15′ x 10′ Forest Timberdale 25yr Guarantee Tongue & Groove Pressure Treated Windowless Double Door Reverse Apex Shed (4.53m x 3.21m)
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 15′ x 10′ reverse apex shed combines spacious storage with exceptional security and workshop functionality. It’s constructed from top-quality materials and backed by a market-leading 25-year guarantee, making it an investment-grade garden shed suitable for demanding applications.
Key Features
- Premium modular construction for flexible assembly and door placement
- Pressure-treated timber requiring no further maintenance
- FSC-certified timber from sustainable, well-managed forests
- Windowless design for enhanced security
- Solid ledged and braced double doors with rim lock latch
- Exterior turn buttons and interior bolts for tool protection
- White Glove Delivery Service with optional professional installation
- 30% more timber than standard sheds for superior strength
Roof Type
This reverse apex roof design is particularly suited to workshop use, providing a high roofline that delivers exceptional headroom and increases storage options. The roof features a high-grade polypropylene-backed felt cover for unbeatable weatherproof protection, finished with two diamond-shaped finials that enhance the shed’s attractive appearance.
Dimensions
External dimensions: 4.53m (length) x 3.21m (width) / 15′ x 10′ (feet)
The generous 15 x 10 size makes this garden storage solution ideal for both residential and commercial applications, providing ample space for tools, equipment, or workshop activities.
Construction
This pressure treated shed is built from premium 12mm tongue and groove boards, renowned for their strength, style and weathertight qualities. The robust 28mm x 56mm internal framing uses 30% more timber than standard sheds, ensuring far superior strength and durability compared to competitors.
The complete modular design features interchangeable panels delivered in smaller sections, making assembly more straightforward. The floor is constructed from solid 12mm tongue and groove with pressure-treated bearers that provide extra support and act as an effective barrier against ground moisture. This robust construction ensures the floor easily copes with regular footfall.
Treatment & Guarantee
The timber is ethically sourced and FSC-certified, ensuring it comes from sustainable, well-managed forests. It is pressure treated and supplied with Forest’s market-leading 25-year anti-rot guarantee. This comprehensive guarantee means no further treatment is required, saving significant time and money over the building’s lifetime.
Doors & Windows
The ledged and braced double doors offer practical storage-friendly access and are fitted with exterior turn buttons, interior bolts and a quality rim lock door latch to keep valuable tools secure. The modular design allows you to decide where to place the doors, tailoring the shed perfectly to your requirements. The windowless design provides an additional layer of security while the high roofline maximises headroom.
Assembly Information
Instructions are included for straightforward assembly. The modular design with interchangeable panels makes the assembly process significantly easier than traditional shed construction. Professional installation is available as an optional chargeable extra if preferred.
Delivery Information
Forest’s White Glove Delivery Service provides free delivery to most UK addresses, with the shed delivered directly into your garden and all packaging removed. This premium service removes the hassle of collection and disposal. Installation by professionals is also available as an optional service.
Optional Upgrades
Wooden Shed Base Kit: A faster, more cost-effective DIY solution featuring UC4 incised pressure-treated timber with a 15-year rot guarantee. Size: 7.5cm (h) x 300.6cm (w) x 442.5cm (d)
Plastic Shed Base Kit: Quick and simple to install with an interlocking design. Made from 100% recycled plastic and reusable if the shed is repositioned. Contains 54 squares (500 x 500 x 40mm each) with heavy-duty weed membrane. We recommend using 15kg of 10mm pea gravel per square.
Frequently Asked Questions
Is this suitable for workshop use? Yes, the reverse apex roof and large 15′ x 10′ dimensions make this ideal as a mini garden workshop, offering excellent headroom and storage capacity.
Can I position the doors differently? Yes, the modular design allows you to decide where to place the double doors, tailoring the shed to your specific requirements.
How long is the guarantee? Forest provides a market-leading 25-year anti-rot guarantee with this pressure-treated timber shed.
Do I need to treat the wood? No, the pressure-treated timber requires no further maintenance or treatment throughout its lifespan.



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