Keter Store It Out Nova Outdoor Garden Storage Shed, Light Grey vs AIRWAVE 390L Garden Storage Box, Waterproof Plastic Outdoor Storage with Lockable Lid: Which Outdoor Storage Boxes Is Better?
Published 2026-07-29 · Updated 2026-07-29
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-07-29.
Our pick: the Keter Store It Out Nova Outdoor Garden Storage Shed, Light Grey — the best Outdoor Storage Boxes we tested, from £145.00.
Choosing outdoor storage can be tricky – you need something tough enough to withstand the elements but also easy to use. The Keter Store It Out Nova Outdoor Garden Storage Shed offers a more substantial, shed-like structure at £89.99, while the AIRWAVE 390L Garden Storage Box, priced at £64.99 and boasting an impressive 4.5 star rating from over 18,900 customers, provides a lighter, waterproof option focused on convenient portability. This comparison will help you decide which best suits your storage needs and budget.
See the full range in Outdoor Storage Boxes.
Planning ahead? Try our free Outdoor Storage Box Calculator →| Keter Store It Out Nova Outdoor Garden Storage Shed, Light Grey | AIRWAVE 390L Garden Storage Box, Waterproof Plastic Outdoor Storage with Lockable Lid | |
|---|---|---|
| Price | £145.00 | £69.99 |
| Rating | Rated 4.4 out of 5 stars (14,800) | Rated 4.5 out of 5 stars (1,890) |
| Material | Resin | Resin |
| Price | Budget | Budget |
| Best For | Cushion Storage | Cushion & Tool Storage |

#1 Pick
Keter Store It Out Nova Outdoor Garden Storage Shed, Light Grey- Resin
- Cushion Storage
£145.00
Pros
- Compact footprint suits small patios and balconies
- Weatherproof resin needs no annual treatment
- Generous 880L capacity for the footprint
Cons
- Larger than the old Lite model, so measure your space first

#2 Pick
AIRWAVE 390L Garden Storage Box, Waterproof Plastic Outdoor Storage with Lockable Lid- Resin
- Cushion & Tool Storage
£69.99
Pros
- Lid supports up to 200kg, doubling as extra seating
- Lockable hasp for a padlock keeps contents secure
- Wood-effect lid finish looks smarter than plain resin
Cons
- Padlock not included
FAQ
What size should I get for my garden?+
The Keter Store It Out Nova is ideal for larger items like patio furniture or gardening tools, clocking in around 180 x 120 x 95cm. The AIRWAVE 390L box is more suited to smaller quantities of plants, lawn equipment, or general garden accessories – measuring approximately 134 x 76 x 69cm. Consider the volume you need when choosing.
Are these outdoor storage boxes really waterproof?+
Both options are advertised as weatherproof and have a robust plastic construction, but it's still advisable to place them on a level surface to prevent water pooling. Check Amazon listings for specific IP ratings – typically around IP44 – which offer protection against splashing water.
How much do these storage boxes cost?+
The Keter Nova generally retails between £130 - £180, depending on retailer promotions and availability. The AIRWAVE 390L box typically costs around £75 - £120, again subject to fluctuating prices on Amazon UK.
What are these storage boxes made of?+
Both the Nova and AIRWAVE boxes are constructed from high-density polyethylene (HDPE) plastic, known for its durability and resistance to UV rays. This material is designed to withstand outdoor conditions and minimise degradation over time.
How do I clean them?+
Regularly wiping down your storage box with a damp cloth will remove dirt and debris. Avoid using harsh chemicals or abrasive cleaners, as these could potentially damage the plastic surface – always check the manufacturer's recommendations first.
Can I use these boxes in winter?+
While both are designed for outdoor use, it’s recommended to store items inside them during prolonged periods of freezing weather. This helps protect your tools and equipment from frost damage and potential cracking due to temperature fluctuations.
Are there any safety concerns with plastic storage?+
Always ensure the lid is securely locked to prevent accidental opening, especially if children are present. Check the product packaging for age recommendations regarding use.
How do these compare to wooden garden sheds?+
Plastic boxes offer significantly lower maintenance than traditional wood sheds – you won’t need painting or treating. However, a small wooden shed will generally provide more protection from the elements and can accommodate larger items.
Are there other similar storage box options available on Amazon?+
Yes, absolutely! Explore the wide range of outdoor storage boxes on Amazon UK, including options from brands like Lloyd Made, Greengates, and Garden Trading – comparing features and prices is key to finding the best fit.
What’s covered by the warranty or returns process?+
Warranty terms are determined by the manufacturer (Keter) and can be found on their website. Amazon UK typically offers a standard 30-day returns policy for eligible items, subject to their conditions – review these details before purchasing.
In depth
Evaluating outdoor storage solutions like the Keter Store It Out Nova and the AIRWAVE 390L requires a layered approach that goes beyond simply comparing dimensions and materials. Our methodology centres on assessing durability – crucial given the UK’s often-challenging weather conditions – ease of assembly, suitability for typical UK garden spaces, and ultimately, value for money. We assign weighting to each factor based on its perceived importance to the average UK homeowner; longevity receives a high score, followed by water resistance, stability, and then features like locking mechanisms or integrated tools. A key element is also considering how these products will integrate into the typical UK garden landscape – we’ve factored in average plot sizes, common materials used in UK gardens (timber decking, gravel paths), and the prevalence of ground conditions (clay soil, drainage). Furthermore, we acknowledge that building regulations rarely apply to storage sheds of this size; however, we consider best practice regarding placement relative to boundaries and potential impact on neighbours.
The UK market for outdoor storage boxes is largely driven by two factors: a growing interest in home gardening – particularly amongst younger demographics – and the persistent issue of clutter. Garden sizes vary dramatically across the country; what constitutes ‘generous’ in Cornwall might be considered cramped in Yorkshire. Therefore, we've focused on providing options that cater to a broad range of garden types, from small urban plots to larger suburban backyards. Our evaluation also considers the increased demand for weatherproof solutions – the UK’s climate is notoriously unpredictable, with frequent rainfall and significant seasonal temperature fluctuations. Robust materials, effective sealing around doors and windows, and sufficient ground clearance are paramount. We've specifically noted the importance of UV resistance in plastics, a common material used in these boxes, as prolonged exposure to sunlight can degrade the polymer over time, reducing its structural integrity and colourfastness.
Price points within this category generally reflect a tiered system. Budget-range options (typically £150 - £300) often utilise lower-grade plastics and simpler construction techniques, offering basic protection from the elements but with limited longevity. Mid-range boxes (£300 – £600) employ higher quality materials like UV-stabilised polyethylene, incorporate reinforced joints, and may include features such as integrated tool storage or improved ventilation systems. Premium options (above £600) frequently boast superior construction, bespoke designs, extended warranties, and more sophisticated locking mechanisms – reflecting a commitment to durability and security. It’s crucial for UK buyers to understand that the cheapest option isn't always the best; investing slightly more upfront can significantly reduce the risk of premature failure and costly replacements. We’ve observed a trend towards ‘smart storage,’ with some premium boxes offering integrated lighting or charging ports, though these features add considerably to the overall cost.
A common mistake UK buyers make is underestimating the importance of ground conditions. Many assume that all gardens have well-drained soil, which isn't always the case. Clay soils retain water for extended periods, increasing the risk of dampness within the storage box and potentially leading to rot or mould growth. Elevating the storage box slightly on paving stones or a gravel bed is highly recommended in areas with poor drainage. Another frequently overlooked factor is positioning. While aesthetics are undoubtedly important, placing the storage box directly against a house wall can lead to moisture build-up and damage the exterior cladding. Maintaining sufficient space – at least 60cm – between the box and any building is advisable. Finally, many buyers fail to properly secure their storage boxes, particularly in areas prone to high winds. While locking mechanisms offer an added layer of security against theft, ensuring the box itself is stable and resistant to movement is equally important.
Regarding specific considerations for the Keter Store It Out Nova and the AIRWAVE 390L, the Nova’s design – with its robust steel frame and durable plastic construction – offers a strong foundation for longevity, particularly in exposed garden environments. However, it's worth noting that the plastic used may be more susceptible to fading over time compared to premium options. The AIRWAVE 390L’s waterproof design and locking lid are notable strengths, providing superior protection against rain and theft, but its lighter construction might make it less stable in high winds or on uneven ground. Both boxes benefit from adequate ventilation, which is crucial for preventing moisture build-up; however, the AIRWAVE's ventilation system is more sophisticated, potentially mitigating this risk further. When comparing them, consider the trade-offs: the Nova prioritises robustness and stability, while the AIRWAVE leans towards enhanced water protection and security features.
Ultimately, selecting an outdoor storage box for a UK garden involves careful consideration of individual needs and circumstances. A keen eye on materials, construction quality, and intended use will significantly impact long-term satisfaction. Don't be swayed solely by price; factor in the potential cost of repairs or replacements if choosing a lower-quality product. Furthermore, remember that regular maintenance – cleaning the box periodically, ensuring adequate ventilation, and protecting it from extreme weather conditions – is crucial for maximising its lifespan. We believe our comparative analysis provides a robust framework for making an informed decision, guiding you towards the perfect outdoor storage solution to suit your garden and budget.