janssens’ Hinged Doors are fitted with hydraulic door closers to pull them closed automatically and they are fitted with a lock.
With a Dwarf Wall Greenhouse, if you have a sliding door it slides quite close to the outside face of the wall, and the track that the door slides in is very narrow and must be kept perfectly straight. This means that if you have a builder who will build a nice straight, plum wall with a flat face there is no problem, but if you are for example using stone it will be better to go for a hinged door to avoid problems.
Decorative finials and ridge crestings
Ornate Ridge crestings and finials provide a bit of extra Victorian style bling to your Greenhouse. It isa question of personal preference and you can select your choice here.
Ornate Ridge (included)
Plain Ridge
Low door threshold
Sliding door entrance with lowered threshold
The standard door entrance has a threshold bar going across at ground level which is 118mm high (to step over). For most customers this is not an issue but where a lower threshold is desired – for example for wheelchair access we offer a service to modify the door entrance to be only 40mm.
Customer can place after installation of the Greenhouse concrete slabs or raise the floor level inside and outside to be flush with this so there is effectively no lip.
Dwarf Wall Greenhouses only
The standard door entrance has a threshold bar going across at ground level which is 118mm high (to step over). For most customers this is not an issue but where a lower threshold is desired – for example for wheelchair access you can simply reduce your wall height by up to 100mm so that the door threshold bar will be submerged except for the lip that the door will close against.
Normally the door has a clearance above the outside ground level of about 110mm (the doors open outwards), when you lower your door threshold by 100mm of course the clearance will only be 8 or 10mm (so will only suit ground that is perfectly flat or sloping down away from the greenhouse).
Glass to Ground Greenhouses (or Dwarf Wall Model customers who don’t want to lower their walls)
The standard door entrance has a threshold bar going across at ground level which is 118mm high (to step over). For most customers this is not an issue but where a lower threshold is desired – for example for wheelchair access we can modify the Greenhouse to have longer doors and door posts so you can submerge the door threshold bar to reduce the lip by up to 100mm.
Normally the door has a clearance above the outside ground level of about 110mm (the doors open outwards), when you lower your door threshold by 100mm of course the clearance will only be 8 or 10mm (so will only suit ground
that is perfectly flat or sloping down away from the greenhouse).
that is perfectly flat or sloping down away from the greenhouse).
Decorative Aluminium Panels
Ornate aluminium ‘retro’ panels, available in three designs, which give a stunning look. This option will create an unusual feature in your garden and may be the ideal choice where you want to use the structure for an alternative function instead of a Greenhouse, for example as an artist’s studio.
Panel A
Panel B
Panel C
Accessories
Automatic Vent Openers
Simple devices which open and close roof vents automatically for you according to temperature. They contain an industrial wax‐like substance inside a cylinder which expands and contracts with according to the temperature and pushes or pulls a rod that opens or closes the automatically. The temperature at which they open and close can be adjusted by hand but you cannot manually open the vent. The cylinder containing the wax‐like substance is a consumable item but typically lasts a number of years and can be easily replaced. Generally in windy weather automatic openers are cooled down by the wind and so close the vents.
Thermoforce HD3400 Automatic Vent Openers
This robust opener has a strong closing force. It has a maximum opening of 35cm (14″) and comes powder coated in a black finish. Its opening range is between 15C and 25C.
Bayliss Hydraulic Check Autovents (for more exposed locations)
The Hydraulic Check Autovent has a small hydraulic damper which only allows the vent to be opened slowly but it can shut quickly, thus protecting the roof vent. The hydraulic check Autovent is advisable in areas where severe conditions are encountered. It can be set to start opening at temperatures between 16C and 23C. Supplied with a satin anodised finish.
Seedbeds
Don’t be fooled by the name, a seedbed can fulfil many purposes. First and foremost it provides a comfortable surface on which to pot up and tend to plants. You can use it to display plants on and it gains you additional space in the Greenhouse. A seedbed can be fitted with capillary matting to assist even water distribution among your pot plants or you can fit an electric thermostatically controlled heated mat in it to make a propagator.
Multiple units can be fitted. They can be fitted along the full length of the side and/or across the full width of the gable ends. Each seedbed frame is made from aluminium in the same colour as your Greenhouse and the tongued and grooved plastic panels which make up the bottom are white. The seedbed is 500mm wide
Multiple units can be fitted. They can be fitted along the full length of the side and/or across the full width of the gable ends. Each seedbed frame is made from aluminium in the same colour as your Greenhouse and the tongued and grooved plastic panels which make up the bottom are white. The seedbed is 500mm wide
Shelves
The Janssens shelf is an aluminium section 115mm wide. It is useful for small pot plants and odds and ends like gloves, secateurs and other small odds and ends. A shelf also adds to the already powerful strength of the Greenhouse. It is supplied in the same colour as your Greenhouse.
Shade Screens
Janssens’ attractive shade screen comes in 3m lengths and is fitted like a curtain, it will slide allowing you to pull it over exactly the area you want to give shade to and push it away when you want more light. Equally useful for shade loving plants that do not want direct sunlight or customers who want to enjoy sitting and reading a paper in the shade!
The price is for one screen 3m long in one bay.
Construction Service by Greenhouse Ireland Craftsmen
This model must be built by us, it is not suitable for DIY building. We need to know the location of the site before pricing construction. To obtain a quotation for this Greenhouse that you are pricing please click on the button below.
Our construction service price is based on any foundations, ground works and walls being prepared by the customer in advance of our arrival on site.Details on foundations are available on the instructions tab on this website page, and we will be pleased to discuss any queries you have and if necessary provide further drawings specific to your Greenhouse once an order has been placed.
Our construction service is subject to some terms and conditions (link to the details here):
Our construction service price is based on any foundations, ground works and walls being prepared by the customer in advance of our arrival on site.Details on foundations are available on the instructions tab on this website page, and we will be pleased to discuss any queries you have and if necessary provide further drawings specific to your Greenhouse once an order has been placed.
Our construction service is subject to some terms and conditions (link to the details here):
Delivery
We bring the Greenhouse with us to construct it.
We bring the Greenhouse with us to construct it.
Lead Times
The lead time is the estimated length of time from when your order is placed to when delivery is made. This is a guideline only as lead times may vary according to demand and logistical considerations.
Normal lead time is ten to twelve weeks.
Assembly Instructions
Instruction manual for Carrousel, Pyramid, Gigant and Orangery:
Instruction for Optional Features and Accessories:
Overview of profiles and reference numbers:
Dimensions
Model illustrated is 6.06m x 6.06m
Example:
Width (A)
457cm
Length (B)
606cm
Eaves height (H1)
201cm
Area (m2)
27.69
Ridge Height (H2)
300cm
Max. Doorway Width
Sliding Hinged
144cm 134cm
Optional features (details and price available on request)
Extra doors
Extra Hinged or sliding doors may be added and fitted to the gable ends or sides of your Greenhouse.
Modifications
We can modify your Greenhouse to have an end up against a wall.
We call this an R Model.
We call this an R Model.
10mm twin wall polycarbonate Glazing
Ideal solution if you live in fear of stray stones or sliothars flying – polycarbonate is virtually unbreakable. It is an excellent insulator. You do lose some of the aesthetic appeal of the Greenhouse as it is not clear as glass, images are diffused so you cannot see straight through it. 10mm twin wall polycarbonate is more expensive than the toughened glass which is supplied as standard with our Greenhouses. Brochure available for download:
K Glass
K Glass is horticultural glass with a coating which greatly lowers its K value (heat loss value). With K glass you can have the benefits of insulation without the downside of not being able to see through it clearly. K Glass is the same price as 10mm twin wall polycarbonate but is not toughened so not as strong or as safe as toughened glass (which shatters into tiny pieces rather than big shards) when it breaks. We will be pleased to quote for it on request..
Top hinged side windows
Our louvre windows provide the most cost effective solution for side windows but if you prefer the look and feel of a solid hinged window this option is available.
Keep in touch
No Records