Shower Stall Installation Instructions


Installing a retrofit, stand-alone shower stall is becoming an increasingly easy process in large part because of modular shower units. Modular shower stalls generally consist of four pieces (a shower pan, back wall and two side panels) that all snap together once secured to the shower frame. If you plan for the project properly and the supply lines are already roughed in, your shower stall installation can be completed in a single weekend.

Shower pan installation

  • The first step of installing a shower stall is to set the mortar support foundation by applying a layer of mortar and then covering it with plastic wrap to prevent it from sticking to the shower pan. Place the shower pan on top of the mortar support floor and check to make sure it is level. Once level, secure the shower pan to the framing by either drilling holes in to flange at the study locations or by using large-headed roofing nails to secure the flange's edge. Next, insert the drain and shower pan. The drain is installed by threading the drain assembly through the hole in the shower pan.

Sizing up panels

  • Measure the locations of the faucets and transfer onto the side panel of the shower module. Drill appropriately sized holes with a saw, being careful not to make any mistakes since there is little margin for error. Check to make sure the side panel fits well over the plumbing fixtures. Verify that it aligns with the back panel but do not install just yet. You must first clean the shower pan's edges and caulk the area around the shower pan.

Shower wall installation

  • Next, install the back wall of the shower stall by setting it onto the receptor. Most modular shower stalls have notches to assist with alignment. Once locked in place, install the side panels and position them by locking the bottom and side tabs together with the back wall. Secure the back and side panels to the framing using the fasteners recommended by the shower stall manufacturer.

Finishing touches

  • Once the shower stall is secured in place, install moisture-resistant dry wall in the areas surrounding the panels. Caulk the area between the wall and the side panels to create a seal. Finish the shower installation by connection the drain, drain cover, faucets, handles and showerheads as directed by the manufacturer's installation instructions.

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