Construct Shower Pan, Curb, and Bench with Waterproofing
At 7:34 in
Building a GIANT Shower (Home Remodel)
What happens here
Construct a shower pan curb by laying down two pressure-treated 2x4s and securing them with long screws into the subfloor. Next, build a shower bench frame from 2x4s and top it with OSB. Secure 2x6 scrap pieces to the base of the walls inside the shower area. This creates a raised edge for the waterproofing liner to wrap up against. Mix a mortar bed, starting with a 1-inch thickness at the edges and sloping down to 3/8-inch at the drain. Lay down a PVC shower pan liner, folding the edges upwards and securing them to the top of the 2x6 boards. Seal the liner around the drain using silicone and a two-piece drain assembly. Place small pea gravel around the drain and then apply a second layer of mortar bed, ensuring a proper slope towards the drain (1 inch down to 1/2 inch).
Goal: Build a waterproof shower pan, curb, and bench that effectively directs water to the drain.
Tools and materials
- 2x4 Lumber — Framing the shower bench
- 2x6 Scrap Pieces — Creating a raised edge for the waterproofing liner
- Impact Driver Dewalt — Securing lumber for the bench and curb
- Level Stanley — Ensuring proper slope and straightness
- Long Screws — Securing the shower curb to the subfloor
- Mixing Bucket — Mixing mortar
- Mortar Mix — Creating the shower pan slopes
- OSB — Topping the shower bench
- PVC Shower Pan Liner Oatey — Primary waterproofing layer for the shower pan
- Paddle Mixer — Mixing mortar with a drill
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