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How to repair gap under hybrid floor?

I have hybrid floating flooring throughout my house. It was laid on top of pine floorboards 5 years ago. Levelling compound was used initially, but there is a soft spot in a high traffic area and it is beginning to crack. I would rather avoid pulling up the floor but could possibly access underneath as we are on stumps. Is there something I can inject from underneath through a drilled hole?

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EricL

Hello @danmonde

Welcome to the Bunnings Workshop community. It's sensational to have you join us and thanks for sharing your question about your hybrid flooring.

I'm sorry, but I'm currently unaware of this type of filling product you are referring to. I have seen a similar product that raises concrete walkways, but that uses specialized pumps and equipment to make it work. I'm aware that you are not keen on removing the hybrid flooring, but I think this is the best way to address the dip in your flooring. Self-levelling compound can be applied to the uneven portion of your floor and repaired properly.

Another option is to hire a trades person to disassemble the flooring for you and you can do the repairs. Once the flooring level has been fixed, you can have them reassemble the flooring for you.

Let me call on our experienced members @Dave-1 and @Nailbag for their recommendations.

If you need further assistance, please let us know.

Eric

Dave-1

https://www.workshop.bunnings.com.au/discussion/comment/48572#Comment_48572

Good Morning @danmonde

Like @EricL I have seen the process for lifting and releavling concrete slabs. I have not come across anything that could be injected under a floating floor. My first thought would be that it would be extremely hard to control to keep the surrounding flooring level.

I would remove the section of floating boards from the top, redo the area that is cracking, repair it and replace.

One thing to consider is how level the whole floor is? Has something else caused the cracking of the poured leveler? The only reason I mention it is I have a house with timber floorboards on stumps and my floor has a dip in it and has been getting slowly more so. In the process of getting it fixed but something to look at if you are going to pull up your flaoting boards.

Dave

Nailbag

Hi @danmonde

You would have to be dead accurate if going from the sub-floor in both position and har far to drill the hole without going through the floorboard. But yes it's doable. I have done it several times but only from above. I have drilled about a 6mm hole with a precision wood bit for a clean hole. Then applied just a normal silicone in to the hole with enough to fill the board want to lift. I tapped the hole and rested a flat board with weights on it.

After a few hours I removed the tape, cut out some of the silicone out of the hole and used as close to matching colour filler. I have also removed boards, when the issue below is more wide-spread. I have the task to do in the next few weeks at a mates place. I'll be recoding the steps with photos to post.

Nailbag

danmonde

That's really helpful. Keep me posted. Maybe I drill from above then.

Dave-1

https://www.workshop.bunnings.com.au/discussion/comment/48624#Comment_48624

Morning @danmonde and @Nailbag

Definently interested in the process @Nailbag, looking forward to that project 🙂

Dave

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