plasticpigeon
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- Birmingham
I was listening to Radio 4 the other day, and I think a minister (I wasn't listening very carefully) started talking about how a lot of London housing stock is Georgian or Victorian they are a nightmare for the environment because of their solid walls and sash windows and he intended to address that issue. Does anyone know if this is an official scheme???
Has any proper analysis of this been carried out? For example, A plastic window takes energy and chemicals to make, the double glazing might last 20 years and the frame is hard to recycle. Wood needs to painted so that is an environmental hazard. The heat transfer coefficient is known for single vs double glazing so on balance which is better, i.e. energy saved due to reduced heat loss vs more frequent replacement and energy used in making plastic frames.
Same with solid walls. If battens are put up and insulation put on the inside of a building which is then boarded and plastered, that is a lot of material and initial embedded energy outlay. Also if additions make the fabric of a building deteriorate then that has to be taken into account. I bet there has not been any proper analysis done, just this vague idea that old windows and walls let more heat escape than new ones without looking at the big picture. It is like the electric car. What a load of rubbish. It only becomes a viable option if the electricity is made in a renewable way. People forget that power stations are inefficient and burn mainly gas, oil or coal. There is inefficiency in transmission, then inefficiency in charging a battery, inefficiency in an electric motor, not to mention the environmental effect of making and disposing at the end of life of huge battery packs. It seems that the fact that there are no tailpipe emissions convinces people that they are fantastic. Obviously it just transfers the air pollution out of cities to elsewhere. I have just looked up the percentage of renewable electricity produced in this country, and if I have interpreted correctly it is around 7% of total generation.
https://restats.decc.gov.uk/cms/electricity-growth/
Are ministers really so ill informed or are they just trying to get people to spend money???
Has any proper analysis of this been carried out? For example, A plastic window takes energy and chemicals to make, the double glazing might last 20 years and the frame is hard to recycle. Wood needs to painted so that is an environmental hazard. The heat transfer coefficient is known for single vs double glazing so on balance which is better, i.e. energy saved due to reduced heat loss vs more frequent replacement and energy used in making plastic frames.
Same with solid walls. If battens are put up and insulation put on the inside of a building which is then boarded and plastered, that is a lot of material and initial embedded energy outlay. Also if additions make the fabric of a building deteriorate then that has to be taken into account. I bet there has not been any proper analysis done, just this vague idea that old windows and walls let more heat escape than new ones without looking at the big picture. It is like the electric car. What a load of rubbish. It only becomes a viable option if the electricity is made in a renewable way. People forget that power stations are inefficient and burn mainly gas, oil or coal. There is inefficiency in transmission, then inefficiency in charging a battery, inefficiency in an electric motor, not to mention the environmental effect of making and disposing at the end of life of huge battery packs. It seems that the fact that there are no tailpipe emissions convinces people that they are fantastic. Obviously it just transfers the air pollution out of cities to elsewhere. I have just looked up the percentage of renewable electricity produced in this country, and if I have interpreted correctly it is around 7% of total generation.
https://restats.decc.gov.uk/cms/electricity-growth/
Are ministers really so ill informed or are they just trying to get people to spend money???