Technical Information

Dimensions
 
Standard
  • Internal floor width 4.0m
  • Internal height 2.4m at highest point
  • Internal width 4.8m or 6.8m at widest point
  • External footprint width 4.4m
  • External width at widest point 5.4m
  • External overall height 3.2m
  • External height with floor at ground level (feet 0.5m below ground level) 2.7m

Wide

  • Internal floor width 6.0m
  • Internal height 2.4m at highest point
  • Internal width 6.8m at widest point
  • External footprint width 6.4m
  • External width at widest point 7.4m
  • External overall height 3.2m
  • External height with floor at ground level (feet 0.5m below ground level) 2.7m
Materials
  • Finnish spruce and birch plywood structure
  • Sheep’s wool insulation with polyester anti-slump, permanently treated with Borax
  • Breathable cloth and airtight, foil vapour control membranes
  • Triple glazed glass units
  • High-performance airtight windows
  • High-performance airtight exterior doors
  • Solid timber interior and exterior cladding
  • Water-borne acrylic paints and lacquers
  • Solvent-free adhesives
  • Lime exterior render
  • Water and root proof roofing membrane

Tech specs

 

Current UK regulations 2010

Future UK regulations 2016

Passivhaus requirements

Standard building

Green Unit

Floor insulation

0.25W/m²K

TBD

0.15W/m²K

0.22W/m²K

0.15W/m²K

Wall insulation

0.35W/m²K

TBD

0.15W/m²K

0.3W/m²K

0.15W/m²K

Ceiling insulation

0.25W/m²K

TBD

0.12W/m²K

0.24W/m²K

0.12W/m²K

Airtightness

10m³/hr/m²

3m³/hr/m²

0.6m³/hr/m²

10+ m³/hr/m²

0.6m³/hr/m²

Air changes per hour

10ach

3ach

0.6ach

7ach

variable to 10ach

Air quality

Medium

Medium

High, filtered

Medium

High, filtered

Air moisture content

30% – 60%

30% – 60%

35% – 55%

Below 40%

45% – 50%

Comfort temperature

Not specified

Not specified

17⁰ – 20⁰

22⁰

17 – 19⁰

Annual energy use per annum

Not specified

39 – 46 kWh/m²

15kWh/m²

200 kWh/m²

15kWh/m²

Embodied energy

Not measured

44% – 60% reduction

Minimum possible

129 – 239 kW/m²

81 kW/m²

Recyclability

No requirement

No requirement

Encouraged

Low recyclability

Fully recyclable

Testing procedure

SAP

SAP

Physical test

SAP

Physical test