LIGHTWEIGHT AIRCRETE COMES TO THE AID OF GREEN ROOFS
Celcon
aircrete, already known for helping to cut carbon emissions because
of its excellent thermal insulation properties, is now being put to
another ‘green’ use. Waste aircrete which cannot be put back into
H+H UK’s manufacturing process is being crushed and used as part of
the base material for sedum roofs.
Green roofs, which permit the growth of flowers, grasses and sedum
plants, require a combination of organic matter and aggregates to
lie on the membrane, to act as a base for plant life to grow and to
protect the roof structure. Until recently crushed waste bricks were
used as the aggregate, but crushed Celcon aircrete has been found to
be better.
Chris Hallas, managing director of Shire Minerals says: “Aircrete
blocks are known for their light weight, so crushed aircrete is
ideal for use on green roofs because it is so light. This can reduce
the strength required in the construction to bear the roof and will
reduce costs.”
Architects and planners are being driven by planning constraints to
mitigate the environmental damage caused by the erection of new
buildings – and this is often the case even when building on
industrial waste land. A green roof can support a variety of plant
life as well as attracting bird life such as ringed plovers and
skylarks.
Apart from creating more natural green spaces in urban and
industrial areas, a green roof will provide other benefits such as:
Better-insulated buildings, so reducing the need for air
conditioning
Improved durability of the roof structure and lower maintenance
Enhanced air quality through increased greenery consumption of CO2
Less stormwater run off, so reducing drainage required
Commented Ian Exall, head of marketing for H+H UK: “This is yet a
further example of what a sustainable product aircrete is. Already,
pulverised fuel ash (PFA), a by product of coal-fired power
stations, accounts for nearly 80% of the raw materials we use. We
recycle a good proportion of any waste from the manufacturing
process and now we have found a productive use for other waste
product.
Email:
marketing@hhcelcon.co.uk
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