Floor Upgrade - any advantage in this?

I am going to upgrade my 20mm chipboard floor with another layer of either 20mm chipboard or 20mm MDF. Just wondering wether sandwiching some 5mm rubber carpet underlay in between the layers will help vibrations and flanking at all? Thanks JG

JohnGardner wrote:

I am going to upgrade my 20mm chipboard floor with another layer of either 20mm chipboard or 20mm MDF. Just wondering wether sandwiching some 5mm rubber carpet underlay in between the layers will help vibrations and flanking at all? Thanks JG

regarding an extra 20mm of chipboard, It kinda depends on what you have underneath really. if you mean foam rubber rather than solid rubber......No 5mm rubber carpet underlay won't help at all, save to slightly damp some footfall or other impact noise. Solid 5mm rubber won't do anything as at that shape factor, it can't deform. Paul

Nothing underneath, just bearers/joists, one foot of air and the ground. Its easy to hear footsteps in the room, outside the room, especially my two year old daughter running around. Imagine my snare at 3.00am!! No headroom for a floating floor so adding mass is the only option. I'm thinking one two layers of 20mm chipboard or MDF should do the trick I hope. JG