20′ x 10′ Forest 4Life 25yr Guarantee Overlap Pressure Treated Windowless Double Door Reverse Apex Wooden Shed (5.96m x 3.21m)

Overview

This substantial 20×10 wooden shed from Forest represents the pinnacle of British garden storage design. Handcrafted in Great Britain using FSC-certified timber, this pressure treated wooden shed combines robust construction with an attractive reverse apex roof. The windowless design with double doors makes it ideal for secure storage of tools, equipment and garden machinery.

Key Features

• 25-year anti-rot guarantee – the longest on the market
• Pressure-treated wood requires no maintenance or retreating
• Fully modular design with 30% more framing for superior strength
• Handcrafted in Great Britain from FSC-certified timber
• 7mm overlap cladding with smart straight-cut finish
• Windowless design maximises security
• Hidden security hinges and padlock-ready hasp & staple plate
• Wide double doors for easy access to larger items

Roof Types

The shed features an attractive reverse apex roof design with smooth-planed barge boards and diamond-shaped finials. The roof is constructed from tough 8mm OSB and reinforced with a metal truss bracket. A green mineral-felt cover provides complete weatherproof protection.

Dimensions

This large garden shed measures 20′ x 10′ (5.96m x 3.21m), offering substantial storage capacity. The high roofline provides excellent headroom and allows you to store taller items such as ladders and garden equipment safely.

Construction

The 20×10 overlap shed boasts premium construction throughout. The walls are built from 7mm overlap cladding featuring straight-cut boards for a smarter appearance than standard overlap designs. The cladding allows natural timber movement whilst ensuring excellent rainwater runoff.

The floor is constructed from 12mm solid wood – considerably stronger than standard OSB flooring – and is supported by pressure-treated bearers for additional rot protection. This substantial base provides a durable foundation for storing heavy tools and equipment.

Treatment & Guarantee

All timber is pressure-treated as standard, offering an extraordinary 25-year anti-rot guarantee – the longest guarantee available on the market. This means the wood will never need retreating, saving you both time and money on maintenance. The pressure treatment ensures the shed remains protected from rot-causing ground moisture for decades.

Doors & Windows

Access to this secure storage shed is via wide double doors, which are ledged and braced for extra strength and to prevent dropping or movement. The doors feature hidden security hinges and include a padlock-ready hasp and staple plate for complete peace of mind. A padlock is not included but can be sourced separately.

The windowless design adds an important security layer by keeping expensive tools and equipment completely out of sight from passers-by.

Assembly Information

The fully modular design delivers the shed in smaller sections of interchangeable panels, making assembly significantly easier than traditional wooden sheds. The modular approach also provides market-leading flexibility for customising door placements to suit your exact requirements. A full set of fixings and clear instructions are supplied to assist with straightforward assembly.

If you prefer professional installation, we offer a competitively-priced installation service as an optional upgrade.

Delivery Information

Free delivery is available to most UK postcodes using Forest’s White Glove Delivery Service. Delivery personnel will position your new shed where you require it in the garden, with all packaging removed. Please note that you must prepare a suitable base before delivery – laying the shed directly onto grass is not suitable.

Optional Upgrades

To simplify the assembly process, we offer professional installation as an optional upgrade. A pressure-treated shed base is also available as an optional extra. Two base options are available:

• Wooden Shed Base Kit: UC4 incised pressure-treated timber framework with 15-year rot guarantee. Fast DIY solution measuring 7.5cm (h) x 300.6cm (w) x 590cm (d).
• Plastic Shed Base Kit: Made from 100% recycled plastic with interlocking design. Contains 91 squares (500 x 500 x 40mm each) plus heavy-duty weed membrane. Eco-friendly and reusable. Please note: plastic bases are not assembled by our installation service.

Frequently Asked Questions

Do I need to treat the wood? No. The pressure-treated timber requires no maintenance or retreating throughout the 25-year guarantee period.

Can I change the door position? Yes. The fully modular design with interchangeable panels offers market-leading flexibility for customising door placement.

Is a padlock included? The hasp and staple plate are included and are padlock-ready, but you’ll need to source a padlock separately.

What base do I need? You must prepare a suitable base before delivery – laying the shed directly on grass is not acceptable. Optional garden storage bases are available.

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