Can I Glue underlayment to the subfloor?

Can I Glue Underlayment Down On My SubFloor?

The question of whether you should glue underlayment down to a subfloor may come up if you are installing flooring for the first time. You want to make sure you have a solid foundation for your new flooring. You would think this would extend to your underlayment.

Should I Glue Underlayment Down?

No, you should not glue down your underlayment. Underlayment is is a floating material, the same as your laminate flooring. In most cases, you should not glue or nail your underlayment down. You should always check with the installation instructions of the underlayment for proper installation instructions first.

Learn more about installing underlayment here.


  1. Thanks for your question, Roxanne. We do not recommend using underlayment with laminate flooring on stairs. The underlayment would not be secure to the laminate planks and could cause issues in the future, as well as void the warranty.

  2. Hi! I’m laying laminate flooring on stairs and I really need an underlayment for sound proofing (condo). Is it ok to cut the underlayment to size, lay the planks on top, and nail/glue both down to the subfloor? This seems pretty straightforward to me but all laminate plank manufacturers tell you not to use underlayment, even if nailing/gluing down. Please help! Thank you!

  3. Hi Thomas! If you are installing the hardwood as a floating floor, you will need not need to attach the underlayment to the subfloor. You would just lay it out on the subfloor and install the hardwood over top. If you are installing the hardwood by nailing it, you would lay the underlayment on the subfloor, install the hardwood on top and nail through both the hardwood and underlayment. If you are nailing the hardwood, we recommend using a high density underlayment to help with sound dampening. Hope this helps!

  4. I am installing 3/4 in tongue and groove flooring 2,3 and 4 in wide hardwood.I have installed 3/4 in plywood as a subfloor.How should the 1/4 in underlayment be attached to the subfloor?

  5. Hi Dawn, this is correct. Usually underlayment will float under the floor without any need for adhesive.

  6. I read you should not glue or nail down underpayment

  7. Hi Seth, thanks for the question. We do not do installations, so I am not sure what a rate would be. This shouldn’t be that much additional time or effort for your installer.

  8. we are having a glue down wood floor installed that requires an underlayment because it is in a condo. is there a going rate to install a glue down underlayment? i just want to know if the installers are overcharging me

  9. Hi Karen, the adhesive you use should protect against water damage. You will not need a vapor barrier if you plan to glue your vinyl.

  10. We are putting the floor on concrete with a 6 mil vapor barrier. I want to put us all over the floor but will need to place cabinets on it as well. I know that it is recommended not to place cabinets on the floor due to buckling. If we glue it down then we can. My question is, still use the vapor barrier and slur on it? Or don’t use the vapor barrier and glue to the cement? Thanks for your assist!

  11. Hi Gary, thanks for reaching out. When installing on concrete, we recommend using a moisture barrier to prevent moisture from seeping up from your subfloor and sitting beneath the flooring. Although the flooring is 100% waterproof, this will prevent any mold and mildew beneath your flooring. 6 mil poly will be perfect! We offer Visqueen Vapor Block PE Film Flooring Underlayment, you can take a look here:

  12. If plank vinyl flooring is waster-proof, why is a vapor barrier recommended? if on a concrete slab where moisture intrusion is suspected?Also, is 6 mil poly good for this?

  13. Hi Tammy, thanks for reaching out! Here at Bestlaminate, we do not carry VCT tile flooring so we do not have recommended underlayment options for that application. We do offer luxury vinyl plank flooring, and with that, we would recommend Floor Muffler LVT Ultraseal Flooring Underlayment. It is a high-performance acoustic underlayment and moisture barrier, that will provide some cushion for your flooring, perfect minor subfloor imperfections and help reduce foot fall noise. Keep in mind, that vinyl is a hard surface so there is no way to really provide additional cushioning beyond what underlayment can do. Would you like us to send you samples of our underlayment options so you can feel the difference?

  14. I’m looking at all the choices for underlayment. This is a working studio, new construction on wood with a crawlspace and moderate humidity. My primary concern is cushion and not noise reduction. The flooring will be VCT tile. Does cork underlayment really provide a cushion? My current studio has VCT tile, moisture barrier over concrete. It is really hard on my legs and back. I’m getting older and want to make the best choice this time around. I have Gel Anti-fatigue pads in the place I stand the most but the new studio is much bigger and I’d have to get 4 more just to cover the same workstations. They are expensive and UGLY so I’d like to just make my floor better everywhere instead of having them spread around even if it costs more. Also, is 6mm cork significantly more cushion than 3mm cork. Is there anything better than cork? Since VCT has no locking, isn’t floating and is glued down, I’m thinking a glue in product would be best.

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