Tub/Shower waterproofing system

Schluter....Worth every penny. (Tile Installer for 20 years)

Schluter has a tech helpline and they are very good. I etched the tub deck at the contact point of my schluter board(Wall board of your choice), ran a bead of approved caulking, applied the Kerdi(if not using the Schluter board) per instruction. Tiled and then ran a bead of color-match caulking at tub line.

It's been 10 years since I've done any tile work so there may be better techniques or products.

But run it by the Schlueter Tech guys and if you follow their advice and direction, you will have a lifetime warranty.

Schluter tub surround kit:

Schluter®-KERDI-TUBKIT
Complete bathtub surround kit
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The Schluter®-KERDI-TUBKIT contains all the components necessary to create a fully waterproof and vapor tight bathtub surround assembly.

Per schluter system:

For complete installation guidelines and warranty criteria, please download the Schluter®-Shower System Installation Handbook and view the installation video available below.

1. Clean any dust or other debris from the surface of the solid backing. Dampen particularly dry and porous substrates in order to help prevent premature drying or skinning of the thin-set mortar.

2. Place painter’s tape to protect the tub deck. Apply Schluter SET™, ALL-SET™, FAST-SET™, or unmodified thin-set mortar to the solid backing using a 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel or the KERDI-TROWEL. Completely fill the 1/4" (6 mm)-wide gap between the solid backing and tub with KERDI-FIX or other suitable sealant. Note: When the solid backing is installed above the tub flange, apply KERDI-FIX to the tub flange and spread using a small notched trowel.

3. Apply KERDI-BAND waterproofing strips or 5" (125 mm)-wide cut sections of KERDI waterproofing membrane. Solidly embed the membrane in the mortar and KERDI-FIX to ensure full coverage and remove air pockets.

4. Apply Schluter SET™, ALL-SET™, FAST-SET™, or unmodified thin-set mortar to the solid backing and previously applied KERDI-BAND. Embed the KERDI in the thin-set mortar and work the membrane onto the entire surface to ensure full coverage and remove air pockets.

5. Seams in the membrane are constructed by overlapping the edges of KERDI by 2" (50 mm) or by abutting adjacent sheets of KERDI and installing KERDI-BAND, centered over the joint.

6. Any protrusions through the KERDI membrane (e.g., mixing valve, shower head, etc.) must be sealed with KERDI-SEALPS/-MV, KERDI-FIX, or other suitable sealant.

7. Seal connections to knee walls using KERDI-KERECK-F preformed corners and Schluter SET™, ALL-SET™, FAST-SET™, or unmodified thin-set mortar.

8. Once the entire membrane, including seams, corners, and knee walls have been completely bonded and, therefore, waterproofed, the assembly is ready to be tiled.

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there may be better techniques or products.

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There is not.

I've done standing showers, and multiple bathtub/shower combos, never had any issues with putting up hardi board, using hardi screws taping the seams with mesh tape, using this set on that and then using redguard and painting on 2 layers, can even do 3 layers.

a lot of people have been using this method for a long time and no issues, also it's much simpler than some other methods and a hell of a lot cheaper in addition.