The Mrs wants some laminate flooring down in the newly finished kitchen / dining room. It is an extension and as such the floor isn't completely level (slopes slightly) and has a couple of different floor finishes at present. OSB boards and floor boards. Some of the OSB boards are slightly proud of its neighbour so rather than throwing down the underlay and then the laminate I thought I would board it first to try and help with the unevenness.
I'm looking for some guidance if anyone can help: I'm not sure of the difference between hardboard and plywood (apart from how it is manufactured thanks to Google). I reckon hardboard is more flexible than plywood. So should I be going with plywood? I don't want to raise the floor by too much so was thinking 4mm or there abouts. Is that enough?
Thanks.