Overview

The National Non-Food Crops Centre (NNFCC) built this house in 2009 with support from the Department of Energy and Climate Change (DECC).

The Renewable House will be refurbished by the Centre for the Built Environment (CBE). They are creating a group of existing and new partners to retrofit/extend the house. The aim is to demonstrate the full potential of renewable material. The house will also be used to pilot new materials.

Design

The Renewable House demonstrates that whole life sustainability is practical and affordable for modern housing.

Built in 2009, the house is built with renewable, low carbon materials, including wood, wool and hemp. Not only is the house Code 4, but the design of the house has also significantly reduced the embodied carbon in the materials used.

 

Materials & Technologies

  • Hemcrete, a mix of hemp and lime, was used in the timber frame walls
  • The timber and Hemcrete structure, and FSC certified timber windows, deliver low U-values and good airtightness
  • ThermafleeceTM insulation made from British sheep’s wool also keeps the carbon footprint down, and renewable materials in the paint and furnishings provide a comfortable environment
  • A new bio-renewable carpet manufactured by DuPont is made from corn and sugar
  • Renewable materials in the paint and furnishings provide a comfortable environment
  • Careful attention to detail minimises cold bridging and maximises insulation
  • The timber and Hemcrete® structure, and FSC certified timber windows, delivers low U-values and good airtightness

 

Performance

Airtightness testing and U-value testing

Air Tightness Result
2.00 m3/(h.m2) at 50Pa
element value. U value W/m2K
Walls 0.19
Glazing 1.30
roof 0.16
floor 0.10