Forest Garden Xtend 4.0+ Double Door & Two 1/2 Opening Windows

Forest Garden Xtend 4.0+ offers real energy efficiency with double-glazed windows, insulated walls, roof, and floor. Keep warm in winter and cool in summer while reducing energy costs. With an EPC energy rating of B, it's as efficient as a new-build home. Includes all fixtures, fittings, and instructions for easy setup.

For full technical specifications click here

STRUCTURAL INSULATED PANELS (SIPS)

• The core structure of an Xtend building is made from SIPs panels - high-performance material for building construction. The 21st-century way to build
• 9 7mm thick insulated walls consist of 75mm of polystyrene insulation sandwiched by two sheets of oriented strand board (OSB)
• Gives structure and insulation in one pre-assembled and cut-to-size panel
• Total wall thickness including SIPS panels, internal and external cladding and cavities is 177mm
• Roof is 11mm OSB + 100mm insulation + 11mm OSB = 122mm total

External Cladding 

• Pre-cut external timber cladding panels for quick and easy assembly
• No measuring and cutting every single batten and board to size before mounting
• Cladding panels are simply positioned on the building and screwed into place
• Panels are made with 15mm thick premium interlocking tongue and groove boards mounted to framing battens
• Comes untreated and we recommend the application of any of the following:
  
  • Sikkens Cetol HLS Plus
  • Restol Wood Oil
  • Timmersol ETS Double Protectant
  • Osmo Country Colour
  • Osmo Natural Oil Woodstain

Internal Cladding

• Pre-cut interior MDF panels for quick and easy assembly of walls and ceiling
• No measuring and cutting of every panel
• Wall panels are mounted to 28mm thick battens creating a cavity perfect for routing electrical wiring
• Roof battens are 45mm thick to allow for recess roof lights
• Comes with primer applied – can be painted in a colour of your choice using standard interior emulsion paint
• The panel design has a vertical beaded profile
• The floor is left unfinished for you to add your own choice of covering

Roof Covering 

• External roof covering is made from 1.2mm thick EPDM black rubber
• It creates a maintenance-free waterproof membrane
• Does not crack, split or rot
• Does not support moss or algae growth
• UV stable & environmentally friendly
• Safe and easy to install – the system is laid with cold-applied adhesives (supplied)
• One piece sheet means no joints and no leaks
• 50 years roof life expectancy
• Anthracite grey fascias include

Windows & Doors

• Window material:  uPVC 5 chamber
• Window colour: Anthracite grey externally with grained finish Smooth white internally Window locking: Two double clasp, mushroom-headed espagnolettes
• Door material: uPVC  reinforced 5-chamber
• Door colour: Anthracite grey externally with grained finish Smooth white internally
• Door locking: 7-point multi-lock with ultion three-star security barrel
• Glazing 28mm, A-rated, double-glazed, safety glass

Energy Efficiency

• Highly efficient insulated walls roof and floor
• Double glazed windows
• Warm in Winter, cool in Summer
• Energy efficiency model rating of 78 (category C)*
• Potential to increase to 82 (category B) with the addition of a photovoltaic solar panel

*based on lighting from 3 x 4 watt LED bulbs and heat from a high efficiency wall-mounted heat pump