Consumers who want to insulate their homes should watch for high-pressure sales tactics, dodgy information and poor installations as some firms may be breaking the law, the Office of Fair Trading (OFT) says.
Energy deals promising savings and free energy often leave consumers out of pocket, despite what their ads claim, an investigation by consumer group Which? has found.
Households that switched to a cheap, fixed energy tariff before the big six suppliers hiked prices this winter will have saved serious cash, research shows.