I am about to lay a cushioned vinyl floor in our bathroom. I know that I need to lay a hardboard sub-floor first and the floorboards would show through. I have looked on various websites and am receiving conflicting information about whether they should be laid rough or smooth side up?
Could I have your expert opinions? If anyone can justify, it would be very helpful.
TIA
Paul
As far as I know it doesn't matter of no adhesive is involved. But if you are going to stick the edges down then lay the hardboard rough side up. For laying instructions:
See page 2. It recommends plywood in bathrooms under vinyl tiles but you should be fine with hardboard under sheet vinyl.
In article , Paul Douglas writes
I'd lay it rough side up, nailed at 8" centres. The reason for rough side up is to discourage the vinyl (or carpet) from slipping around. Nailing stops the hardboard sliding around or slapping when walked over, tape the seams with 2" duct tape too. You are also meant to acclimatise the boards to the room for a week before hand but I'd give it a light water spray on the rough side & make it a day
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