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BillyOh Defender Heavy Duty Tongue and Groove Apex Shed

Tough, reliable, and customisable, the Defender Apex is a resilient shed for any environment. Outfitted with an exterior shell of extremely thick 15mm tongue and groove cladding, and supported by a heavy-duty timber frame, the Defender shrugs off even the most turbulent weather. Pressure-treated wood ensures fantastic longevity, while our modular design allows you to tweak the layout to your needs, and this is all topped by a traditional apex roof. At home no matter where home is, the Defender is a shed without limits.

Size measured in feet

2. Customise

3. Add Extras

Complete your building with optional shelving, guttering, base options, assembly kits and more.

The padlock is a 65mm long shackle which is a high quality security lock with brass finish. The steel hasp and staple is 169mm and is made from electro hardened galvanised steel. It is also supplied with recessed and concealed fittings.

The Silicon and Gun Set uses a silicone sealant which prevents mould and fungal growth and comes complete with a skeleton gun as standard. This product is ideal for sealing in the windows of your garden building!

This is a low cost, convenient solution, perfect if you don't already have your own tools. This kit includes: Hard point saw, Safety goggles, Paint brush, Pocket level, Claw hammer, Rigger gloves.

This unique hasp & staple type shield offers a high level of security by reducing the exposed area of a padlock to the bare minimum. Specifically designed to prevent unwanted entry being gained to sheds, garages & workshops by protecting against break-ins.

Optional Extras:
Total Price:


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  • Thickened shell of 15mm tongue & groove cladding
  • Tongue & groove floor and roof panels
  • Offers a bespoke storage solution with a huge range of sizes
  • Wood is pressure-treated as standard for long-lasting resilience
  • Classic apex roof which provides balanced drainage
  • Extremely accessible double-door
  • Extra headroom with the 6’3” foot eaves height
  • Customisable door and window position with modular design
  • Comes with a 15-year protective guarantee
  • Complete with green mineral roof felt, fixtures and fittings
  • Base Coat Treated for Transit
Overall Dimensions (Includes Roof Overhang)
  • (A) Width: 1.20m (3ft11)
  • (B) Depth: 1.20m (3ft11)
  • (C) Eaves: 1.93m (6ft4)
  • (D) Ridge: 2.29m (7ft6)

Why Buy the Defender Tongue and Groove 15mm Apex Shed?

15 Year Guarantee
15 Year Guarantee

Protects the wood on your building against rot and decay

UK Manufactured
UK Manufactured

Over 20 years of experience in design and production

Complete Durability
Complete Durability

Afforded by a heavy-duty frame and 15mm tongue and groove wood

Adaptable Configuration
Adaptable Configuration

Design your own building by placing the doors or windows on any side

Key Features

Tongue and Groove Cladding

We use our premium tongue and groove cladding on the Defender, with a standard cladding thickness of 15mm for all walls, floor and roof panels which ensures a robust exterior shell.

Extra Thick Framing

The Defender is supported by a robust interior frame, with a beam thickness of 27x44mm. This frame not only provides durable support for the shed but also makes it possible to install heavy shelving and hooks.

High Eaves Height

Store, organise, or come and go with complete ease thanks to the headroom provided by the tall 6’3” foot eaves height. The additional headroom creates a spacious interior that can be equipped with more vertical storage.

Key features
Movable Doors and Windows

Customise your shed using our modular format, which allows you to choose the position of the door and windows. Arrange and install the modular panels in a configuration that suits you.

Pressure Treated as Standard

Not only will the Defender stand up to tough weather conditions, it’ll stand up to them for years thanks to its pressure-treated timber. Injected with chemical preservatives to keep the timber stronger for longer.

Wide Double Doors

Keeping bulky and big objects protected is simple with the wide-opening double doors of the Defender Apex. Their wide-opening format makes it easy to bring wide objects and equipment in and out.

Frequently Asked Questions


The BillyOh guarantee covers this building against:

  • rot
  • decay
  • insect infestation

Please note: The guarantee does not cover timber splits or warping which may occur naturally over time.

Duration of Guarantee:

  • Tongue and Groove Buildings - up to 10 years
  • Log Cabins - up to 10 years
  • Pressure Treatment Buildings - up to 15 years

For more information about BillyOh Guarantee, please visit our terms and conditions

If the building is shorter than 2.5m tall you should not require planning permission, (unless it’s more than 50% of your garden or to be put in your front garden). Planning permission rules can vary by area so we would strongly recommend checking your local council rules before ordering from us.
We'd recommend any flat and level base be put in place before you start construction of any of our buildings. The material can vary so long as it creates a flat and level base, many cutomers opt for Concrete, Paving Slabs or our popular Ecobase and EzeBase options available above. The floor of the building comes with bearers which lift the building off the base and allows the flooring to have a gap between itself and the ground this helps slow down or stop any rotting that could occur if the wood is kept in standing water.
The building should be treated once fully assembled and within one month of recieveing the product. All the treatments we supply ensure the building will only need to be treated once a year, but always consult the directions on the treatment that you have purchased. Pressure treated building dont need to be treated annually but may need to be topped up in its later life.
This building is designed & made of preassembled panels, that make assembly super simple. With a team of just 2 people and a bit of DIY knowledge you can expect to have your BillyOh building up within a day, with many smaller buildings easy to assemble in as little as 3-4 hours.
Our buildings are designed to be built on a flat, solid, level base. Many customers opt for a concrete or paving slab base, but for an easy cost effective base option, look no further than our popular Eze Base or Ecobase options for a simple, low cost bases
We currently offer a 10 year guarantee on all of our buildings.
We offer a pay by finance option on any purchase over the value of £560. Read more about our Pay by Finance option here.
Sheds are delivered in handy preassembled panels, which can be easily fixed together to create your shed.
Our sheds and summerhouses have cavities in the walls between the framing that will fit many common insulation materials inside. Although we do not recommend insulating your building as it has not been tested on our buildings, and would void your manufacturers warranty. More information can be found in our terms and conditions.
For all buildings it is recomended that 2 people build together.
Our buildings have been designed to be built with common DIY tools, such as a Drill, Screwdriver, Saw and a Hammer being the key tools needed to assemble. A Ladder comes in handy for taller buildings and a Spirit Level and Tape Measure are good ways to make sure your building is level and neatly built. Many of these tools can be found in the Value Assembly Kit sold above as a quick simple way to get the tools you need.
Your order can be tracked through the account section on our website or by contacting us directly. You will be contacted after your order by our helpful care team to arrange delivery of your building.
Yes! All our products come with a digital instruction booklet, which will be emailed to you to read through before your order is delivered! Instructions can also be downloaded from your online login.

We offer a pay by finance option on any purchase over the value of £560.

Our simple finance options allow you to spread the cost of your purchase over 24, 36 or 48 months.Read more about our Pay by Finance option here.

More About the Defender Apex Wooden Shed...

Toughness meets versatility in the form of a resilient storage solution in the Defender. Designed to weather any environment, this shed is constructed with an exterior shell of robust 15mm tongue and groove cladding, reinforced by a heavy-duty timber frame, making it impervious to even the most challenging weather conditions.

Long-Lasting Shed

The Defender stands the test of time with pressure-treated wood, providing exceptional longevity. Its modular design offers customization options for layout, ensuring a bespoke storage solution tailored to your specific needs. Topped with a classic apex roof, the shed not only exudes timeless elegance but also ensures balanced drainage for optimal performance.

Accessible and Functional

With an extremely accessible double-door and an extra headroom boasting a 6’3” foot eaves height, the Defender combines functionality with convenience. The versatile modular design allows you to personalize the door and window positions, adapting the shed to suit your preferences.

Years of Protection

This UK-manufactured Defender comes with a 15-year protective guarantee, a testament to its durability against rot and decay. The heavy-duty frame, featuring a beam thickness of 27x44mm, supports the shed and allows for the installation of heavy shelving and hooks. The premium tongue and groove cladding, with a standard thickness of 15mm across all panels, ensures a robust exterior shell.

Pressure-Treated Timber

The shed is not only resilient to tough weather conditions but is designed to withstand them for years, thanks to its pressure-treated timber injected with chemical preservatives for enhanced strength. This means the wood will stay stronger for longer, giving you a shed that you can truly rely on.

Dimensions 4 x 4 4 x 6 8 x 4 4 x 8 12 x 4 8 x 6 4 x 10 8 x 8 16 x 4 10 x 8 12 x 6 8 x 10 12 x 8 20 x 4 16 x 6 12 x 10 16 x 8 20 x 6 20 x 8 16 x 10 20 x 10 24 x 10
Width 120cm 120cm 237cm 120cm 354cm 237cm 120cm 237cm 471cm 295cm 354cm 237cm 354cm 588cm 471cm 354cm 471cm 588cm 588cm 471cm 588cm 705cm
Depth 120cm 187cm 120cm 245cm 120cm 187cm 305cm 245cm 120cm 245cm 187cm 305cm 245cm 120cm 187cm 305cm 245cm 187cm 245cm 305cm 305cm 305cm
Eaves Height (Inc Floor) 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm 193cm
Eaves Height (Internal) 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm 188cm
Ridge Height (Internal) 216cm 229cm 216cm 237cm 216cm 229cm 249cm 237cm 216cm 237cm 229cm 249cm 237cm 216cm 229cm 249cm 237cm 229cm 237cm 249cm 249cm 249cm
Ridge Height (Inc Floor) 229cm 233cm 229cm 247cm 229cm 233cm 259cm 247cm 229cm 247cm 233cm 259cm 247cm 229cm 233cm 259cm 247cm 233cm 247cm 259cm 259cm 259cm
Door Opening Size (w x h) 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm 97cm x 164cm
Door Height 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm 164cm
Door Width 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm 48cm
Width (Internal) 112cm 112cm 229cm 112cm 346cm 229cm 112cm 229cm 463cm 287cm 346cm 229cm 346cm 580cm 463cm 346cm 463cm 580cm 580cm 463cm 580cm 697cm
Depth (Internal) 117cm 176cm 117cm 234cm 117cm 176cm 294cm 234cm 117cm 234cm 176cm 294cm 234cm 117cm 176cm 294cm 234cm 176cm 234cm 294cm 294cm 294cm
Cladding Sizes Available 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm
Please Note: This product has been designed as an affordable solution to most popular light domestic uses. All products supplied self assembly flat packed unless otherwise stated.

Videos & Guides

Our resource library offers step by step instructions, explanation videos and customer content to help you to plan, buy and build your garden building.


We do not offer an installation service on any of our buildings, as they are designed to be easy and simple to assemble. Using the digital assembly instructions included in your order confirmation and a team of at least 2 people, the handy pre-assembled panels mean you will have your BillyOh building up in no time!

See just how easy our buildings are to assemble in this video: