Which underlay should i use with real wood flooring?

Question

i have recently purchased some real wood flooring which i plan to lay myself the only thing is that it is going to be layed upon existing timber floor and the bathroom is below this room should i use a damp proof membrane underlay to stop any moisture getting under the floor and would fibre underlay boards be ok to use on top of the membrane before i lay the floor?

Answer 1

We recently did this in our bathroom too. We didn't use a waterproof thing though, we used this big foam board stuff. Its like thin really light foam board and it comes in big packs.