What thickness underlay for engineered wood flooring

I'm planning out a lounge renovation, but one thing is tripping me up and I'm getting lots of mixed answers. Just need to know what type and thickness of underlay to use for engineered wood flooring. And what kind of cost am I looking at?

Asked by Kelly on 20th Dec 2025
Expert Trade Answers
"“For engineered wood flooring we usually use a 2–3 mm underlay. Over concrete it needs a built-in moisture barrier; thicker 3–5 mm is only used if extra sound reduction is needed and the manufacturer allows it. Underlay typically costs £2–£10 per m², depending on the type.” and if you want to know the labour charges it depends on how much area is to work."
Answered on 20th Dec 2025 - Member since Dec 2025 - report
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