EXPERT REVIEWED 
FREE DELIVERY 
INSTALATION AVAILABLE Outsunny 6 x 3M Reinforced Walk-in Polytunnel Garden Greenhouse Steel Frame
First Added - February 27 2022
Last Updated - August 4 2022 - 10 Data Points Updated - 4 Data Points Added
Reviewed & curated by a panel of garden building experts. Using methodology 1.1
Product ID: SKU: 5056534554156
Size: 6' x 3'
Merchants Checked: 12
Available From: 1
Support WhatShed: by making a purchase after clicking a link above, a portion of the sale supports this site.
Our verdict on the Outsunny 6 x 3M Reinforced Walk-in Polytunnel Garden Greenhouse Steel Frame
The Outsunny 6 x 3M Reinforced Walk-in Polytunnel Garden Greenhouse Steel Frame is treated using a galvanised process [1]. The windows window used on this particular 6′ x 3′ use a glazing material (Thickness was not specified).
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
Fantastic, 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 3 [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. While you’ll find that the Expert Score of this greenhouse is 2 points lower than the average for galvanised 6′ x 3’s (82 vs the average of 84 [6]), you can be sure it’s not due to the treatment as this one of the highest scoring treatments found on 6′ x 3′ greenhouses. You’ll also find the galvanised treatment showing up on 33% of 6′ x 3′ greenhouses (4 in total).
Read full analysis for treatment.
Cladding
The steel cladding(walls) used here is an about average form of construction for greenhouse walls out of the 2 types [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 25% of 6′ x 3′ greenhouses (3 in total) [10], and when taking the average Expert Score of those 6′ x 3′ greenhouses (79), the Outsunny 6 x 3M Reinforced Walk-in Polytunnel Garden Greenhouse Steel Frame is just above the average with an Expert Score of 82.
Read full analysis for cladding.
Window
The 3450mm x 370mm window on this greenhouse are 143% larger than the average 6′ x 3′ greenhouse. The window height is 370.00mm (1′) tall which is 2% taller than the average 6′ x 3′ with 6.67mm (0.0′) extra height. The window width is 3,450.00mm (11′) wide which is 142% wider than the average 6′ x 3′ with 2,026.67mm (7′) wider width.
Read full analysis for window.
Doors
The door height is 1,840.00mm (6′) tall which is 5% or 92.50mm (0.3′) taller than the average 6′ x 3′.
The door width is 840.00mm (3′) wide which is 41% or 345.00mm (1′) narrower than the average 6′ x 3′.
Read full analysis for doors.
You Might Also Consider
We found 4 6′ x 3′ greenhouses with comparable specifications. The Outsunny 6 x 3M Reinforced Walk-in Polytunnel Garden Greenhouse Steel Frame has an Expert Score that is 6% higher than average and is £143 more expensive than average. If you are looking for the best value or highest expert scoring greenhouses out of the 4 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 £243 with this Outsunny Tunnel Greenhouse Grow House Steel Frame PE Transparent 200x100x80 cm. It is priced at £32, this is 760% less than this and has an Expert Score of 82, 0 points equal than the Outsunny 6 x 3M Reinforced Walk-in Polytunnel Garden Greenhouse Steel Frame.
The Outsunny 6 x 3M Reinforced Walk-in Polytunnel Garden Greenhouse Steel Frame is the best scoring greenhouse available out of all 4 6′ x 3′ 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 1 greenhouses that have a combination of features that can make them more suited to higher wind areas.
Adley 6′ x 4′ Budget Shiplap Greenhouse
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.
Wilko Walk in PE Greenhouse with Cover and Shelf Staging H190 x W120 x D190cm
Outsunny 6 x 3M Polytunnel Walk-in Garden Greenhouse with Zip Door and Windows
Outsunny 6 x 3M Walk in Polytunnel Greenhouse Large Outdoor Grow House w/ Door
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 1 greenhouses that have options that you might find a better fit if this is a concern you have.
Country Living Durlston 6 x 3 Traditional Tall Wall Greenhouse Painted + Installation Aurora Green
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.
Adley 6′ x 4′ Budget Shiplap Greenhouse
Mercia Tall Wall Greenhouse
Country Living Durlston 6 x 3 Traditional Tall Wall Greenhouse Painted + Installation Aurora Green
Product Details
Comparisons of Similar Sheds
Similar Categories
Small GreenhousesMetal GreenhousesPolytunnel GreenhousesHerb GreenhousesNarrow Greenhouses
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, powder coated, untreated ↩
4. Global treatment data sourced from: All galvanised greenhouses ↩
5. Top treatment data sourced from: Top 78 galvanised greenhouses ↩
6. 6′ x 3′ treatment data sourced from: 12 6′ x 3′ galvanised greenhouses ↩
8. Global cladding data sourced from: All steel greenhouses ↩
9. Top cladding data sourced from: Top 78 steel greenhouses ↩
10. 6′ x 3′ cladding data sourced from: 12 6′ x 3′ steel greenhouses ↩