Installation Instructions

The WATER-STOP installation for waterproofing must start laying the first sheet at the lowest point

and then overlap the next layer.

Apply the membrane to the entire floor surface and up the walls. WATER-STOP should be turned

up wall a minimum of 2 inches and at least to flood point.

3.4.2. Walls

Treat pipe penetrations and mixing valves with W-S TUBO.

Start in a corner and work your way out from the corner to the edge of the installation. Apply the

thin-set to the surface.

Install the first length. It may be easiest to unroll the sheet membrane up the wall. Be certain to

overlap the upturn sheet from floor at least 2” (5 cm). Smooth the section of WATER-STOP

membrane with a flat trowel or hand roller from the middle towards the outside edges to assure

that no air is trapped underneath.

Then install the next layer leaving overlaps free. The remaining lengths can now be installed in this

same manner.

3.5. Shower Pans

Verify that floor has proper slope and shower drain is installed.

Start with the floor section first bay connecting with shower drain and taking the perimeter of the floor

membrane up the wall a minimum of 2’’.

3.5.1. Shower Drains

For shower drains, refer to the Drains section above.

For EVOLUX System shower drains, refer to product installation instructions.

3.6. Bathtub Surrounds

Keep a 1/4 inch gap between the top edge of the bathtub and the bottom of the substrate.

Apply Urethane sealant or MS Polymer sealant to the top edge of the bathtub to the substrate, and

then imbed the bottom edge of the WATER-STOP membrane into the sealant (Figure 4).

3.7. Seaming & Joining

When more than one sheet is needed we must seam sheets together. Seams can be done after all

sheets have been installed. Seam areas must be clean and free of bond breakers (mortar, adhesives,

etc.)

Seams can be constructed by overlapping the edges of the WATER-STOP, or by abutting the edges and

covering the joint with BANDA W-S 14.

By overlapping: The edges of the WATER-STOP adjacent sheets should be lapped 2-3" (5-8 cm) in

direction of water flow to drain. Seams must be made using a latex modified dry-set cement mortar

conform to ANSI A118.4, or using Urethane sealant or MS Polymer sealant for a water-tight seam.

By abutting and joint covering: Lay the BANDA W-S 14 tape over the joint. Make sure that the tape

overlaps each WATER-STOP membrane section by a minimum of 2” (5 cm). Seam using a latex

modified dry-set cement mortar conform to ANSI A118.4, or Urethane sealant or MS Polymer

sealant for a water-tight seam. For any sections where two strips of BANDA W-S 14 tape will be

joined, be certain to overlap the material by 2” (50 mm).