Sub floor in Basement

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Posted by: from Whitby
6/27/2011 at 1:36:37 PM

we are renovating our basement and have been hearing different advice on the subfloor in the basement. We are planning to put in laminate flooring. Is it better to put down a sub floor or am I just wasting my money. Is Dri Core the only solution for the subfloor or can a contractor construct one just as effecient.

Thanks, For taking the time to read this.

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Leonel from Archwood Construction in Ottawa
Date/Time6/27/2011 at 3:29:44 PM

Hello Marc,

There is an alternative to dry core. You can buy the membrane in a roll format and the 4x8 sheets of substrate, to whatever thickness you need (7/16, 5/8, 3/4) plywood or OSB. As long as the membrane is completely sealed and properly overlapped and sealed to prevent any moisture coming through, without compromising the permience.

I hope that this responds to your question.

Leonel Lima

Lima Home Renovation


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Date/Time6/29/2011 at 11:16:34 AM

Hi ,Stewart here of Sct floorcoverings.We specialise in Laminate floorings.It is not necessary to have a subfloor installed in a basement for the purpose of laminate flooring some people prefer to have subflooring for added comfort value. Their are 2 basic requirements for installing Laminate flooring on a Basement floor one is that their is no water leaking in from the outside through the foundation walls. the other is that a vapour barrier be laid over the basement concrete floor prior to installation of the laminate. i would highly recomend buying 15.3mm AC4 quality Laminate for this type of application.Any other questions or concerns please call me at 416-295-0906. Regards-Stewart-Sct Floorcoverings-Mississauga.

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Date/Time7/4/2011 at 6:15:41 PM

There are many items to consider when planning to install basement flooring. As perviously mentioned, the first consideration is to ensure that your basement is dry and free from leaks. If there is a water penetration issue, best to address this first. Secondly, consideration must be given to how level the floor is . Most basement floors have varying degree of uneveness. The next item to consider is whether you want a thermo break and added r value. This can be achieved with rigid floam and plywood tapconed into the concrete. I am not a supporter of laying plastic vapour barrier over concrete as all it does not provide for a thermo break and traps moisture that can not be removed. Alternative below grade sub floor underlayments such as Quiet Walk are in my opinion a superior alternative to plastic Vapour barrier.


KIngsway Construction Inc

Glenn Rosborough

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Srini in Milton
Date/Time9/7/2011 at 3:48:57 PM

We used Delta FL for basement, on top it under pad and then Laminate.

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