Shower Pan On A Wood Floor Plywood Thickness

A plywood subfloor under a shower also known as underlayment is vulnerable to moisture damage that can rot the wood.

Shower pan on a wood floor plywood thickness. Over the membrane a mortar bed floor supports the tile. Reinforce the shower pan. A mortared shower pan allows you to custom fit a shower enclosure. 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.

A piece of plywood can be purchased in 1 2 or 3 4 thickness and most cement backer boards will be 1 4 1 2 or 5 8 thick. 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. Where a rotten subfloor is left unattended the rot may extend to the floor. Water that gets into the mortar bed won t be able to drain out.

Install the liner over a pre sloped bed as i explain here.