Best underlay for vinyl flooring in the bathroom

Do I need a special underlay for vinyl flooring in a bathroom? I’m planning to fit vinyl floor in my bathroom and want to make sure I do it right.

Asked by Pete on 15th Jan 2026
Expert Trade Answers
"No you do not need a separate underlay for vinyl flooring in a bathroom."
Answered on 15th Jan 2026 - Member since Oct 2025 - report
"No you don’t put underlay under vinyl flooring, just beed a good flat,smooth surface to lay it on. If not would need it either ply first or a sled Level compound to get a nice neat finish."
Answered on 15th Jan 2026 - Member since Jul 2025 - report
"If you want a moisture barrier, you can get 1mm think underlay. If you buy Vinyl that has integrated underlay this can also be used for that as an addition if you choose to. Vinyl products are fairly waterproof."
Answered on 15th Jan 2026 - Member since Dec 2025 - report
"Depending on the vinyl flooring. No underlay is required if your fitting cushion back vinyl. If your fitting Vinyl planks on a clock system the underlay may come attached to the back of the product."
Answered on 15th Jan 2026 - Member since Jan 2026 - report
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