Frequently Asked Questions (FAQs)

Our WIndsor Series has been designed specifically for high wind areas/acreage. These greenhouses boast a heavy box-section aluminium framework, unlike anything else seen on the domestic greenhouse market here is Australia. The are available with either 10mm twin wall polycarbonate glazing OR 4mm toughened safety glass. The glazing is held in place using high quality UPVC bar capping, the unbeatable method for high winds. This method is seen on the finest UK greenhouses and sold exclusively by GrowFresh Greenhouses here in Australia. The Windsor Series is available in 3 width variations, the 2.3m wide Windsor Compact, the 3m wide Windsor Junior or the 3.7m wide Windsor Royale. Here is the link- https://growfreshgreenhouses.com.au/collections/supreme-greenhouses

Twin-wall polycarbonate glazing is very attractive in appearance and is available for all our greenhouse models, for garden safety and heat efficiency. Virtually unbreakable and very easy to handle, it is up to 200 times stronger than glass. Twin-wall polycarbonate has two outer walls with an air gap in between, giving it a double glazing effect. The bigger the air gap, the higher the thermal insulation. Unlike glass which heat is drawn out of very quickly, warm air is trapped in the air gap of the polycarbonate, helping retain the temperature more efficiently. This allows gardeners to extend their growing season, get a head start on seedlings, and also experiment with more tropical and warmer climate plants. Our greenhouses are available with 6mm twin wall or 10mm twin wall polycarbonate, depending on the range. If you are in an area that experiences very cold winters and even frosts, we strongly suggest you consider the thicker 10mm polycarbonate (either our Dorset Grande under ‘Hobby Collection’ or our Windsor Series under ‘Supreme Collection’). If you live in a somewhat milder climate, the 6mm might be a good choice for you (the Dorset Classic under ‘Hobby Collection’ and the Stately ranges under ‘Deluxe collection’). The best bit about our polycarbonate is that it is superior to anything else being sold on other greenhouses here in Australia. We are the ONLY company to be offering UV2 technology on multiple ranges. Our GrowLux UV2 has 100micron protection, 50micron each side! When our GrowLux UV2 polycarbonate is processed from the raw granular material, it is heated and extruded into sheets. During the extrusion process, our GrowLux UV2 polycarbonate is formed and moulded with a UV protective treatment, resulting in a co-extruded protective layer on BOTH SIDES. This means when assembling your greenhouse or other structure using our polycarbonate, either side can face the sun! All other polycarbonate greenhouses currently being sold here in Australia are protected with only 20—50micron, and only on ONE side. If you accidently place these sheets the wrong way, your polycarbonate will not last at all. Investing in a greenhouse with UV2 technology will save you money in the long term as the polycarbonate lifetime is increased by 20-30% over standard polycarbonate being sold on other greenhouses. Polycarbonate should not be confused as being acrylic as this is a much cheaper and inferior product. Polycarbonate belongs to the group of plastics called thermoplastic polymers. 

R-VALUES (r value measures thermal insulation)

4mm Toughened Glass- R1.0

6mm Twin Wall Polycarbonate- R1.54

10mm Twin Wall Polycarbonate- R1.89

PROS & CONS

-GLASS

Pros- Aesthetically pleasing/ Longevity (glass will not break down under UV exposure)/ Easy to clean

Cons- Low thermal efficiency, more costly than polycarbonate, can be broken with stone chips from mower etc.

 -TWIN WALL POLYCARBONATE

Pros- Attractive appearance, great thermal properties, virtually unbreakable, affordable, offers more privacy than glass

Cons- Shorter lifespan than glass (the best quality polycarbonate will give you 10-15 years, it is the nature of the product to eventually breakdown under prolonged UV exposure. A poor quality polycarbonate as sold by many of our competitors may only last you 1-2 years).

When we refer to a greenhouse, we are talking about twin-wall polycarbonate glazing. A glasshouse is glazed with 4mm toughened glass. There are pros and cons for both and we explore this below. We also note r-values for all glazing options. R-values are a measure of thermal insulation.

R-VALUES (r value measures thermal insulation)

4mm Toughened Glass- R1.0

6mm Twin Wall Polycarbonate- R1.54

10mm Twin Wall Polycarbonate- R1.89

PROS & CONS

-GLASS

Pros- Aesthetically pleasing/ Longevity (glass will not break down under UV exposure)/ Easy to clean

Cons- Low thermal efficiency, more costly than polycarbonate, can be broken with stone chips from mower etc.

 -TWIN WALL POLYCARBONATE

Pros- Attractive appearance, great thermal properties, virtually unbreakable, affordable, offers more privacy than glass

Cons- Shorter lifespan than glass (the best quality polycarbonate will give you 10-15 years, it is the nature of the product to eventually breakdown under prolonged UV exposure. A poor quality polycarbonate as sold by many of our competitors may only last you 1-2 years).

HOBBY COLLECTION
Dorset Classic 2.5m Wide- 6mm Polycarbonate Series
Best Suited To Suburban Backyards/Residential Areas (Perfect For Mild/Cool Climates)
Dorset Grande 3.0m Wide- 10mm Polycarbonate Series
Best Suited To Suburban Backyards/Residential/Semi Rural (Ideal For Colder Climates)

DELUXE COLLECTION
Stately Classic 2.8m Wide- 6mm Polycarbonate 
Stately Deluxe 3.4m Wide- 6mm Polycarbonate
Best Suited To Residential/Semi Rural/Acreage/Windy Areas (Perfect For Mild/Cool Climates)

SUPREME COLLECTION
Windsor Compact 2.3m Wide- 10mm Polycarbonate
Windsor Junior 3.0m Wide- 10mm Polycarbonate
Windsor Royale 3.7m Wide- 10mm Polycarbonate
Suitable For All Properties Including Open/Exposed Areas/Acreage/High Wind Areas (Perfect For Cold Climates) 

LIFESTYLE COLLECTION
Grandiose Orangery 4.5m Wide- 10mm Polycarbonate
Suitable For All Properties Including Open/Exposed Areas/Acreage/High Wind Areas (Perfect For Cold Climates)