Later this year, the Government is launching a consultation document, to see how our country's historic period homes can be made more energy-efficient – but many home owners are starting to act now.
Pioneers like Michael are testing new methods of energy saving, and, like all pioneers, there have been some disasters along the way. "Rosewood has solid walls, so I couldn't put in cavity insulation," says Michael, a financial markets consultant. "But with small room sizes, I didn't want to lose any space with internal insulation."
Michael decided to render the exterior walls, adding an inch of lime-rich mortar. "The quantities of lime need to be exactly right, otherwise it just falls away from the wall – which it did, several times." The extra thickness now acts as a thermal barrier, keeping warmth in during the winter and heat out in summer.
The old floorboards, like those pictured above, were lifted and a layer of polystyrene and concrete laid beneath them – with added vents to make sure the old oak can still breathe. Michael also added a new type of breathable insulation to the roof slats, and installed wind-operated ventilation to help air circulate in the extra-sealed space.
With a pole-mounted wind turbine, solar panels and solar hot water, the house generates more energy than it uses. "My major expense was the wind turbine and solar panels," says Michael. "The insulation itself only cost about £2,000."
It is possible to retro-fit even further. In a pilot project in south east London, a 1930s terrace has been transformed into a super-efficient home, scoring an A on the energy performance certificate ratings – which even new homes struggle to achieve. Its heating requirements have plummeted by 80 per cent – from 223 kW/h per sq metre per year to just 32 kW/h per sq metre – thanks to new insulation for the cavity, internal and external walls, space-age insulating materials in the roof and
low-energy LED lighting.
The project is the brainchild of the Hyde Group, an affordable housing provider. It uses the latest eco technology, including the world's first breathable foil insulation under the rafters, new flat-roof insulation for the rear extension and low-energy LED lighting. Each LED bulb lasts 50,000 hours, compared to 10,000 hours for fluorescent bulbs and 3,000 hours for tungsten ones.
Another homeowner, Philippe Bassett, lifted his 1960s house in Esher from a G to a B/C rating on its Energy Performance Certificate, using a new technology called Bolix (www.studiocelandine.com) – polystyrene panels stuck onto his external walls, which are then rendered.
"There is a huge range of materials at home owners' disposal now," says Simon McWhirter, homes campaigner for World Wildlife Fund. "Sadly, builders are not yet familiar with many of them and stick with inefficient methods. But with new slimline wall insulation, people living in older, single-skinned homes really have the materials to be able to insulate them."
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