The floor would have look great and been more ... underlayment as a final layer that provides extra cushion and insulation. Rigid core flooring is 100 percent waterproof and would have easily ...

Two inches of rigid foam has an R value of only about ... the usual thing I see where people try to install batt insulation between the floor joists from underneath. Besides being a big pain ...

Mineral wool beneath ground floor floorboards. For concrete floors rigid foam insulation can be used. Trapped air between carpet threads, wool fibres and within foam reduces heat loss by conduction.