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Floor insulation


Adam E

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I Have concrete slab seems very level but I have put down the membrane and 150mm insulation boards

 

a few boards have a slight rocking no-more than 5-6mm Its a twist in the insulation board as if I swap the board problem solved but I can’t return the boards

I am putting down castellated panels for ufh and a dry screed mix, Should I be concerned about the uneven boards  ? and if so what’s the best way to fix the problem.  

 

 

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Cut the board across the centre of where it rocks.

 

I had this, where an existing floor met a newer floor - so I the jointed the boards at that point.

 

The screed installer told me not to worry as I had a couple of boards that still rocked a couple of mm, he said the weight of the screed will hold them down.

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