Innovative products used on Nottingham University Code 4 house
The BASF Creative Energy House is one of six innovative energy-efficient homes built at the University of Nottingham. The house has a price-tag of £70,000, based on a build of 20 houses, making it affordable to first time buyers and key workers, and achieves a Level 4 rating on the Code for Sustainable Homes.
Derby-based architect Derek Trowell designed the house with a compact floor area, relying on passive solar design to keep costs down. The north, east and west walls are highly insulated, with the minimum windows compatible with acceptable day lighting. But the south-facing wall is a fully glazed two-layer adjustable sunspace with glazed screens that can be opened or closed to help heating or cooling.
A ground-air heat exchanger draws fresh-air through an underground network of pipes, and a rainwater collection system feeds the washing machine and cisterns.
BASH has deployed many of its own products and those of its supply chain partners. The ground floor has been built using insulating concrete formwork utilising BASF’s Neopor, expandable polystyrene that has high insulating properties.
The cores of the ICF blocks are filled with specialist concrete containing new BASF admixture Rheocell ICF. Used for the first time in the UK house-building project, this reduces the fine aggregate needed by up to 10%, lowering the environmental impact.
The first floor walls and roof have been constructed using structural insulated panels from SBS. The 150mm thick panels have a rigid polyurethane foam insulation core made using BASF Elastopor, achieiving a low heat loss U-Value of 0.17 – 0.19.
A Corus Colorcoat Urban with additional Neopor insulation provides a U Value of 0.15, compared to an average of 0.45, three times more. The lightweight steel roof incrporates a BASF coatings with pigments that have solar heat reflectant properties.
All south-facing rooms feature a plasterboard called Smartboard, which contains BASF’s Micronal, microscopically small plastic spheres with a wax core. When the temperature rises, the wax melts and the phase-change material absorbs heat. When the temperature drops, the wax solidifies, and heat is emitted.
The BASF House in Nottingham will be occupied by University staff or students with all aspects of power use and energy dissipation within the home will be monitored checking how the various energy efficient products perform.
BD Magazine - Housing - April 2008