We're looking at buying a house where the owner just renovated (bought it to do up and sell so did on the cheap) and put underfloor heating in the large open-plan kitchen-diner-living area. apparently it's electric, and it's not clear whether he insulated underneath it but I suspect not. Flooring above it is laminate. are there likely to be issues with this? are we going to end up with sky high electric bills? no experience of underfloor at all so I am not too sure what to expect.