Originally Posted by joecaption
If it's on concrete then it has to be pressure treated.
What do you mean by a sill seal? Sill seal is foam that sets on a foundation before the mud sill goes down.
Use Advantec subflooring not plywood or OSB. Far more resistant to moisture.
I'm putting the 2 by 6's on end,they will be sitting on the concrete floor.
Then I will attach a 3/4 inch base to that.
Then I will put the shower insert floor on that,and nail flanges to the wall studs.
I will set the shower base in a thinset mortar.
The sill sealer is going to be attached to the edges of the 2 by 6's where it meets the concrete as a capillary break.
Are you saying to use the Advantec in leiu of the 3/4 inch plywood?