Popping sound under fiberock

Discussion in 'Flooring' started by Greg9840, Sep 24, 2019.

Help Support House Repair Talk by donating:

  1. Sep 24, 2019 #1

    Greg9840

    Greg9840

    Greg9840

    New Member

    Joined:
    Sep 24, 2019
    Messages:
    1
    Likes Received:
    0
    Location:
    Florida
    I purchased engineered wood flooring at my local flooring store and they subcontracted the installation. My bedroom's concrete (slab) floor is about 2 inches lower than the marble tile in the hallway that leads to my bedroom. In order to raise the bedroom floor to make less sudden transition, the contractor decided to lay fiberock tile backer board on the floor on top of a high-end type of thinset-type of material (I forgot the name of it) that the manufacturer says can be laid up to 3/4 inch thick. So the heavy duty thinset-type of material added 3/4 inch, the fiberock added 1/2 inch, and the engineered wood, after it is laid down will add 1/2 inch, bringing the height difference between the 2 rooms to only 1/4 inch.
    So they laid down the fiberock a couple of weeks ago (there was a delay on the wood installation) and they used a wedge/spacer leveling system to minimize any lippage. Now, when I walk on the fiberock, it sometimes randomly makes a very loud popping sound, almost like bubble wrap or popcorn popping. Not a bunch of pops at once but just one loud pop. And I usually can't replicate it if I step in the same spot twice. But hours later I can sometimes make it pop again in the same spot.
    The flooring store and the contractor can't figure out the cause of the noise. They screwed down some of the fiberock using tapcon screws and the floor still pops randomly when walking on the boards. At this point, they are running out of ideas and are thinking that the spacers from the leveling system are somehow rubbing in between the fiberock boards and the slight movement from walking on the fiberock pushes the plastic spacer and is making the popping sound.
    I think it's more likely that it's the thinset/mud material under the boards making the sound but they are saying that would be more of a crunchy gravel type of sound, not a single pop.
    Any ideas what can cause this kind of noise? We obviously don't want to glue down the engineered wood until we eliminate the popping sound.
    Thanks!
     
  2. Nov 30, 2019 #2

    CoolYeah

    CoolYeah

    CoolYeah

    Member

    Joined:
    Nov 8, 2019
    Messages:
    7
    Likes Received:
    1
    Location:
    Guangzhou
    Seasonal variations in humidity levels also cause these sounds.If your floors are nailed down to the subfloor, enter the floor from below and drive the screws into the loose boards.
     
  3. Nov 30, 2019 #3

    Gary

    Gary

    Gary

    Well-Known Member

    Joined:
    Oct 3, 2005
    Messages:
    661
    Likes Received:
    460
    By his description, it's on a slab, so he doesn't have access to the floor from below.

    When you say randomly do you mean it will pop randomly in several places around the room or there's 1 spot where it will sometimes pop? If it's 1 spot, more tapcons may fix it. If it's the whole room, I'll defer to someone else.
     
  4. Dec 1, 2019 #4

    Rusty

    Rusty

    Rusty

    Flooring installer Staff Member Admin Moderator

    Joined:
    May 20, 2010
    Messages:
    1,753
    Likes Received:
    65
    Location:
    Missouri
    Putting tile backer board on a concrete floor is not a great idea in the first place. I would not believe anything they say after they did that.
     
    Jeff Handy likes this.

Share This Page