This site uses cookies.
About our cookie policy.
10' x 20' Forest Overlap Apex Pressure Treated Wooden Double Door Shed (3.01 x 5.98m)
Product code:
BSD21137
From £0.00
To £483.99

For a large garden shed with spacious storage or a garden workshop which can comfortably house shelves and workbenches yet gives you space to work or indulge in a hobby, take a look at this wooden shed with double doors.
- FLOOR AND ROOF FELT INCLUDED! (roof felt colour may vary)
- Pressure treated with a 15 year anti-rot guarantee
- 7mm square-cut overlap cladding on a 28mm2 frame
- 16mm pressure treated floor
- Lockable double doors and 8 polycarbonate fixed windows
- FSC©-certified wood
- Please note that roof felt colour may vary
- For more information about our shed base option click here
Out of stock
- Accessories
- Specification
- Description
- Why choose a Pressure Treated Shed?
- Trustpilot Reviews
- From The Supplier Forest
- Delivery
Specification
| Brand | Forest Garden |
|---|---|
| Cladding | Overlap |
| Cladding Thickness | 7 |
| Construction Type | Overlap |
| Door Type | Double Doors |
| Framing Size | 28x28mm |
| Size | 10' x 20' |
| Roof Covering | Black Sand Felt |
| Roof Style | Apex |
| Material | Wooden |
| Treatment | Pressure treated |
| Guarantee | 15 years |
| Depth at Base | 6000 |
| Height at Highest Point | 2260 |
| Height at Lowest Point | 1600 |
| Width at Base | 2980 |
| Door Height | 1810 |
| Door Width | 660 |
| Glazing Material | 0.7mm Polycarbonate |
| Locking System | Plate Hasp & Staple |
| Number of Windows | 8 windows |
| Floor Material | Solid Timber Boarded Floor |
| Floor Thickness | 16 |
| Roof Material | OSB (Oriented Strand Board) |
| Roof Thickness | 8 |
Description
If you want a large garden shed with spacious storage or a garden workshop that can comfortably house shelves and workbenches yet still give you space to work or indulge in a hobby, the Forest Garden Overlap Pressure Treated 10x20 Apex Shed with Double Doors will suit your requirements perfectly.
Expertly made in the UK, this spacious wooden shed is built from 7mm square-cut overlap cladding on a 28mm2 timber frame, offering a robust build designed to aid effective rainwater run-off.
Pressure treated and backed by a superb 15 year anti-rot guarantee, this large garden shed requires no further treatment, saving you money and leaving you more time to do the things you enjoy.
Furthermore, the timber comes with an attractive natural finish and is FSC®-certified - the only wood certification scheme endorsed by all of the major environmental charities.
You can store heavier items with complete confidence thanks to the pressure treated 16mm solid timber boarded floor. Above, the 8mm OSB apex roof sports a finial and a sand felt covering so you can rest assured that your garden equipment and outdoor furniture will be protected from the elements.
Storage-friendly access is gained via wide double doors which can be secured by a hasp and staple closure (padlock not included) so your expensive tools and machinery will remain safe from unwanted attention.
In keeping with this security-conscious design, the door boasts a superior double-Z frame, for even greater solidity, as well as hidden hinges which cannot be tampered with from the outside.
If you require a garden workshop, you’ll be pleased to hear that this workshop shed benefits from 4 fixed windows, which provide an abundance of natural light.
Made from lightweight polycarbonate, far safer than conventional glass, these windows are near unbreakable so there’s no need to worry about stray footballs. Furthermore, the windows will maintain their crystal-clear appearance for many years to come, without any risk of fading or discolouration.
This 10x20 shed has dimensions of 230cm x 304cm x 603cm and is supplied with fixtures, fittings and easy-to-follow instructions to help you achieve a simple, straightforward assembly.
This particular model is available with a depth of 10, 15 or 20ft, so you’re sure to find one to suit your own garden storage and workshop requirements.
Free delivery is available to most UK addresses.
- 15 year anti-rot guarantee
- Pressure treated to guard against rot
- 7mm square-cut overlap cladding
- 28mm2 frame
- 16mm pressure treated floor
- Weatherproof sand felt roof covering
- Lockable, braced double doors with hidden hinges
- 8 polycarbonate fixed windows
- FSC®-certified wood
- Free delivery to most UK addresses
Shed Base Option

Plastic Shed Base Kit
Quick and simple to install, the 20x10 plastic shed base kit is ideal for avoiding the hassle of laying slabs or concrete when preparing a base for a new shed. Its interlocking design makes it easy to put together and, though lightweight, it provides a very strong and durable base for the shed. Made from 100% recycled plastic, this shed base is eco-friendly. Also, it can be reused if the shed is repositioned. The base allows for ventilation and drainage under the shed, helping to keep the shed floor dry.
To install the base, simply interlock the square grids together and lay onto a firm, level area of ground. We recommend using 15kg of 10m pea gravel per square (gravel not included). Each square is 500 x 500 x 50mm. This pack contains 91 squares and heavy-duty, commercially-graded weed membrane.
Pressure treated overlap sheds
Why choose a pressure treated shed?
If you’re looking to purchase a new shed and can afford just a slightly higher initial spend, buying a pressure treated shed will save you a lot of time and money in the long term.
At Buy Sheds Direct, our Forest branded pressure treated sheds have a number of features to ensure maximum durability and security; including boarded wooden floors as opposed to OSB; security door hinges; a hasp and staple or mortice lock; and so much more.

Don't be fooled by cheap imitations. Buy a shed to last a lifetime!
Our Sheds
Pressure treatment (treatment is impregnated into the wood). No need to re-treat EVER, saving an estimated £200 in time and treatment costs.
Competitors' Sheds
Light coat of dip treatment, which means you’ll need to re-treat immediately and then re-treat a minimum of every year. So add approximately £25 on top of the price of the shed when comparing costs and 4 hours of your time per re-treatment.
Our ShedsSolid boarded floor providing strength and durability
Competitors' ShedsOSB solid sheet material - prone to warping and rotting
Our ShedsSecurity hinges on doors, Security screws on windows, unbreakable polycarbonate
Competitors' ShedsNone
Our ShedsUnbreakable polycarbonate
Competitors' ShedsBreakable styrene
Our ShedsHasp and staple
Competitors' ShedsTurn button
Our ShedsStraight edge overlap, provides consistency and strength. Less likely to warp and produce gaps in the lap panels
Competitors' ShedsStandard overlap
Our ShedsZ Bracing for extra strength and stability
Competitors' ShedsBasic ledge bracing
Made in the UK
15 year anti-rot guarantee
pressure treated
overlap
Pressure Treatment Process Explained
The Pressure Treatment process for timber has been applied to products for a number of years; the key benefit of this process is that the preservative is forced under vacuum pressure right deep into the heart of the wood and the grain structure. The preservative becomes an integral part of the wood; giving a long life and protection against rot.
This process also means that you never have to apply preservatives to your garden shed, and it allows the natural colours of the timber to show through and so your shed blends easily within your garden. Surprisingly, our Pressure Treated Sheds are only slightly more expensive than our Dip Treated Sheds.
Vacuum
Timber is loaded into chamber and a vacuum empties timber cells of air.
Flooded
Cylinder is flooded under vacuum with preservative.
Pressure
Preservative is forced deep into timber using hydraulic pressure.
Vacuum
Another vacuum extracts excess preservative.
Dry
Timber draws in surface excess of preservative under low pressure, then is left to dry.
NO NEED TO RE-TREAT - SAVING YOU TIME AND MONEY!
Pressure Treatment - Videos
Overlap Pressure Treated Sheds
Step by Step Construction
The Pressure Treatment Process
Trustpilot Reviews
From the Supplier: Forest Garden
"We're proud to be the largest and most trusted manufacturer and distributor of garden timber products in the UK" - Forest Garden

Making British Gardens Great
At Forest, we know a fair bit about fences. And sheds for that matter. In fact, we've been one of the UK's most trusted manufacturer and distributor of quality wooden garden products for over 50 years.
With two sawmills in the UK processing locally-sourced timber, and a Head Office in Hartlebury, Worcestershire, you’ll find our range of garden buildings, fencing, decking and decorative structures for sale across many sites online and in over 3,000 retail stores. From the forest to the doorstep, we are involved every step of the way to ensure we bring you the best product and service.

Home Grown
We're proud to say that the majority of the timber we use is cut in our very own sawmill from trees grown in the UK.
Not only that, but our range is certified by the Forest Stewardship Council and the majority of our products carry the FSC logo - so you know that our timber is ethically sourced from well-managed, sustainable forests that are replanted for future generations.
(Certification number TT-COC-001790, Issue date 5 March 2015)

Well made in Britain
The majority of the timber we use is grown and felled from managed UK forests across Scotland and Wales. After felling, the timber is cut and processed in one of our nearby sawmills and taken to our manufacturing operation in the heart of Britain. It is here our skilled workforce proudly produce the widest range of garden buildings, fencing and structures available in the UK.
All of the products that we sell are dispatched from this site. The final part of their journey is managed by our dedicated delivery department who are responsible for distribution direct to customers' homes by our fleet of vehicles.

Helping Everyone Thrive
We like to do our bit for charity and are proud to support Thrive. Thrive uses gardening as therapy to bring about positive changes in the lives of people living with disabilities or ill health, or those who are isolated, disadvantaged or vulnerable.
Delivery


We offer FREE Delivery to the majority of mainland postcodes. For all fencing and decking orders, we offer FREE delivery for all orders over £200 (£24.99 for orders under £200).
To check you qualify for Pick a Day delivery please use our postcode checker above or within checkout to check delivery is available to your area.

Pick a Day delivery is not available for Scottish postcodes, instead delivery will be 10-15 working days from the date of the order. A delivery surcharge of £49.99 is applicable to the following Scottish postcodes: AB, DD, IV, KW, PA and PH.
Please Note - delivery is NOT available to the following locations: BR8, CO, CT, DN18-41, DT3-7, EX, HU, IP, LA, LN7, LN12-13, NR, PE25, PE30-37, PL, TA20-22, TN23-40, TQ, TR, YO11-18, YO21-25 & Channel Islands, Northern Ireland, Isle of Wight, Isle of Man, Isles of Scilly, Scottish Islands.
The Delivery Process

If you haven't already selected your delivery day in checkout, our delivery team will contact you to arrange a convenient delivery date. If you provide us with a mobile number, we can confirm the day before delivery if your delivery will be morning or afternoon.

Our drivers can leave your delivery in a safe place, please indicate this when selecting your delivery. It is important that the drivers have suitable access and no restrictions. We would not risk damaging your property whilst delivering a product to an un-safe location. Unfortunately, we will not be able to go through your property.

Other than our fence panels (which are delivered fully constructed), all of our products are delivered flat packed, direct to your home and are supplied with a set of instructions to support assembly.
Great rating on trustpilot