> Requiring better insulation for new buildings is not really that much a thing where you need to raise taxes, because the cost of proper insulation is passed on to builders - and the end users pay that, but in turn they have lower heating/cooling costs.

I was referring to retrofit, sorry for not being clear.

Also, the costs are not passed on to customers. Very few houses in the history of the world have been priced according to what it cost to build. The market sets the price.

Carpets in bathrooms is a kind of baby boomer 1970/80s thing I think - plenty of it still about. Check the corners of the room where condensation pours down the wall into the carpet... after a few years you get a nice dark grey brown mould line.