Laminate on tung and groove

[gemshan1]

Hi about a year ago I laid good quality laminate throughout my bungalow onto old tung n groove which seemed pretty solid, it’s now starting to creak when walking on, I know now that maybe I should have laid a ply sub floor first? I’m now thinking about taking it up and laying plywood and then relay the laminate, my question is what thickness of ply would I need! Thanks

 

[big-all]

assuming its quality unglued you will probably still need a few new planks have you any spare
5.5/6mm will be fine
is the flooring nice and level and well fixed down ??

 

[gemshan1]

Yes the tung n groove is well fixed down But probably not level ie the creaking in the laminate, how would you fix the ply, by screws?

 

[bobasd]

its possibleyou could give yourself problems if you raise the floor with the ply?
like bigall i'd be concerned about the t&g an thatthe joists under the t&g are solid an firm?
you have to go over the t&g boards one at a time an face screw them down if they seem shaky.
does the present laminate have a thick expensive underlay?

yes you screw ply down usin screws just long enough to penetrate the ply an go deep into the t&g boards but dont penetrate out ofthe boards.

 

[foxhole]

If it’s not too bad talc brushed into gaps will ease squeaks.

 

[gemshan1]

Thanks but it’s past that.

 

[foxhole]

Thanks but it’s past that.

If it’s past that it suggests the underfloor is shot , laminate does not creak on a level,even,secure floor.

 

[gemshan1]

If it’s past that it suggests the underfloor is shot , laminate does not creak on a level,even,secure floor.

That’s why I’m asking what thickness plywood sheets to use.