Some advice please.
I have 100mm concrete that was laid on a plastic sheet on sand on hardcore.
I am now battening the floor with 25mm X 50mm battens on top of which I am laying 22mm P5 T&G Chipboard.
In between the battens I am laying 25mm insulation (sadly only polystyrene sheets as I have been waiting for ages for Kingdom or Celotex but it is not available.
I think I need another DPC to prevent any additional moisture coming from the concrete but I am not sure where it needs to go.
Do I put it under the battens or on top of the battens and insulation.
I was going to screw the battens to the concrete and screw the chipboard to the battens both of which will penetrate the DPC that I am about to lay?
I have 100mm concrete that was laid on a plastic sheet on sand on hardcore.
I am now battening the floor with 25mm X 50mm battens on top of which I am laying 22mm P5 T&G Chipboard.
In between the battens I am laying 25mm insulation (sadly only polystyrene sheets as I have been waiting for ages for Kingdom or Celotex but it is not available.
I think I need another DPC to prevent any additional moisture coming from the concrete but I am not sure where it needs to go.
Do I put it under the battens or on top of the battens and insulation.
I was going to screw the battens to the concrete and screw the chipboard to the battens both of which will penetrate the DPC that I am about to lay?