On the BER rating it talks about insulating the floor of the house because it can lose up to 10% of heat
We are laying new floors soon, can we do anything to improve the insulation and improve the BER rating. The floors are concrete, pipes running underneath. HOuse built in 1994. All old floors and saddles are gone so we have a chance to do something now if it can be done
All underlays will have some insulating quality, some better than others, but nothing that will provide any significantly impact to the point of altering the BER. The floor coverings you choose will have as significant an impact, carpet will be much better than tile/stone for example.