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Portable Polytunnel Greenhouse Steel Frame Walk-in 18 m Green

First Added - February 27 2022
Last Updated - August 29 2024 - 10 Data Points Updated - 4 Data Points Added
Reviewed & curated by a panel of garden building experts. Using methodology 1.1

60
Average Ranked in the Top 97% of Greenhouses.
Position 803 of 836 Greenhouses - Down 31 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.

In-Depth Review of the Portable Polytunnel Greenhouse Steel Frame Walk-in 18 m Green

The Portable Polytunnel Greenhouse Steel Frame Walk-in 18 m is a unique offering within the greenhouse market, especially for gardeners seeking a solid yet affordable solution for plant growth. With dimensions of 19′ x 9′ and featuring 8 windows, this greenhouse has been designed with the intent of providing ample space while maintaining a level of accessibility and ventilation. While it may not hold the highest expert scores, it has garnered attention primarily for its value for money, making it a strong contender for novice gardeners or those operating on a budget.

Material and Construction Quality

One of the most crucial aspects of any greenhouse is the quality of materials used in its construction. The Portable Polytunnel Greenhouse is made of steel cladding, a common material that offers a decent balance between strength and affordability. However, our expert assessments resulted in a score of 2.5 out of 5 for material and construction quality. This score suggests that while the steel is reliable, it may not withstand harsher environmental conditions as effectively as higher-rated options.

Additionally, the greenhouse is untreated, which suggests potential vulnerabilities to corrosion and other environmental stressors over time. You might want to consider applying your own protective coating if you opt for this model, particularly if you live in a damp or high-wind area.

Window and Ventilation Features

Windows play a pivotal role in promoting air circulation, and the Portable Polytunnel includes 8 windows sized at 600mm x 300mm. While this is slightly below the average for models in its size category, the design allows for reasonable ventilation and light influx. With such inclusion, it fosters an environment conducive to healthy plant growth, ensuring that your plants do not suffer from overheating or stagnant air.

Size and Availability

The dimensions of this greenhouse are quite practical. At 600 cm long and 300 cm wide, it provides sufficient space for various gardening projects. The height of 2000mm (7′) may be slightly less than the competition, but it remains comparable enough for most home gardening needs. Each aspect of its dimensions fits into a moderate footprint, ideal for both smaller gardens and those looking to make a dedicated gardening space.

Value for Money

One of the standout features of the Portable Polytunnel Greenhouse is its exceptional value for money. Our experts scored it 5 out of 5 in this category, indicating it’s an economical choice relative to the quality it offers. Priced at approximately £336.64, this model is considerably less than some high-end alternatives, making it a compelling choice for budget-conscious gardeners. Plus, being priced lower than the average model with similar specifications provides a great entry point for gardening novices or casual horticulturists.

Competitors

When considering the Portable Polytunnel Greenhouse, it’s prudent to examine comparable options. For instance, the vidaXL Portable Polytunnel Greenhouse could save you £183 while maintaining similar ratings, and the top-scoring competitor, the 8’x20′ Palram Canopia Bella Large Walk In Greenhouse, boasts an expert score of 87 but at a much steeper price point of £1,629. This naturally raises questions about the trade-offs you are willing to make regarding price versus features.

Expert Recommendations

Our analysis indicates that if you live in particularly windy areas, seeking out a greenhouse with thicker materials might be beneficial. The Portable Polytunnel falls short in this area; thus, for those in harsher climates, models like the Marlborough Greenhouse series might be worth considering. If you’re gardening in moist coastal environments, opting for a greenhouse made of either treated wood or plastic could provide better durability over time.

Final Verdict

In summation, the Portable Polytunnel Greenhouse Steel Frame Walk-in 18 m Green serves as a practical choice for amateur gardeners or those with limited budgets. It excels in value, while its dimensions and basic structural elements are satisfactory for standard gardening tasks. However, the lack of advanced treatment and average material choice may not inspire confidence for those looking for durability in harsher conditions. Ultimately, if low investment and ease of use are what you seek, this greenhouse might just be the right fit for your gardening aspirations.

Product Details

Building Type
Greenhouses, Large Greenhouses, Metal Greenhouses, Narrow Greenhouses, Polytunnel Greenhouses, Pop-up Greenhouses
Metric Size (Meters)
19' x 9'
Material
Metal
Number of Windows
8
Cladding Type
steel
Treatment Type
Untreated

Q: What are the dimensions of the additional door, and how do they benefit me?

A: The additional door measures 1600mm in width and 1500mm in height. This generous size allows for easy movement of larger items in and out of the building, which is incredibly beneficial if you plan to use the space for hobbies that involve bulky equipment or furniture. I find this feature particularly helpful for garden storage or workshop settings, where space optimisation is key.

Q: How tall is the overall structure, and does that impact its usability?

A: The additional height of the building is 2000mm, which is quite comfortable for most users. This height ensures that even taller individuals can stand freely without feeling cramped, making the space more inviting. In my experience, having adequate headroom enhances the overall functionality, especially if you’re considering activities that require movement or storage at various heights.

Q: What is the size of the windows, and how do they affect the interior lighting?

A: The windows measure 600mm x 300mm, which is a decent size for natural light penetration. Well-placed windows can significantly brighten up the interior, making it a more pleasant environment to work or relax in. However, I do note that the area of glass may not be sufficient for everyone, especially in darker months, so consider adding reflective surfaces or additional lighting for those grey days.

Q: Can you explain the materials used in the structure and their durability?

A: The primary fabric used is 99% polyethylene, which is known for its robustness and resistance to the elements. This makes the structure durable and suitable for outdoor settings, protecting your belongings from moisture and UV damage. I appreciate that this high-percentage polyethylene not only extends the life of the building but also requires minimal maintenance, making it a solid investment for long-term use.

Q: What are the dimensions of the building as a whole, and how does that affect its placement in my garden?

A: The complete base size of the structure is 600cm in depth, 300cm in width, and a height of 200cm. This compact size makes it versatile enough for most garden spaces, whether you have a large estate or a modest backyard. I find that this dimension strikes a good balance; it provides ample usable space without overwhelming your garden's aesthetic. However, before installation, it's wise to consider local regulations or spatial limitations in your outdoor area.

Q: Is the height of the building a potential drawback?

A: While the height of 2000mm may be sufficient for most, taller users might find it slightly restrictive. If you need to install shelving or other high-mounted equipment, you might need to consider how this could affect your storage options. I often recommend measuring the tallest items you intend to use in the space to ensure they fit comfortably without compromise.

Comparisons of Similar Sheds

vidaxl-portable-polytunnel-greenhouse-steel-frame-walk-in-18-m-L-356281-5596821_1walk-in-greenhouse-with-4-shelves29205-serial-number-L-18867499-37065219_1
Expert Score 6063
Price £153.99£5,830.89
Size 19' x 9'3' x 2'
Brand Vida XlMarlborough Combi Summerhouses
Material MetalMetal
Cladding Thickness
Guarantee 10 Years
GoGo
Joel Bird

Joel Bird

Profile

Meet Joel, our expert in shed construction and design. Winner of the 2014 Amazing Spaces Shed of the Year on Channel 4 from over 10,000 entries and a subsequent judge on the show, Joel is also the author of The Book of Shed and a regular guest on prominent TV and radio shows. Click ‘Meet the Experts’ below to uncover more about Joel’s pioneering work.

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