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Laminate Flooring Underlayment


Underlayment is a vital addition to your laminate floor installation and serves many functions. Underlayment adds a level of comfort to laminate floors, provides soundproofing qualities, helps to protect the flooring from moisture, and helps to even out minor imperfections of the subfloor to ensure that your laminate flooring is installed on a perfectly level surface.

Here are some of the major types of underlayment you can expect to find most commonly associated with laminate and other types of wood flooring. Each has different characteristics and will add a specific benefit to your flooring project:

Standard Foam Underlayment

This is the most common type of laminate flooring underlayment available. It is a thin, foam padding usually measuring 1/8 inch thick, and is available in different roll sizes.

Since it is made without a built-in moisture barrier, this type of underlayment for laminate flooring is made for use in areas where minimal moisture is expected. However, it can be used in conjunction with a plastic sheet if moisture is expected in any capacity. Foam underlayment provides a minimal level of sound reduction and therefore should only be considered as entry-level for use with laminate flooring.

Combination Underlayment

Combination underlayment is essentially the same as a standard foam underlayment for laminate flooring, but comes with a moisture barrier attached. This feature prevents moisture from seeping into your laminate from underneath, so it can be installed in areas where higher levels of moisture are expected, such as basements. Its thickness is the same as a standard foam underlayment and sold in various-size rolls.

Acoustical/Sound Dampening Underlayment

This type of laminate flooring underlayment is used to reduce the hollow sound that is often created when walking on a laminate floor. It is available in a variety of materials like cork and felt, and comes with a moisture barrier most of the time. Acoustical underlayment without a moisture barrier attached should be installed together with a moisture barrier placed directly over the subfloor.

Vinyl-Backed Underlay

Vinyl backed underlay is a practical option for laminate flooring installations because it comes in an easy-to-install tile form. It lays flat during installation and provides noise-proofing qualities. The seams must be sealed, though, if moisture-proofing is a priority.

For any project, it is best to ask the opinion of experts who can help you make the best choice for your home or office. Talk with a knowledgeable BuildDirect product expert for more advice on the best laminate flooring underlay to use in your installation.

(47) Comments

  1. I want to lay lock & fold plank on cement floor. What kind of underlayment do I use and how do I keep it from moving

  2. I am looking to install laminate flooring in my basement thinking of the 12mm what underlayment do you recommend using. I will be putting this on cement flooring.

    Also is there some sort of heating you can put on the cement then the laminate on top?

    Vinyl vs laminate for the floor in by basement? It is underground. I have had water once in 28 yrs.
    Any help is appreciated.

    • BuildDirect Product Expert Team
      BuildDirect Product Expert Team - Reply

      Hi Anita,

      Thank you for getting in touch! You can use water radiant under floor heating under most laminate and vinyl planks but you will need to check the specific warranty of the floor just in case.

      The best underlayment for laminate on top of concrete is the one I have linked below. It not only protects the laminate from the concrete but it will slowly absorb and release any moisture that may occur in a way that does not harm your floor.


      I usually suggest going with vinyl in a basement if you have had water because it is water resistant. Although you may have only had water in the basement once in 28 years, if it does happen again the laminate would be completely ruined whereas the vinyl should be fine. Please let us know if you have any other questions!

  3. Hello

    I’m about to do a lamanite flooring in my trailer. Not too sure on how to do the underlay? Which kind would be best for a high moisture area? Also, how do i tack it down? Should I drop of a few nails in it or just lay it there.

    Thanks for your time

  4. I am about to install my Laminate flooring on a heated cement floor ( well cured) My laminate flooring is a 12 mil with a cushion already on it, I purchased underlay with a vapour barrier to add to the flooring. Is this wise with a heated cement floor ?

    • BuildDirect Product Expert Team
      BuildDirect Product Expert Team - Reply

      Hello Ron,

      If you’re flooring has an underpad attached then you do not want to add a second underpad beneath. Only a vapor barrier would be needed in that scenario and as long as the flooring you purchased is rated for underfloor heating then that should be fine.

  5. I’m installing 12mm laminate flooring over concrete single family residence. I have the moisture barrier down than a 4mm sound barrier pad over it. Do I need a layer of plastic over the pad before I lay down the floors. I’m using the sound barrier pad because i got it for free. Live in Sacramento Ca the temps in winter gets in the 40 degree range in the winter and summer as high ad 110.

    • BuildDirect Product Expert Team
      BuildDirect Product Expert Team - Reply

      Hello Raj,

      You don’t need another moisture barrier beneath the sound pad and the flooring. I would suggest checking if the sounds pad already has a moisture barrier incorporated into it as that is very common. It would save you from using double the moisture barrier. Please let us know if there is anything else we can help out with!

  6. I’m going to install a electric heating floor system (its basically like a big heating blanket material) under my laminate floor. But before I put any of these down i need to come up with a moisture barrier to put down first that will allow me to put the heat material over top of (moisture barrier) and then laminate floor over top of (heat material) correct??? Reason for all this being is i get a lot of water through my basement right now which will get fixed but not till later down the road. The new floor will be installed on the first floor……..So i need some ideas or thoughts. Facts always help too……Please and Thank you

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