Glass & GreenhouseFAQ

1. WHAT SURFACE DO I NEED TO BE ABLE TO ERECT A GREENHOUSE?
A flat level surface is essential for a glasshouse construction, but less essential for a greenhouse (plastic clad) construction. The base can be soil, grass, paving, concrete or a combination of these materials.  If the ground is not level then you will be required to adjust your base framework to be level, so that the glasshouse may sit on a level surface.


2. WHAT'S THE DIFFERENCE BETWEEN A GLASSHOUSE AND A GREENHOUSE?
Glasshouses are clad in glass or an option safety crystal clear acrylic called Plexiglas. The greenhouses are clad in Duratough  plastic greenhouse film.  Redpath manufacture and supply both types and each has their advantages. Glass when combined with an aluminum frame offers a timeless quality and can be a genuine asset to your property value. Glass will also offer superior light transmission to the crop when day lengths are short such as in winter and springtime.  A greenhouse on the other hand has advantages in that it is slightly warmer (about 10%) than the glass structures, and can offer higher levels of humidity within the building which can often assist with greenhouse crops and propagation.  A greenhouse covered with our commercial Duratough greenhouse film would not normally require shading in the summertime as the plastic covering offers a diffused style of light with less potential to burn crops like.

3. HOW STRONG IS MY GLASSHOUSE OR GREENHOUSE AGAINST WIND ... AND WHERE SHOULD I LOCATE IT?
You should locate your glasshouse or greenhouse in a semi sheltered location, without direct exposure to extreme wind or wind gusts.  If this is unavoidable - then a shelter belt fence should be considered to help protect the building and its openings (doors, roof vents, windows and cladding) from extreme conditions. A sunny location will benefit most plants. It is simple to provide shade to the plants if required.

4. WHY USE ALUMINIUM FOR THE FRAME?
Aluminum offers a slim line and clean appearance compared to traditional timber frames and promotes good light transmission.  Aluminum will also resist corrosion in the humidity of the glasshouse environment.  Redpaths 10 Year warranty applies to its well proven framework and it will last a lifetime.

5. DO I NEED SOME SORT OF BASE OTHER THAN A FLAT LEVEL SURFACE?
Yes all glasshouses must have a base of some description (unless stated) be it timber, aluminum, brick or block etc. The glasshouse base rail is then attached to this secure base. Please refer to the base dimensions page to view the exact requirements for this.

6. DO I NEED PLANNING PERMISSION FROM THE COUNCIL?
Not usually – however sometimes for the larger models and in some areas it pays to check. Redpath can assist in this area if required.

7. MY GARDEN IS ON AN INCLINE. WHAT SORT OF BASE DO I NEED?
Remember a flat level surface is essential for a glass clad glasshouse construction. You can build from the highest point outwards or the lowest point inwards to bring the site to level.  See question 5 for suggested bases.

8. WHAT CHOICES DO I HAVE FOR GLAZING A GLASSHOUSE?
Redpath offer their range of glasshouses with the standard multi sheet horticultural glass which is 3mm thick.
If further safety for users is required  e.g. if children, pets etc are commonly present then the 4mm glass sheet is a popular alternative option. Ask Redpath to provide a price estimate for this type of material if required.  Note:4mm glass is standard on the Classique model.

9. ARE THERE ANY OTHER ADVANTAGES TO HAVING FULL LENGTH TOUGHENED GLASS?
It is possible to fit full length/height – but some special parts are required to allow this option. Redpath can price this optional extra if required.

10. HOW MUCH VENTILATION SHOULD I HAVE IN MY GLASSHOUSE?
All of Redpaths glasshouses come with at least one roof vent as standard. The Colonial series greenhouses are supplied with roof ventilators for sized 4.8m length and above as standard, and the sizes above 8.4m long have two roof vents. Additional roof vents and louver window vents can be fitted as extra ventilation and automatic vents should also be considered especially if the glasshouse or greenhouse is likely to be left unattended.

11. DO I NEED TO HEAT MY GLASSHOUSE / GREENHOUSE?
Luckily in New Zealand we have a very temperate climate, however some crops will respond well to some additional heat. You may also wish to consider lining the inside of the glasshouse or greenhouse with a poly-liner to provide superior thermal insulation.

12. CAN I COLLECT RAINWATER FROM THE ROOF OF MY GLASSHOUSE?
Redpath glasshouses have aluminium gutter(s) built in as standard which adds additional strength to the existing structure.  Water can then be trained into a barrel or directed into a grid or garden. The Colonial series polyhouses do not include side gutters.

13. IS CONDENSATION A PROBLEM?
Redpath buildings are supplied with steep pitched roof angles to assist with condensation run-off.

14. CAN I EXTEND MY GLASSHOUSE / GREENHOUSE IN THE FUTURE?
Yes, Redpath Glasshouses and Greenhouses are based on a modular design and can usually be extended if you end up requiring more space!

15. CAN I BUY DIRECT?
Yes you can deal direct with Redpath glasshouses and purchase on-line using our secure shopping cart. You can also purchase locally through one of our many agents nationwide.

16. HOW IS MY GLASSHOUSE PACKAGED?
The frame and base come packed in polythene then supported with a sturdy box. Any additional accessories (including extra vents) will be packed separately from the main box.
Redpath will organise the glass to be supplied from a local glass supply company in your area; the cost for the glass IS INCLUDED in the purchase price shown on this site.  If you live more than 50km from one of the many glass suppliers nationwide – you may be required to collect the glass from the local depot.

17. DO YOU DELIVER?
Yes! the price for freight is shown on the shopping cart on this website. Simply select the area that you are based and the price for freight will show, - if you are then ready to purchase then confirm. Redpath glasshouses & greenhouses pack very efficiently and are easily freighted nationwide.

18. ARE REDPATH GLASSHOUSES EASY TO CONSTRUCT?
It does depend on the individual. Approximately 90% of customers do put the glasshouses and greenhouses up themselves.  The glasshouse comes with its own comprehensive instruction booklet and if you do have any difficulties you can always contact us directly where one of our technical support team will be more than happy to assist.  The Colonial series greenhouses may also be ordered in a “Pre-Constructed” form, - this is where we pre make the end walls, base rails , door and other parts in our factory before sending out to you.  The Pre-construction service eliminates approximately 60% of the labour to assemble.  Ask us for a price!

19. HOW LONG DOES IT TAKE AN AVERAGE PERSON TO CONSTRUCT A REDPATH GLASSHOUSE?
For glasshouses it would take on average one day to build the base and another to assemble the structure after which the glass may be fitted.  The Colonial series greenhouse usually takes on day to assemble the frame and another half day to fit the Duratough cladding.

20. WHAT MATERIALS / TOOLS DO I NEED TO BUY IN ADVANCE?
You will need some basic tools
(a) A level
(b) Screw driver
(c) A step ladder
(d) Drill - this again is only needed if you are anchoring the greenhouse down to a patio, or flagged area
(e) Materials to form the base of the glasshouse (for the glasshouse to sit on and attach to)

21. IS THERE ANY TECHNICAL SUPPORT AVAILABLE IF I GET STUCK?
You can always ring the Redpath free-phone number 0508 733 728 if you need any guidance. Or Freefax 0508 733727

22. HOW HARD IS IT TO DISSASEMBLE AND RELOCATE MY GLASSHOUSE OR GREENHOUSE?
Typically you would allow one working day to disassemble any of the Redpath Glasshouses or Greenhouses.  When re-assembly on the new site comes around, then is a good time to repair any worn parts or possibly extend the size of the glasshouse or greenhouse.

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