HPH045 : Why Are More People Not Retrofitting Their Homes?

Upgrading your property so that it is more comfortable and costs less to run makes sense. If we're serious about tackling climate change then retrofitting has to be undertaken on a huge scale. So if it looks good on paper, why are very few people doing it?

In this discussion (which was one of our Google+ Hangouts) we consider some of the barriers that may be putting people off.