Create a comfortable, energy-efficient workspace or relaxation area with the Forest Garden Xtend Insulated Garden Room. Designed using advanced Structural Insulated Panel (SIP) construction, this premium garden building offers outstanding thermal performance, modern styling and exceptional durability, making it ideal for year-round use.
With a generous 12.25m² footprint, double glazing, highly insulated walls, roof and floor, and a 15-year structural guarantee, the Xtend Garden Room provides a practical and cost-effective alternative to a traditional home extension.
The Ideal Garden Office or Outdoor Living Space
Whether you need a dedicated workspace, studio or additional room away from the main house, the Xtend Garden Room offers exceptional versatility.
Perfect for:
- Home offices
- Remote working
- Garden studios
- Hobby rooms
- Home gyms
- Creative spaces
- Consulting rooms
- Garden retreats
Creating valuable extra living space without extending your home.
Advanced SIP Construction
The building is constructed using Structural Insulated Panels (SIPs), one of the most energy-efficient modern building methods available.
Benefits include:
- Superior insulation
- Faster construction
- Exceptional structural strength
- Improved energy efficiency
- Reduced heat loss
The same technology used in many modern energy-efficient homes.
Excellent Energy Efficiency
The Xtend Garden Room achieves an EPC energy rating of C and can potentially be upgraded to EPC B with the addition of a solar panel system.
Advantages include:
- Lower energy consumption
- Reduced running costs
- Improved comfort
- Sustainable performance
- Year-round usability
Helping create a comfortable working and living environment.
Warm in Winter, Cool in Summer
The highly insulated structure helps regulate internal temperatures throughout the year.
Features include:
- Excellent thermal performance
- Comfortable year-round use
- Reduced temperature fluctuations
- Lower heating requirements
- Improved energy efficiency
Making the building suitable for daily use in all seasons.
Highly Insulated Wall Construction
The walls are engineered for outstanding thermal efficiency.
Wall specification:
- 97mm wall thickness
- 75mm polystyrene insulation core
- Dual OSB structural boards
- High-performance thermal barrier
Providing excellent insulation and structural integrity.
Advanced Roof Insulation
The roof system is designed to minimise heat loss while delivering long-term weather protection.
Roof specification:
- 122mm roof thickness
- 100mm insulation core
- Dual 11mm OSB boards
- Enhanced thermal performance
Helping maintain a comfortable internal environment.
Energy-Efficient Double Glazing
The doors and windows feature premium A-rated double glazing throughout.
Benefits include:
- Reduced heat loss
- Improved insulation
- Enhanced comfort
- Better energy efficiency
- Increased security
Supporting lower energy costs and improved usability.
Premium uPVC Windows
The modern windows combine security, durability and performance.
Features include:
- 5-chamber uPVC frames
- Anthracite grey exterior finish
- White grained interior finish
- A-rated glazing
- Secure locking systems
Adding both style and functionality.
High-Security Double Doors
The double doors provide secure and convenient access to the building.
Security features include:
- Reinforced uPVC construction
- 7-point multi-locking system
- Ultion three-star security cylinder
- A-rated double glazing
- Enhanced protection
Providing peace of mind for valuable equipment and belongings.
Contemporary Exterior Design
The modern appearance makes the Xtend Garden Room a stylish addition to any garden.
Design highlights include:
- Contemporary architecture
- Anthracite grey detailing
- Clean modern lines
- Professional appearance
- Attractive finish
Suitable for both residential and business use.
Premium Timber Cladding
The external cladding consists of high-quality tongue and groove timber panels.
Benefits include:
- Traditional timber appearance
- Durable construction
- Easy installation
- Attractive finish
- Customisable treatment options
Allowing you to personalise the appearance of your garden room.
Maintenance-Free EPDM Rubber Roof
The roof is covered with a premium one-piece EPDM rubber membrane.
Advantages include:
- Waterproof protection
- UV stability
- No cracking or splitting
- Moss-resistant surface
- Up to 50-year lifespan
Providing long-term reliability and peace of mind.
Ready for Electrical Installation
The internal wall construction includes dedicated cavities designed for routing electrical wiring.
Features include:
- Convenient cable routing
- Easier electrical installation
- Professional finish
- Flexible interior design
- Future-proof functionality
Ideal for modern home office setups.
Customisable Interior Finish
The interior MDF panels are supplied pre-primed and ready for painting.
Benefits include:
- Easy decorating
- Personalised colour schemes
- Professional appearance
- Smooth finish
- Interior flexibility
Allowing you to create a space that matches your style.
Built for Long-Term Performance
Every component has been selected to deliver lasting quality and reliability.
Features include:
- SIP structural system
- High-quality glazing
- Durable cladding
- EPDM roofing
- 15-year structural guarantee
Providing confidence in your investment.
Key Features
- Installed insulated garden room
- Spacious 4m x 3m design
- Structural Insulated Panel (SIP) construction
- EPC energy rating C
- Potential EPC B with solar panel installation
- 97mm insulated wall construction
- 122mm insulated roof construction
- A-rated double glazing throughout
- High-security double doors
- Anthracite grey uPVC windows and doors
- Maintenance-free EPDM rubber roof
- Pre-primed internal wall panels
- Electrical cable routing cavity
- Contemporary modern styling
- 15-year structural guarantee
Please Note External timber cladding comes untreated and will need to be treated using one of the following recommended treatment products
- Sikkens Cetol HLS Plus
- Restol Wood Oil
- Timmersol ETS Double Protectant
- Osmo Country Colour
- Osmo Natural Oil Woodstain
Specifications
| Installation Included |
Yes |
| Interior Maximum Height |
206 cm |
| Roof Material |
EPDM Rubber |
| Pre-treated Wood |
No |
| Double Glazing |
Yes |
| Double Doors |
Yes |
| Brand |
Forest Garden |
| Type |
SIP Garden Building |
| Dimensions |
H 250 x W 405 x D 342 cm |
Delivery & Availability
- Estimated delivery: 15 working days
- Availability: lowStock
Brand new from Marqet. UK delivery and 30-day returns.
For product questions or order support, contact admin@marqet.co.uk.
