12′ x 8′ Forest Timberdale 25yr Guarantee Tongue & Groove Pressure Treated Windowless Double Door Reverse Apex Shed (3.64m x 2.61m)
Overview
The Forest Timberdale is a premium wooden shed expertly designed and built in Worcestershire by the UK’s leading manufacturer of garden buildings. This 12′ x 8′ reverse apex shed combines spacious storage with exceptional build quality, making it ideal for secure garden storage or as a high-end workshop. Backed by a market-leading 25-year anti-rot guarantee and constructed from FSC-certified timber, it represents the pinnacle of British shed craftsmanship.
Key Features
- 12mm tongue and groove construction throughout
- Exceptionally robust 28mm x 56mm internal framing (30% more timber than standard sheds)
- Pressure-treated timber with 25-year anti-rot guarantee
- Completely modular design for flexible door placement
- FSC-certified, sustainably sourced wood
- Windowless design for maximum security
- Double ledged and braced doors with rim lock latch
- White Glove Delivery Service included
Roof Type
The reverse apex roof design provides a high roofline, delivering excellent headroom and increased storage options. This makes the shed particularly suitable for use as a workshop or for storing tall items. The roof features premium 12mm tongue and groove boards topped with high-grade polypropylene-backed felt cover for superior weatherproof protection. Twin diamond-shaped finials add an attractive finishing touch to the design.
Dimensions
- Width: 12 feet (3.64 metres)
- Depth: 8 feet (2.61 metres)
- High roofline for exceptional headroom
Construction
This garden shed features top-quality modular construction using 12mm tongue and groove boards throughout. The solid timber construction is supported by exceptionally robust 28mm x 56mm internal framing, using approximately 30% more timber than standard sheds. This results in a far stronger building that stands up to regular use and the British climate.
The complete modular design means the shed arrives in smaller, interchangeable panels for easier assembly. This flexibility also allows you to decide where to position the double doors to perfectly suit your garden layout and requirements.
Treatment & Guarantee
The timber is pressure treated to provide complete protection against rot and decay without requiring any further maintenance. Forest backs this with a market-leading 25-year anti-rot guarantee, eliminating the need for regular treatment or retreatment over this period. The wood is FSC-certified, confirming it’s been ethically sourced from sustainable, well-managed forests.
Both the floor and roof are manufactured from premium 12mm tongue and groove. The pressure-treated bearers provide extra support to the floor and act as an effective barrier against ground moisture, ensuring longevity and durability.
Doors & Windows
The windowless design provides an additional layer of security, ideal for storing valuable tools and equipment. The double doors are ledged and braced (Z-frame construction) for maximum strength and durability. Security features include exterior turn buttons, interior bolts, and a high-quality rim lock door latch to keep contents secure.
Assembly Information
The modular design makes assembly straightforward, with clear instructions provided. Comprehensive assembly guidelines help ensure a smooth building process. For those preferring professional installation, Forest offers an optional chargeable installation service to take the effort out of setup.
Delivery Information
Forest’s White Glove Delivery Service includes free delivery to most UK addresses, with the shed delivered directly into your garden and all packaging removed. This premium service means you can start enjoying your new shed without the hassle of collection or packaging disposal.
Optional Upgrades
Two garden storage base options are available to prepare the ground:
- Wooden Shed Base Kit: A faster, cost-effective DIY solution made from UC4 pressure-treated timber with 15-year rot guarantee (7.5cm h x 241.6cm w x 354cm d)
- Plastic Shed Base Kit: Quick installation using 40 interlocking squares (500 x 500 x 40mm each) made from 100% recycled plastic, eco-friendly and reusable, with integrated drainage
Professional installation is also available as an optional extra to handle the complete setup for you.
Frequently Asked Questions
What makes the Timberdale different from other wooden sheds?
The Timberdale uses 30% more timber than standard sheds with robust 28mm x 56mm framing, combines 12mm tongue and groove construction throughout, and is backed by a 25-year guarantee. It’s handmade in Worcestershire using FSC-certified timber.
Is the shed suitable for a workshop?
Yes, the high roofline and spacious 12′ x 8′ dimensions make it ideal for use as a garden workshop, with excellent headroom and ample storage for tools and equipment.
Do I need to treat the wood?
No, the pressure-treated timber requires no further treatment or maintenance, and the 25-year anti-rot guarantee means you’re covered for decades.
Can I position the doors differently?
Yes, the modular design allows you to decide where to place the double doors to suit your garden layout and access requirements.



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