EXPERT REVIEWED 
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INSTALATION AVAILABLE 8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse (2.4x6m)
First Added - August 4 2022
Last Updated - August 4 2022 - 0 Data Points Updated - 61 Data Points Added
Reviewed & curated by a panel of garden building experts. Using methodology 1.1
Product ID: SKU: 702210
Size: 8' x 20'
Merchants Checked: 12
Our verdict on the 8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse
The 8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse comes with an apex style roof, holds a 10 Years guarantee, is fit with lockable single doors that use a lockable locking system, and is treated using a uv protected process [1]. The windows window used on this particular 8′ x 20′ use a twin wall polycarbonate glazing material (Thickness was not specified).
Base material: polycarbonate [2]
Our experts say this has 5 stand out features. A stand out feature is something found on over 70% of the top 10% of products in a particular category or is an exceptionally good feature as rated by our panel of experts.
1. A 10mm thick cladding like the one used on walls of this greenhouse is one of the best rated by our experts.
2. The polycarbonate construction like the one used on the roof of this greenhouse is rated one of the best by our panel of experts.
3. The polycarbonate roof covering found on this greenhouse is rated to be one of the best by our experts.
4. This twin wall polycarbonate glazing material is one that our experts say is one of the best available for windowed greenhouses.
5. A uv protected treatment like the one used on this greenhouse is one our experts are happy to say is one of the best around.
Below is a brief overview of how some of the key points of this greenhouse fairs across the market.
Treatment/Guarantee
The uv protected treatment process used here is one of the best types of treatment out of 2 [3] types we’ve identified on same-size greenhouses that you’ll see getting used on 4% [4] (34 of 787) of all greenhouses analysed, as well as being used on 32% [5] (25 of 78) of the top 10% of greenhouses. You’ll also find the uv protected treatment showing up on 11% of 8′ x 20′ greenhouses (3 in total [6]), and when taking the average Expert Score of those 8′ x 20′ greenhouses (84), the 8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse is just above the average with an Expert Score of 87.
On a plastic greenhouse, the guarantee that the manufacturer offers is usually a very good indicator of the quality of the building. The longer the guarantee the more the manufacturer believes in the quality of the building they have produced. Typically we see manufacturer guarantees for plastic Greenhouses ranging from zero right up to a 15 years guarantee.
This plastic greenhouse comes with a 10 years guarantee. Most plastic greenhouse come with a 5 years guarantee (52.56% of them) [7].
For this particular brand (Palram Canopia) they offer 6 [8] different types of guarantees on their plastic greenhouses, with the 10 years guarantee on this being the longest they offer. The 10 years guarantee is found on 10.34% of Palram Canopia plastic greenhouses [9], with a 5 year guarantee on 82.76% and a 7 year guarantee on 6.90% of its plastic greenhouses. It is great that this greenhouse was given one of the highest guarantees offered by the brand, and this shows the manufacturer has a lot of faith in the overall quality of this part of their product range.
When looking at comparable 8′ x 20′ plastic greenhouses (we found 27 of them) the most popular guarantee length offered by manufacturers was 10 years [10]. 59.26% came with a missing guarantee, 22.22% came with a 10 year guarantee and 18.52% came with a 5 year guarantee.
Read full analysis for treatment/guarantee.
Cladding
The polycarbonate cladding(walls) used here is an about average form of construction for walls and is the only type [11] we’ve identified on same-size greenhouses, that you’ll also see getting used on 9% (69 of 787) of all greenhouses analysed [12], as well as being used on 27% (21 of 78) of the top 10% of greenhouses [13]. You’ll also find the polycarbonate cladding showing up on 7% of 8′ x 20′ greenhouses (2 in total) [14], and if we compare this item against those 2 we find it’s Expert Score is 9% higher than the average score for a 8′ x 20′ polycarbonate greenhouse.
The walls are 10mm thick and we rate this the best thickness out of the 2 found on same-size greenhouses [15]. It is used on 1% of all greenhouses [16] and is also used across 4% of the top 10% of greenhouses [17] we analysed. Further analysis shows us that out of all 8′ x 20′ greenhouses this is the only one to use 10mm thick walls [18].
Read full analysis for cladding.
Roofing
Polycarbonate is the material used for the roofing, our experts rate this one of the best forms of roof material and is the only type we’ve found on same-size greenhouses [19]. This roofing material is used on 8% of all greenhouses analysed, and 50% of the top 10% of greenhouses. 22% of 8′ x 20′ greenhouses (6 in total) use polycarbonate construction for the roof, with this product having an Expert Score 7% higher than the average in this regard.
A 10.0mm thick roof material was used on this greenhouse which is an about average thickness used for a roofing material out of 2 thicknesses identified on same-size greenhouses [20]. It’s used on 1% of all greenhouses and 4% of the top 10% of greenhouses. Our data on all 8′ x 20′ greenhouses shows us this is the only one to use a 10.0mm roofing solution.
Polycarbonate is used as the roof covering. Our experts say it’s one of the best roof covering materials, and is also the only kind identified on same-size greenhouses [21]. It comes fitted on 2% of greenhouses and used on 21% of the top 10% of 8′ x 20′ greenhouses. 7% of 8′ x 20′ greenhouses (2 in total) make use of a polycarbonate material as a roof covering, and when taking the average Expert Score of those 8′ x 20′ greenhouses (85), the 8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse is just above the average with an Expert Score of 87.
Read full analysis for roofing.
Window
Twin wall polycarbonate windows come installed on this greenhouse. As a glazing option, we rate it the best glazing types and is also the only type found on 8′ x 20′ greenhouses [22]. This particular type of glazing is used on 4% of all windowed greenhouses and 12% of the top 10% of greenhouses with windows we analysed. Out of all windowed 8′ x 20′ greenhouses this is the only greenhouse to make use of twin wall polycarbonate windows.
Read full analysis for window.
Height
The height of this greenhouse is 2685mm (9′) which is 34% more than the average 8′ x 20′ greenhouse, giving you 685.0mm (2′) extra headroom.
Read full analysis for height.
Doors
The door height is 1,880.00mm (6′) tall, which after analysing all 8′ x 20′ greenhouses, matches the average exactly.
The door width is 805.00mm (3′) wide, which when compared to all other 8′ x 20′ greenhouses is exactly average.
Read full analysis for doors.
You Might Also Consider
We found 2 8′ x 20′ greenhouses with comparable specifications. The 8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse has an Expert Score that is 9% higher than average and is £10 more expensive than average. If you are looking for the best value or highest expert scoring greenhouses out of the 2 with comparable specifications the following might be of interest.
Best value – If you are looking for something comparable that costs less, then you could save £450 with this Greenhouse Polycarbonate, Arrow 18 m², 3×6 m, Silver Silver. It is priced at £2,119, this is 21% less than this and has an Expert Score of 72, 15 points less than the 8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse.
The 8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse is the best scoring greenhouse available out of all 2 8′ x 20′ greenhouses we analysed.
High Wind Area – If you live in a particularly exposed or high wind area then having a greenhouse with a thicker cladding and higher than average frame thickness can be preferable. We found at least 3 greenhouses that have a combination of features that can make them more suited to higher wind areas.
Marlborough Greenhouses 20′ x 8′ Wooden Greenhouse with 4 windows
Marlborough Greenhouses 24′ x 6′ Wooden Greenhouse with 4 windows
Marlborough Greenhouses 22′ x 8′ Wooden Greenhouse with 4 windows
Coastal Consideration – If you live in a particularly wet or harsher environment such as by the coast then you might want to consider something with a more robust pressure treatment or something made from metal or plastic, both materials that are particularly suited to such harsh environments. We’ve found at least 3 greenhouses that have a combination of features that can make them more suited to higher wind areas.
8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse
8’x20′ Palram Canopia Bella Large Walk In Silver Aluminium Framed Greenhouse
Palram Canopia Rion Hobby Gardner 8×20 Green Greenhouse
Public-Facing – Extra security measures might be more of a concern if you’re placing your building in an area that is more public-facing than a garden. Features such as security windows or even having no windows at all, and the ability to lock all opening doors are usually much more important when you have something that is more public-facing. We found at least 3 greenhouses that have options that you might find a better fit if this is a concern you have.
8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse
8’x20′ Palram Canopia Bella Large Walk In Silver Aluminium Framed Greenhouse
Marlborough Greenhouses 20′ x 8′ Wooden Greenhouse with 4 windows
More Child Friendly – If you have children and you are looking for something that has that little extra in terms of durability then tougher glazing options might be a better option. Here we have at least 3 other options that will fill those needs.
8’x20′ Palram Canopia Glory Grey Large Polycarbonate Greenhouse
8’x20′ Palram Canopia Bella Large Walk In Silver Aluminium Framed Greenhouse
Palram Canopia Rion Hobby Gardner 8×20 Green Greenhouse
Product Details
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Sources
Merchants Checked
12 different sources were used to research information on this product, and 3 contained information that we were able to use to compile the data used on this page.
The following merchants were checked on the 06 August, 2022 to see if they stocked this product.
Homebase – 35509 products checked, found 1 match.
Buy Sheds Direct – 1635 products checked, found 1 match.
sheds.co.uk – 1999 products checked, found 1 match.
Waltons – 231 products checked, found no matches.
Wickes – 19576 products checked, found no matches.
B&Q – 78905 products checked, found no matches.
ManoMano UK – 922302 products checked, found no matches.
Wilko.com – 21232 products checked, found no matches.
BillyOh – 1244 products checked, found no matches.
Garden Buildings Direct – 1284 products checked, found no matches.
Shedstore – 1373 products checked, found no matches.
Tiger Sheds – 635 products checked, found no matches.
1. UV treated: The British Plastics Federation says that the addition of light stabilisers (they are called hindered amine light stabilisers (HALS)) in plastics are used “to inhibit the reactions in plastics which cause undesirable chemical degradation from exposure to UV light.” This chemical degradation from exposure to UV light is often seen as chalking or a white residue that forms as the polymers degrade over time. This degradation can often be avoided by adding HALS that are UV absorbers such as benzotriazoles, benzophenones or organic nickel compounds. By incorporating weathering stabilisers into the plastics used the damaging effects of UV light will be slowed down considerably. ↩
2. Polycarbonate: Is one of the toughest plastics available. The excellent toughness and thermal stability make Polycarbonate one of the most widely used thermoplastics. This durability makes this ideal for garden equipment and extremely durable plastic garden structure. Polycarbonate is also used for things such as riot shields, vandal proof glazing, safety helmets and headlamp lenses.
According to data from the British Plastics Fedaration the physical properties of Polycarbonate are that it is very good when exposed to high heat with a maximum continuous use temperature of 125 °C. This is coupled with the outstanding Notched Impact Strength data of 60 – 80 Kj/m². ↩
3. Treatment types identified: untreated, uv protected ↩
4. Global treatment data sourced from: All uv protected greenhouses ↩
5. Top treatment data sourced from: Top 78 uv protected greenhouses ↩
6. 8′ x 20′ treatment data sourced from: 27 8′ x 20′ uv protected greenhouses ↩
7. Global guarantee data sourced from: All 10 years greenhouses ↩
9. Guarantee data sourced from: Palram canopia 10 years greenhouses ↩
10. 8′ x 20′ guarantee data sourced from: 27 8′ x 20′ 10 years guaranteed greenhouses ↩
11. Cladding types identified: polycarbonate ↩
12. Global cladding data sourced from: All polycarbonate greenhouses ↩
13. Top cladding data sourced from: Top 78 polycarbonate greenhouses ↩
14. 8′ x 20′ cladding data sourced from: 27 8′ x 20′ polycarbonate greenhouses ↩
16. Global cladding thickness data sourced from: All 10mm greenhouses ↩
17. Top cladding thickness data sourced from: Top 78 10mm greenhouses ↩
18. 8′ x 20′ cladding thickness data sourced from: 1 8′ x 20′ 10mm greenhouses ↩
19. Roof material types identified: polycarbonate ↩
20. Roof thickness types identified: 10mm ↩
21. Roof covering types identified: polycarbonate ↩
22. Glazing material types identified: twin wall polycarbonate ↩