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Outsunny Large Walk-in Greenhouse Poly Tunnel White (4.5L x 2W x 2H (m))

First Added - February 27 2022
Last Updated - August 4 2022 - 11 Data Points Updated - 4 Data Points Added
Reviewed & curated by a panel of garden building experts. Using methodology 1.1

Product ID: SKU: 5055974840324

Size: 4.5' x 2'

Merchants Checked: 12

Available From: 1

Mano Mano
£89.99
See Deal

Support WhatShed: by making a purchase after clicking a link above, a portion of the sale supports this site.

58
Average Ranked in the Top 31% of Greenhouses.
Position 251 of 836 Greenhouses - Up 199 places from previous update.
Quality of materials
Construction quality
Ease of construction
Value for money

See how our panel of industry experts helped create the impartial judging criteria used to calculate the Expert Score.

Our verdict on the Outsunny 4.5 x 2M Walk-in Polytunnel Greenhouse for Garden, Galvanised Steel

The Outsunny 4.5 x 2M Walk-in Polytunnel Greenhouse for Garden, Galvanised Steel is treated using a galvanised process [1].

Base material: steel [2]

Our experts say this has 1 stand out feature. 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 galvanised 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

Amazing, our experts say most of the treatment options used are among the best.

The galvanised treatment process used here is the best type of treatment out of 2 [3] types we’ve identified on same-size greenhouses that you’ll see getting used on 17% [4] (137 of 787) of all greenhouses analysed, as well as being used on 23% [5] (18 of 78) of the top 10% of greenhouses. You’ll also find the galvanised treatment showing up on 37% of 4.5′ x 2′ greenhouses (7 in total [6]), and when taking the average Expert Score of those 4.5′ x 2′ greenhouses (88), the Outsunny 4.5 x 2M Walk-in Polytunnel Greenhouse for Garden, Galvanised Steel is just above the average with an Expert Score of 90.

Read full analysis for treatment.

Cladding

The steel cladding(walls) used here is an about average form of construction for walls and is the only type [7] we’ve identified on same-size greenhouses, that you’ll also see getting used on 19% (152 of 787) of all greenhouses analysed [8], as well as being used on 1% (1 of 78) of the top 10% of greenhouses [9]. You’ll also find the steel cladding showing up on 11% of 4.5′ x 2′ greenhouses (2 in total) [10], and when taking the average Expert Score of those 4.5′ x 2′ greenhouses (90), the Outsunny 4.5 x 2M Walk-in Polytunnel Greenhouse for Garden, Galvanised Steel is the same with an Expert Score of 90.

Read full analysis for cladding.

Window

The 460mm x 390mm windows on this greenhouse are 1% equal than the average 4.5′ x 2′ greenhouse.

Read full analysis for window.

Height

The height of this greenhouse is 2000mm (7′) which is 100% more than the average 4.5′ x 2′ greenhouse, giving you 1,000.0mm (3′) extra headroom.

Read full analysis for height.

Doors

The door height is 1,800.00mm (6′) tall which is 6% or 100.00mm (0.3′) shorter than the average 4.5′ x 2′.
The door width is 1,200.00mm (4′) wide which is 30% or 280.00mm (0.9′) wider than the average 4.5′ x 2′.

Read full analysis for doors.

You Might Also Consider

We found 3 4.5′ x 2′ greenhouses with comparable specifications. The Outsunny 4.5 x 2M Walk-in Polytunnel Greenhouse for Garden, Galvanised Steel has an Expert Score that is 7% higher than average and is £19 less expensive than average. If you are looking for the best value or highest expert scoring greenhouses out of the 3 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 £44 with this Tec Take 3′ x 3′ Metal Greenhouse. It is priced at £69, this is 64% less than this and has an Expert Score of 72, 17 points less than the Outsunny 4.5 x 2M Walk-in Polytunnel Greenhouse for Garden, Galvanised Steel.

The Outsunny 4.5 x 2M Walk-in Polytunnel Greenhouse for Garden, Galvanised Steel is the best scoring greenhouse available out of all 3 4.5′ x 2′ greenhouses we analysed.

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.
Topdeal Greenhouse 100x100x85 cm Galvanised Steel Grey VDTD26999
Outsunny 4.5 x 2M Walk-in Polytunnel Greenhouse for Garden, Galvanised Steel
Hommoo Greenhouse Anthracite 100x100x77 cm Galvanised Steel VD29845

Product Details

Building Type
Cheap Greenhouses, Greenhouses, Large Greenhouses, Metal Greenhouses, Walk-in Greenhouses
Metric Size (Meters)
6' x 14'
Material
Metal
Number of Windows
Has Windows
Treatment Type
Untreated
Door Height (Imperial)
6'
Door Height (Metric)
1800mm
Door Width (Imperial)
4'
Door Width (Metric)
1200mm
Height (Imperial)
2000mm
Height (Metric)
2000mm
Depth
450 cm
Height
200 cm
Width
200 cm
Door Size
120W x 180H (cm)
Base Size
4.5L x 2W x 2H (m)
Note
Not suitable for bad weather conditions
Window Size (Imperial)
460mm x 390mm
Window Size (Metric)
460mm x 390mm
Custom Label
845-073
Pipe Size
Φ18mm
Accessory
4 x pull ropes, 4 x ground nails
Door Size (Imperial)
1200mm x 1800mm
Door Size (Metric)
1200mm x 1800mm

Comparisons of Similar Sheds

walk-in-greenhouse-with-4-shelves29205-serial-number-L-18867499-37065219_1outsunny-walk-in-portable-greenhouse-metal-frame-garden-plant-flower-herb-65ft-L-385786-16499655_1outsunny-portable-polycarbonate-walk-in-garden-greenhouse-aluminum-frame-plant-hobby-outdoor-L-385786-9982990_1portable-polytunnel-greenhouse-steel-frame-walk-in-18-m-L-16659315-29794010_1vidaxl-portable-polytunnel-greenhouse-steel-frame-walk-in-18-m-L-356281-5596821_1
Expert Score 6363636060
Price £5,830.89£112.99£462.99£285.36£144.99
Size 3' x 2'7' x 14'6' x 8'9' x 19'9' x 19'
Brand Marlborough Combi SummerhousesVida
Material MetalMetalMetalMetalMetal
Cladding Thickness
Guarantee 10 Years
GoGoGoGoGo
Joel Bird

Joel Bird

Author

Our resident shed building expert Joel was the 2014 winner of Channel 4’s Amazing Spaces Shed of the Year having beat over 10,000 applicants to win. He returned to the show the following year as a judge. He is also the author of The Book of Shed and has designed & built over 50 small bespoke garden builds. Joel has appeared on various TV or Radio shows include George Clarkes Amazing Spaces, Alan Titchmarsh Love your Garden, Chris Evans Breakfast Show and BBC Radio 4’s Saturday Live.

Meet the experts

Sources

Merchants Checked

12 different sources were used to research information on this product, and 1 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.

ManoMano UK – 922302 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.
Wilko.com – 21232 products checked, found no matches.
Homebase – 35509 products checked, found no matches.
Buy Sheds Direct – 1635 products checked, found no matches.
sheds.co.uk – 1999 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. Galvanised: Galvanising steel or Zinc Galvanised steel as it is sometimes called refers to the process where steel is immersed into molten zinc. This is where a series of zinc-iron alloy forms a series layers via a metallurgical reaction between the iron and zinc, providing a robust coating which is an integral part of the steel.

Galvanised steel is among the most corrosion resistant due to its sacrificial protection and self-repairing properties. According to the Galvanizers Association they say “Hot dip galvanising offers coverage both externally and internally within hollow sections, it self-repairs when damaged, sacrifices itself to protect the base metal, is environmentally sustainable, has good impact and abrasion-resistance and a maintenance-free life of 50 years or more. Galvanised steel is widely used in applications where corrosion protection is needed and can be identified by the crystallised pattern on the surface (often called a ‘spangle’).” 

2. Steel: Is the “world’s most important engineering and construction material” according to the World Steel Accosiation. When it comes to garden structure steel is often a very strong and durable metal, although if it is untreated then it is prone to rust and corrosion. Steel is an alloy of iron mixed with less than 2% carbon and 1% manganese and small amounts of silicon, phosphorus, sulphur and oxygen. When steel comes into contact with water and oxygen there is a chemical reaction and the steel begins to revert to its original form – iron oxide (that’s Rust to the layperson). Steel must be coated in a protective layer to stop this reaction, for most garden applications this consists of powder coating or the more stable and long lasting use of galvanising the steel first. 

3. Treatment types identified: galvanised, untreated 

4. Global treatment data sourced from: All galvanised greenhouses 

5. Top treatment data sourced from: Top 78 galvanised greenhouses 

6. 4.5′ x 2′ treatment data sourced from: 19 4.5′ x 2′ galvanised greenhouses 

7. Cladding types identified: aluminium, steel 

8. Global cladding data sourced from: All steel greenhouses 

9. Top cladding data sourced from: Top 78 steel greenhouses 

10. 4.5′ x 2′ cladding data sourced from: 19 4.5′ x 2′ steel greenhouses 

Product ID: SKU: 5055974840324

Size: 4.5' x 2'

Merchants Checked: 12

Available From: 1

Mano Mano
£89.99
See Deal

Support WhatShed: by making a purchase after clicking a link above, a portion of the sale supports this site.