Squeaky subfloor under new engineered hardwood

BrokenArrows

I thought i had fixed all the squeaks in the subfloor before laying my engineered hardwood floor.

But unfortunately i missed one or one has appeared. Its pretty loud so cant be ignored.

The engineered wood is floated on underlay and glued together so i cant lift it.

Any ingenious solutions before i cut a hole in the ceiling below and fix from underneath?

BrokenArrows

So I ended up propping up the floor by a few inches very carefully as i hadnt gone right up to the wall on one side. Getting some expanding foam and spraying a bunch of it onto the sub floor under the underlay around the squeaky area.
Dropping the floor down and putting some heavy stuff on top which squished it out level.

I kept an eye on it and checked it with a level a few times over the next few hours to make sure it didnt rise or sink while the foam cured.

My idea was the foam would squash and expand into all the gaps in the subfloor and hopefully stop the noise once it cured.

It seems to have worked. At least in the short term. We will see how long it lasts but its not a high traffic area so hopefully it will last.

WildCardDoW

BrokenArrows wrote: »

So I ended up propping up the floor by a few inches very carefully as i hadnt gone right up to the wall on one side. Getting some expanding foam and spraying a bunch of it onto the sub floor under the underlay around the squeaky area.
Dropping the floor down and putting some heavy stuff on top which squished it out level.

I kept an eye on it and checked it with a level a few times over the next few hours to make sure it didnt rise or sink while the foam cured.

My idea was the foam would squash and expand into all the gaps in the subfloor and hopefully stop the noise once it cured.

It seems to have worked. At least in the short term. We will see how long it lasts but its not a high traffic area so hopefully it will last.

Credit for posting the solution when none was offered!