We are in the process of having an extension built and today a load of materials were delivered. Amongst these materials are some chipboard flooring panels. Our previous house had these panels and it was a nightmare if ever it was necessary to take any up. Under the flooring will be a mass of piping and electrics re the heating system.Am I correct in my instinct to tell the builder that to use such materials is unacceptable and to request him to use traditional softwood floorboards?