Raising Concrete Floor to Exisiting Suspended Timber Level

[IanNE]

My floor needs to be raised by approx 20mm the same thickness as tongue and groove flooring.

This is for my downstairs toilet, the existing floor is concrete sat on insulation. It needs to be flush with the wooden floor in the next room.

Whats the best way of doing this, screwing plywood down? Or can I use some type of self levelling compound..

I'd prefer not to have the step and deviation in heights if I can help it..

Thanks

 

[Nige F]

having done both ways I would go for WBP plywood Just watch out for any buried heating/water pipes