Has anyone any experience of thermal wall coverings, such as Wallrock? I'm interested to know how effective they are and about any problems with application. I already have cavity wall insulation and 10 inches of insulation in my loft. I live in a small, end terrace bungalow which is already fairly ecomonical to heat, but as energy prices are obviously set to rise annually, I wonder whether I should invest in another heat retaining layer. I would be grateful for any thoughts/ experiences.