Shower Base Installation Instructions

Watch the video below and learn how to install a custom, one-piece Meridian Solid Surface shower base from Tower Industries in Massillon, Ohio. Meridian Solid Surface is the preferred material for shower bases, shower wall panels, and shower accessories in all commercial and institutional applications due to its renewability and ease of maintenance.

1. Thoroughly inspect the shower base to assure that no damage has occurred during shipping or handling. DO NOT proceed with installation if there is any sign of damage or defects.

2. Clear installation area of all debris and remove any protruding nails or foreign objects from the surrounding walls. Check the floor for level and DO NOT install the base if the subfloor is not level or if the out-of-level condition cannot be corrected with a floor-leveling adhesive.

3. Dry fit the shower base in the installation area to assure that the shower base fits within the confines of the intended space. There should be a one-eighth inch space between the outside edges of the shower base and each of the surrounding walls. This space will allow the shower base to expand and contract with temperature changes and will be ultimately concealed by your wall-board.

4. Remove the base after dry fitting and install the floor drain strainer assembly (Click Here for Instructions) into the shower base orifice according to the instructions provided with the drain. The drain may be installed after the installation is complete, but ONLY if you have access to the drain orifice from underneath the installed base.

Please Note: Tower recommends the use of synthetic, non-oil-based plumbers putty, such as Hercules "Sta-Put" brand or any plumbers putty noted as "stain-less"

5. Apply thin-set adhesive or floor-leveling adhesive to the floor where the base will be installed, using a 1/4”x1/4” notched trowel. Ensure that the adhesive is spread so as to provide full, even contact between the shower base and the sub-floor below. (i.e. the adhesive should completely fill all voids between the bottom of the base and the floor sheathing).

Please Note: You may use mortar mix in place of the adhesive, so long as you maintain full, even contact between the shower base and the floor. If you opt to do so, please use the manufacturer’s recommended application tool(s).

6. Set the base in place on top of the adhesive. Check that the shower base is level, both front-to-back and side-to-side, by placing a level on top of the water dams. Careful attention to this step will ensure proper drainage during use.

7. Moisture-resistant wall board or cement board should be installed on the adjacent walls after the shower base has been set. The wallboard will abut the highest point of the water dam. Please refer to the Shower Wall Panel Installation Instructions below to continue with the installation of your Meridian Solid Surface shower.

Shower Base Installation Instructions

Disclaimer: All installation instructions are provided as a recommendation only and are not intended for design purposes. Tower Industries makes no representations or warranties of any kind concerning these instructions. Tower Industries strongly recommends that the installer test the installation materials and methods in the anticipated service conditions to determine suitability. Due to variances in types of adhesive, installation skill, and jobsite conditions, Tower Industries cannot accept liability for the results obtained.

Printable Shower Base Installation Instructions

Shower Wall Panel Installation Instructions

Shower Wall Panel Installation Instructions

1. Verify that the shower base or bathtub is properly installed and level. Also verify that moisture-resistant wallboard or cement board has been installed down to the highest point of the water dams.

2. If recessed soap and shampoo holders are going to be installed, locate and mark the area for the cutout in the wallboard, ensuring that there are no wall studs, wires, or pipes in the way. Cut the hole in the drywall approximately ½" smaller than the accessory.

3. Beginning with the back wall panel, place the wall panel in its intended location WITHOUT any adhesive applied. Mark locations and amounts to be trimmed or scribed, as well as the locations of plumbing and accessory cutouts. Cut openings in the panel as necessary for plumbing and accessories. Trim/scribe edges of panel so that the resulting gap at the perimeter is not more than 1/8" when installed.

  1. Use a carbide hole saw to cut smaller holes.
  2. Use an electric router with a single-flute bit to cut larger holes or irregular shapes. As an alternate, you may also use a jig saw with an abrasive blade (look for the package labeled "for ceramics" or "glass and tile"), but be aware that this method may result in chipping of the edge, which must be sanded smooth prior to proceeding.
  3. Use a circular saw with a masonry blade or a belt sander with 80-grit sandpaper to trim and scribe wall panel.

Please Note:

  • Make all cuts from FINISHED SIDE and be sure to PROTECT THE SURFACE with masking tape.
  • DO NOT leave square inside corners when adding cutouts to wall panels. ALL inside corners must have a small radius to avoid creating the potential for cracks later.
  • Lightly sand the inside of all cut openings to remove any small chips that may have occurred during the cutting process. The inside of the cutout should be smooth to the touch with no sharp edges.
  • Unless otherwise specified at the time of order, shower wall panels are typically supplied slightly oversized for trimming and scribing at time of installation.

4. Once all trimming, scribing, and cutouts have been completed, clean the back of the panel thoroughly with isopropyl alcohol or acetone. (Please check local laws regarding the use of acetone and/or other solvents in your area). Then, apply a heavy, continuous bead of construction adhesive or 100% silicone adhesive around the perimeter of the panel about 1-1/2" in from each edge. Continue to apply adhesive in large drops per the manufacturer’s instructions in the shape of an “X”, then add additional drops at regular intervals throughout the remainder of the panel so that the adhesive is evenly distributed and the drops are not further than 18" apart.

Please Note: Hot melt adhesive or wood braces may be used to hold panels in place while the adhesive cures. Apply hot melt on each corner approximately 1" from each edge or cut wood braces to wedge against the panels while the adhesive cures, being sure to protect the face of the panels with padding or towels.

5. Repeat steps 3 and 4 for each wall panel.

6. Install shower trim moldings and accessories, if applicable, using construction adhesive or 100% silicone adhesive/caulk

7. Caulk all joints using 100% Silicone caulk or Acrylic Latex caulk.

Disclaimer: All installation instructions are provided as a recommendation only and are not intended for design purposes. Tower Industries makes no representations or warranties of any kind concerning these instructions. Tower Industries strongly recommends that the installer test the installation materials and methods in the anticipated service conditions to determine suitability. Due to variances in types of adhesive, installation skill, and jobsite conditions, Tower Industries cannot accept liability for the results obtained.

Printable Shower Wall Panel Installation Instructions

CornerSeal™ Inside Corner Molding Installation Instructions

Meridian Solid Surface CornerSeal™ Corner Molding Installation Instructions

Step 1 - Install Meridian Solid Surface Wall Panels per published Tower Industries instructions, leaving 5/8" gap between vertical edge of each panel and inside corner of wallboard.

Step 2 - Apply a 1/4" bead of CornerSealant™ adhesive to the wallboard in the corner between the panel edges as shown. Apply two additional beads of CornerSealant™ adhesive to the back side of the CornerSeal™ molding at each outside edge as shown.

Step 3 - Insert the CornerSeal™ molding into the void between the panel edges until the adhesive squeezes out uniformly along the entire length of each vertical edge.

Step 4 - Wipe off the excess CornerSealant™ adhesive from both vertical edges. If the adhesive did not squeeze out uniformly along the entire edge, pull the molding out immediately, add additional CornerSealant™ adhesive, then re-install.

Disclaimer: All installation instructions are provided as a recommendation only and are not intended for design purposes. Tower Industries makes no representations or warranties of any kind concerning these instructions. Tower Industries strongly recommends that the installer test the installation materials and methods in the anticipated service conditions to determine suitability. Due to variances in types of adhesive, installation skill, and jobsite conditions, Tower Industries cannot accept liability for the results obtained.

Installation Instructions for Corner Soap & Shampoo Caddy

Installation Instructions for Corner Soap & Shampoo Caddy

Step 1 - Locate the height at which the corner caddy is to be installed. For most installations, the top of the corner caddy should be between 65" and 75" from the floor. Make a light pencil mark at your preferred height.

Step 2 - Measure down 1-1/8" from your pencil mark and make another mark. This is the height at which the Corner Bracket will be installed.

Step 3 - Using a drill bit that is slightly larger than your fastener, drill a hole diagonally through the corner bracket so that the installed fastener will engage the wall structure through the gap between the wall panels. If there is no gap between the panels (i.e. you are not using a corner molding), then you must also pre-drill a hole in the panels as well.

Step 4 - Install the Corner Bracket at the marked height, being sure to use the appropriate fastener for your wall structure. For wood framing, use a drywall screw or equivalent. For concrete walls, use a Tapcon® fastener or equivalent.

Step 5 - Turn the Corner Caddy face down on a clean, stable surface, being sure to protect the face of the caddy against scratching. Apply a bead of silicone adhesive around the entire perimeter of the caddy where it will adjoin the wall panels.

Step 6 - Hang the Corner Caddy on the Corner Bracket and press the unit firmly against both wall panels. Clean away the excess adhesive at the perimeter as directed by the adhesive manufacturer.

Step 7 - Your Corner Caddy is ready for use after the silicone adhesive has cured per the adhesive manufacturer’s instructions.

Disclaimer: All installation instructions are provided as a recommendation only and are not intended for design purposes. Tower Industries makes no representations or warranties of any kind concerning these instructions. Tower Industries strongly recommends that the installer test the installation materials and methods in the anticipated service conditions to determine suitability. Due to variances in adhesives, installation skill, and jobsite conditions, Tower Industries cannot accept liability for the results obtained.