Vapor barrier or a waterproofer for basement floor?

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Posted by: from Toronto
10/26/2015 at 1:59:03 PM


I'm planning to put a laminated floor 15.2mm thickness for my basement. Those floors have a foam backer. I want to know if I still need to put a vapor barrier underneath or I can put a waterproofer paint like Behr preminum basement & masonry waterproofer?


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Jeannie from Floors Direct North in Newmarket
Date/Time10/26/2015 at 3:04:55 PM

Hi there,

We always recommend a moisture barrier for floors with pad attached as the pad doesn't protect/cover the joints so it could still be prone to moisture. I would think that the waterproof paint would do it or a thin cheaper moisture barrier pad.

Kind regards,


Floors Direct North

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Date/Time10/26/2015 at 3:13:13 PM

As long as your floor isn't cracked up too bad you should be alright with just the paint. But you should always route and caulk any cracks that are visible.

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Date/Time10/26/2015 at 3:26:37 PM

Never would I install laminate floor directly on a concrete floor..even with vapor barrier..our company always installs a sub floor...that laminate floor is designed to be installed on a Condon flat will find the basement floor needs to be level to install laminate.

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Peeranis from Peerani's Flooring in Mississauga
Date/Time10/26/2015 at 4:26:33 PM


We regularly use the 3mm Vapor barrier underpad even if the laminate is with backing. It gives it a good moisture barrier and provides sound reduction as well.

Don't really think you need the waterproofer.


Peerani's Flooring.

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Brian from Next Restoration in Rockwood
Date/Time10/26/2015 at 7:17:03 PM

Basements are prone to flooding at sometime I always use the half bubble underlay its rigid prevents moisture from the flooring and acts as some what of an insulator as well, best way to go forget the foam back flooring.

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Darrell from Fextile in Toronto
Date/Time10/26/2015 at 8:37:29 PM

Yes. You still have to put the vapor barrier down. It is designed to allow your floor to move. The paint will not allow this. Also ment to keep condensation from ruining the laminate. The paint is waterproof however condensation from temperature fluctuations in the concrete will accumulate on the surface causing the laminate to bubble and swell. I hope this was helpful.

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Date/Time10/28/2015 at 5:38:31 PM

Good Afternoon;

You would be highly recommended to put a vapour barrier underneath at the very least. A subfloor is not too bad of an idea as well. It is however an added cost. You should also make sure the floor is level. I would also recommend the "bubbly" or "little pieces of Styrofoam" underlay. It is a little softer and will protect the floor and it is only about $50.00 per roll. I hope the information provided helps!

Kindest Regards,

Don Engler

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