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Timber2005-02-28 Britain imports 85% of its timber, primarily from a top 10 list of countries, all of whom have established regulated forest management programmes. Britain is aiming to increase its own forest cover from 10% to 15% of the land surface. Timber has one of the lowest embodied energy values of any material. Timber is naturally low in thermal conductivity, and an excellent insulator. It is 15 times better as an insulator than concrete, 400 times better than steel and 1770 times better than aluminium. A 2.5cm timber board has better thermal resistance than an 11.4cm brick wall. If all homes built in Britain since 1945 had been constructed to modern timber-frame standards, there would have been a reduction of more than 300 million tonnes of CO2 emissions. |