Hi - I have a concrete floor conservatory (4mx4m) which I was going to cover with laminate (leaving expansion gap) ... and was going to use 6mm woodfibre underlay boards (- on top of a dpm)
- and I was wondering if it was a good idea to use 2 layers of woodfibre underlay to improve insulation... (lay top layer @ 90 degrees to bottom) or whether there would be too springy and damage the joints of the laminate? thanks Andy