Description
Save 19% on the 20′ x 10′ Forest Timberdale Windowless Double Door Apex Shed. Pressure treated, modular, FSC® timber, 25-year guarantee, with strong secure storage.
A Timber Shed Made for Proper Storage
Some garden buildings are fine for a few bits and bobs, but this 20′ x 10′ Forest Timberdale shed is built for people who need real space. It gives you room to store tools, bikes, garden furniture, machinery, boxes, and all the stuff that never seems to fit anywhere else. Because it is windowless and fitted with double doors, it also makes a good choice if security and easy access matter to you.
Forest Timberdale is part of the brand’s premium range, and this model is designed and built in Worcestershire by a major UK wooden garden building manufacturer. That matters more than it sounds. You are not just buying a shed, you are buying a structure made with proper timber, careful framing, and a build that is meant to last. It is a big shed, yes, but it does not feel flimsy or awkward. It feels like something you can actually use every day.
What You Get with the Timberdale Range
The Timberdale name is used for a reason. This range is known for a more substantial build than many standard sheds, and this particular model shows that in a few clear ways:
- 12mm tongue and groove boards for the walls, floor and roof
- 28mm x 56mm framing for added strength
- Pressure treated timber to help protect against rot
- FSC®-certified wood from managed forests
- 25-year anti-rot guarantee
- Modular panel construction for easier assembly
- Windowless design for added security
- Double doors for wide access
That list gives you the key facts, but the real value is in how those features work together. The thick boards, solid framing and modular build all point towards a shed that is meant to cope with everyday use, not just sit quietly at the back of the garden looking pretty.
Why the Build Feels Different
One of the main reasons buyers look at Timberdale sheds is the construction. The walls are made from 12mm tongue and groove boards, which are better known for strength and a tighter fit than plain overlap boarding. That tongue and groove joint helps the boards sit together more securely, which can improve weather resistance too. It’s the sort of thing you might not notice on day one, but you do notice later when the shed feels steadier and less “hollow”.
The framing is also a big point here. With 28mm x 56mm internal framing, this shed uses more timber than many standard models. Forest says it uses around 30% more timber than standard sheds, and while that sounds technical, in normal terms it means the shed has a more robust feel. It is better suited to regular use, heavier items, and the kind of garden storage that has to work all year round.
There is also the matter of the floor and roof. Both are made from 12mm tongue and groove, which is a decent sign that the whole structure is being treated as a proper building, not just a box with a roof on it. The floor is designed to deal with regular footfall and heavier stored items, so if you are rolling in toolboxes, sacks, or larger equipment, it should be up to the job.
Security Without the Fuss
Windowless sheds often appeal to people who want storage to stay private. No windows means there’s less for passers-by to see, and that can be a useful extra layer of security. For many buyers that’s a simple point, but an important one. If you are keeping bikes, tools, or garden machinery inside, you may prefer a building that doesn’t advertise what is in it.
The double doors are ledged and braced, and they come with exterior turn buttons, interior bolts and a rim lock door latch. That gives you a decent level of door security, while still making access easier than with a single narrow door. If you have a mower or larger items to store, you will appreciate the wider opening. It sounds obvious, but a lot of people don’t think about this until they’re trying to drag something bulky into a tight shed and regretting it.
The high roofline is another quiet benefit. It gives you more headroom, which helps the shed feel less cramped and makes storage a bit more flexible. Tall shelves, hanging tools, or just the simple ability to stand up more comfortably can make a big difference in daily use.
Modular Design: Easier Assembly, More Flexibility
The Timberdale’s modular construction is one of its more practical features. Instead of arriving as one difficult-to-handle structure, it comes in smaller interchangeable panels. That makes assembly less of a wrestling match, which is always welcome with larger sheds. It also means the doors can be positioned in different places, so you can decide what layout suits your garden best.
That kind of flexibility matters. Not every garden is laid out neatly, and not every corner gives you the same access. Being able to choose where the doors go can make the shed easier to fit into your space. It might save you a lot of awkward stepping around plants, fences, paths, or other buildings. It’s practical stuff, but practical is what people usually want when they are spending money on a shed.
Assembly instructions are included, and the modular format is intended to make the build more straightforward. It is still a large garden building, so you will want a level base and some patience, but the design is clearly meant to help rather than frustrate.
Weather Protection and Everyday Durability
A shed has one main job: protect what is inside it. On that front, the Timberdale does a lot of the right things. The roof is covered with high-grade polypropylene-backed felt, which is used to give extra weatherproof protection. That matters in a country where rain can turn up when it likes, often just as you’ve put something outside for five minutes.
The shed also sits on pressure-treated bearers. These help lift the structure and create a barrier against ground moisture, which is a useful detail if you want to keep the floor in better condition over time. Moisture from the ground is one of the quiet causes of trouble in timber buildings, so bearers are not just a small extra, they are part of the long-term picture.
Because the timber is pressure treated, you do not need to keep retreating it in the same way as untreated wood. That saves time, and it also makes ownership simpler. The shed is backed by a 25-year anti-rot guarantee, which gives some reassurance that Forest is expecting the product to hold up over time. Of course, any wooden building still benefits from sensible upkeep and a proper base, but the pressure treatment does remove a lot of the usual maintenance worry.
A Base Matters More Than People Think
If you are buying a shed this size, the base is not a side note. It is a major part of how well the building will perform. A good shed on a poor base can still cause problems, and people sometimes find that out the hard way. The Timberdale can be installed on different base types, including a wooden shed base kit or a plastic shed base kit.
The wooden shed base kit is a faster DIY option than laying slabs or concrete. It uses UC4 incised timber that has been pressure treated and is guaranteed against rot for 15 years. Its size is listed as 7.5cm (h) x 300.6cm (w) x 590cm (d). That can make life easier if you want a straightforward framework solution.
The plastic shed base kit is another practical choice. It is made from 100% recycled plastic, which is handy if you want something more eco-friendly. It is interlocking, quick to install, and can be reused if the shed is moved later on. It also allows for ventilation and drainage underneath, helping keep the shed floor drier. The kit contains 91 squares plus heavy-duty weed membrane, and each square measures 500 x 500 x 40mm.
One important detail: the plastic base must be prepared on firm, level ground, with gravel as recommended. It cannot just go on grass and hope for the best. That would not be suitable, and the installers will not be able to assemble the building if the base is wrong. It’s one of those unglamorous but necessary bits of the job.
White Glove Delivery and Less Hassle
Big sheds can be a headache to get into place, so delivery is worth looking at closely. Forest offers a White Glove Service that delivers the shed free to most UK addresses and places it straight into your garden, with packaging removed. That is a proper convenience, especially if you do not want piles of cardboard and timber bits cluttering up the drive.
There is also optional professional installation available at extra cost. For some customers, that will be worth it just for peace of mind. A building this size is not everyone’s idea of a weekend project, and having it installed can save time and reduce the chance of mistakes. If you are fairly handy, you may still choose to build it yourself. If not, the extra service is there.
Who This Shed Suits Best
This shed suits a few different types of buyer. If you want a secure storage building for garden tools and equipment, it fits the brief. If you need a large workshop-style space, the high roofline and wide access can help. If you simply want a tidy way to store things out of sight, the windowless design is a useful feature.
It also works well for people who prefer a timber building with a more solid feel. Some sheds look fine but don’t feel as if they will cope with years of use. This one is different in that regard. The thicker boards, proper framing and pressure-treated timber give it a more serious character, without making it overly complicated.
And because the shed is part of a broader Timberdale range, it may suit buyers who want a matching style across different garden buildings later on. That can be helpful if your garden plans grow over time. Maybe you start with storage, then later want a workshop space or something else. It is good when a brand gives you that sort of consistency.
Small Details That Add Up
It is often the smaller details that make a shed pleasant to live with. The diamond-shaped finials on the apex roof add a neat finish without making a fuss about it. The overall look is clean and traditional, so it should sit well in most gardens. The double doors help with loading, unloading, and general access, while the modular build gives you more control over how the shed sits in your space.
Then there is the fact that the timber is ethically sourced and FSC®-certified. For buyers who care about where the wood comes from, that is useful to know. It does not change how the shed works on day one, but it does add some peace of mind about the materials used.
Why It Makes Sense as a Purchase
Buying a shed is partly about storage, but also about reducing everyday clutter and making the garden feel easier to manage. This Forest Timberdale 20′ x 10′ apex shed gives you a lot of practical room, a build that feels substantial, and features that help with security and weather protection. It is not trying to be clever for the sake of it. It just does the useful things well.
For buyers comparing garden sheds, a few points stand out: the pressure-treated timber, the 12mm tongue and groove construction, the 28mm x 56mm framing, the windowless design, and the 25-year guarantee. Add in the modular assembly and delivery options, and it becomes a pretty sensible option for anyone needing serious outdoor storage.
If you are looking for a wooden shed that feels made for regular use, and not just for light storage, this one is worth a close look. It gives you the space, the security, and the sort of build quality that makes a difference over time. And in a garden, that tends to matter more than fancy wording or glossy photos.
In Short
The 20′ x 10′ Forest Timberdale Windowless Double Door Apex Shed is a large timber garden building with a practical design and a solid list of features. It offers modular construction, pressure-treated timber, double-door access, windowless security, and a 25-year anti-rot guarantee. It is backed by FSC®-certified wood, made in Worcestershire, and designed for buyers who want usable storage without the usual fuss.
If you need a shed that can cope with a busy garden, store a fair amount of kit, and look tidy while doing it, this model is a strong contender. Not flashy, not overdone, just a proper timber shed with the right features in the right places.
