CobBauge sample #1

Composite structural/thermal cob.

Composite structural/thermal cob.

Planning a visit?
You will find this material in: Cabinet G

Geographic availability
Origin / Location of manufacturing / Processing plant
Devon, UK
Application and typical uses of the product

Domestic dwellings/commercial buildings.

Breakdown of Product

Structural component (50% by volume): Clay based subsoil from Devon, UK (UK3) with 2.5% (by weight of dry soil) of added chopped reed.

Thermal component (50% by volume): Clay based subsoil slip from Devon, UK
(UK4) with 50% (by weight of dry soil) of added hemp shiv.

Embodied energy (Processing plant emissions). How much energy is used to produce the product? kWh per annum or kgCO2
Data not supplied.
% Recycled Content
Thermal conductivity (k) W/m°C or Thermal transmittance (U-value) - W/m2°C (If applicable)
Target thermal conductivity of < 0.3 W/(mK)
Is the resource Renewable or Finite?
Does the material need to be processed further or treated by the user
Structural cob component: Addition of fibre material. Thermal cob component (light earth): Addition of fibre material to a clay rich ‘slip’.
Buildability - how complex is installation? What skill level is required?
Not complex. Minimal skill following training.
Deconstruction and Re-use

Fully reusable or returned to natural state.

Disposal/ End of Life

Returned to natural state (on site subsoil). Fibre material biodegradable.

Types, textures, specifications and colours currently available
Dependent on original subsoil colour/texture.
Is this product certified?

Designed to comply with current UK and French building regulation on thermal conductivity.

Lifespan of materials if maintained correctly (years)

Decades to potentially several hundred years

Availability - how easy is it to source the material

Readily available in clay subsoil areas.

Supplier Name
CobBauge (Interreg VA research project), University of Plymouth, Faculty of Arts and Humanities, School of Art, Design and Architecture.
Main Contact
Matthew Fox, Kevin Owen
Contact Address
School of Art, Design and Architecture Faculty of Arts and Humanities, University of Plymouth, Drake Circus, Plymouth PL4 8AA UK