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Schluter Systems
Schluter KERDI Membrane

Schluter Systems

Schluter®-Systems develops products specifically for the tile industry to ensure that installations maintain integrity and durability. The Schluter product line includes tile trims, uncoupling membranes, floor heating systems, waterproof building panels, and shower systems.

For more detailed information on any of their products it is highly recommended to go to their Web Site to see all of what they offer and they have plenty of instructions and information.

Installing Schluter®-KERDI over solid backing for Walls and Ceilings

The thin-set mortar used for bonding KERDI membrane to walls and ceilings must be appropriate for the substrate and must penetrate and engage the membrane fleece. For most substrates (e.g., gypsum board or CBU), an unmodified thin-set mortar is used. The mortar must be mixed to a fairly fluid consistency, but still able to hold a notch.

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Schluter Systems 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. Schluter Systems Place painter’s tape to protect the tub deck. Apply unmodified thin-set mortar to the solid backing using a 1/4" x 3/16" V-notched trowel or the KERDI-TROWEL. Completely fill the 1/4"-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. Schluter Systems Apply KERDI-BAND waterproofing strips or 5"-wide cut sections of KERDI waterproofing membrane. Solidly embed the membrane in the mortar and KERDI-FIX toensure full coverage and remove air pockets.
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Schluter Systems Apply 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. Schluter Systems Seams in the membrane are constructed by overlapping the edges of KERDI by 2" or by abutting adjacent sheets of KERDI and installing KERDI-BAND, centered over the joint. Schluter Systems Any protrusions through the KERDI membrane (e.g., mixing valve, shower head, etc.) must be sealed with KERDI-SEAL-PS/-KERDI-SEAL-MV, KERDI-FIX, or other suitable sealant.
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Schluter Systems Seal connections to knee walls using KERDI-KERECK-F preformed corners and unmodified thin-set mortar. Note: See KERDI-BOARD-SN Installation for shower niche instructions. Schluter Systems Once the entire membrane, including seams, corners, and knee walls have been completely bonded and, therefore, waterproofed, the assembly is ready to be tiled.

KERDI 200/10M
108 sq.ft. roll of Kerdi Membrane

3'3" x 33'



Purchase Kerdi Membrane by the foot

3'3" Wide

  Enter How Many Feet:

$6.96/lin. ft.




Various KERDI waterproofing accessories are available. Use KERDI-BAND to seal butt joints or corner joints. KERDI-KERECK pre-formed seamless inside and outside corners and KERDI-SEAL-PS for sealing around pipes or KERDI-SEAL-MV seals mixing valve protrusions, and KERDI-DRAIN Assemblies. KERDI-TROWEL also available for installation of thin-set mortar.

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