Return to the Flooring Forum | Post a Follow-Up

Squeaky floor under new porcelain tile

Posted by gemini16 (My Page) on
Mon, Feb 18, 13 at 10:38

We are remodeling a small bathroom. There wasn't a squeak before the install. Now, there's a squeak that's loudest by the tub. I do see some mortar touching the tub and we are trying to scrape that out now but of course is dried solid.

Does anyone have any other suggestions of why the floor would be squeaking now? We do have some access to the floor from the basement but all the plumbing is in the way.

Appreciate any suggestions.

Follow-Up Postings:

RE: Squeaky floor under new porcelain tile

Did you assess the deflection of the joists before beginning? Possibly reinforce those joists to be stiffer? Put down a new 3/4" subfloor? Put down cement board or a decoupling membrane on top of that? Use sanded caulk at all changes of plane between the horizontal and vertical (like your tub and any wall)?

All of that is necessary for a tile installation.

RE: Squeaky floor under new porcelain tile


Thanks for the ideas live wire. We've had SUCCESS. After scraping all the mortar out from between the tile and tub 1/8" gap, the squeak is totally gone! Thank goodness. Everything in the bathroom has come out really well so far and I was sick thinking about a brand new bathroom with a horrible squeak.

Maybe this post will help someone else in the future.

RE: Squeaky floor under new porcelain tile

"Maybe this post will help someone else in the future."

Grout does not get used at changes of plane in tile work.

Caulk does.

RE: Squeaky floor under new porcelain tile

Yes, thank you. It wasn't grout up against the tub. It was just a few little bits of mortar that I had to carefully look in the 1/8" gap to even see them on the floor. I didn't mortar up to the tub but obviously I wasn't as careful as I should have been. We will caulk there as well.

RE: Squeaky floor under new porcelain tile

i'm having the same problem with a new bathroom renovation. i have an acrylic bath tub installed with the tile floor grouted right up to the bath tub side. the gap is 1/8 and i'm wondering what is the best way to remove the 60" grout line between the tub and tile. and if there is mortar up against the tub, how would that be removed?

the squeak is driving me nuts.

RE: Squeaky floor under new porcelain tile

If you have a squeak, you have bigger problems than just grout or thinset rubbing against your tub - you have too much deflection in your floor for your tile installation.

As to removing the grout, a Dremel with a carbide grout removal bit will do the job.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Flooring Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here