Nature inspired healthy building materials
Pete Walker BRE Centre for Innovative Construction Materials
University of Bath
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ECO-SEE Eco-innovative, Safe and Energy
Efficient wall panels and materials for a healthier indoor environment
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ECO-SEE CONSORTIUM
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We spend 80-90% of our lives indoors
• Measures of indoor air pollutant levels are often higher than outdoor levels
• Indoor air pollutants have been ranked among the top five environmental risks to public health
• 30% percent of new and remodelled buildings worldwide may be the subject of excessive complaints related to indoor air quality
Studies have confirmed that airtight buildings with low air exchange rates lead to deterioration in indoor environmental quality for occupants
Indoor air quality
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Agricultural chemicals Industrial Pollutants
Traffic Fumes
Ground contaminants
Ozone
Dust and fine particles
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Moisture and humidity Volatile Organic Compounds (VOCs)
Particulate matters
Microbiological / mould growth
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Innovative products
• Bio-based insulation with enhanced capability • Novel coatings with improved environmental
regulation • Photo-catalytic coatings • Improved environmental modelling capability
• ECO-SEE wall panels
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ECO-SEE Materials: Insulation
Mineral wool
Hemp Thermal flax Hemp-lime (275 kg/m3)
Cellulose flakes Sheep’s wool
Wood fibre
Hemp-lime (300 kg/m3)
Benefits of moisture buffering
From Rode et al., 2005
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VOC Capture
relative humidity
mass water formaldehyde
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&Figure'24.'Installation'of'MgO'boards'
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&Figure'26.'CLAYTEC'earth'plaster'application'
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&Figure'27.'8<10mm'thickness'of'plaster'
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Some ECO-SEE project outcomes to date:
• 60% improvement in thermal resistance of clay plasters.
• 80% improvement in moisture buffering performance of clay plasters.
• Improved VOC capture of sheep’s wool insulation.
• Up to 50% reduction in energy performance of ECO-SEE test sites compared to reference.
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Thank You