Shower Pan On A Wood Floor Plywood Thickness

No matter what the building inspector says it s not a good idea to install a pan liner and then a single sloped mortar bed over it.
Shower pan on a wood floor plywood thickness. Over the membrane a mortar bed floor supports the tile. When choosing your subfloor material take into consideration how the thickness will effect the overall heigh of the built up shower pan in relation to your shower curb. After you have put down a double layer of plywood to provide the base for a custom walk in shower pan you need to cover the subfloor with a layer of tar paper in this case referred to as a vapor. Reinforce the shower pan.
The key to a successful installation lies in the use of a chlorinated polyethylene cpe or pvc membrane tough but flexible plastics that form the pan of the enclosure and make the floor waterproof. Water that gets into the mortar bed won t be able to drain out. A mortared shower pan allows you to custom fit a shower enclosure. Where a rotten subfloor is left unattended the rot may extend to the floor.
I used an unbonded mortar bed so i have a tar.