Laminate underlay on upstairs concrete floor

17 Jan 2008
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United Kingdom

I have a 2 floor flat built in 1970's on 3rd and 4th floor. Each level has a concrete floor.

I am about to replace carpet in the upstairs bedroom with laminate floor and wondered if I need to use a membrane, or whether I can just use fibreboards alone since this is not on the ground floor, or new concrete?

thanks for your help

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No one has replied to you yet, and I guess you have dampness on your mind......
All I can say is, when you lift the carpet if there's no musty smell, I'd bash right on without using any membrane.
John :)
Thanks, John. Yes, dampness seems to be the reason quoted for advising the use of the membrane. That advice never seems to be adjusted depending on which floor you are dealing with.

I have bought the fibreboards now from Wickes so if there is any dampness I'll have to switch to plan B. The underlay with built-in membran that was available in Wickes was 3mm thick, as opposed to 5mm of the boards. The advice from Wickes was - you can use a membrane, but you don't have to. So I went for the fibreboards.

thanks again

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