Lenny Antonelli is deputy editor of Passive House Plus. He also writes regularly for the Irish Times, and has contributed to a variety of other publications including the Sunday Times, the CS Monitor, Village, the Sunday Tribune amd the Dubliner. He is currently working on a radio documentary on Ireland's oceans.


Much of the housing built around Dublin over the last forty years has been built of single-leaf nine-inch hollow block construction – which are both notoriously energy inefficient and extremely difficult to insulate effectively without causing damp problems. Lenny Antonelli visited a hollow block house which has been ecologically renovated to protect occupant health whilst shooting to the top of the energy rating scale.

While it is one of the most ecological building materials around, rammed earth - a mixture of earth, sand, gravel and clay - is usually associated with buildings with an earthy, less-than-modern aesthetic. A new house in Vorarlberg, Austria, could change that.

According to Building.co.uk, the three leading international tools for assessing the environmental impact of buildings will soon be combined to create a common international standard.
The best examples of sustainable planning and building in Northern Ireland were honoured in a joint awards ceremony held last month by the Royal Town Planning Institute and the Royal Society for the Protection of Birds. The RTPI described the winning projects as follows:
Following the annoucement that the government is commiting 100 million euro this year to domestic energy refurb, the UK's climate change secretary Ed Miliband has announced that all British households will be retrofitted by 2030.