Schluter®-KERDI & KERDI-DS

Schluter®-KERDI is a pliable sheet-applied waterproofing membrane and vapor-retarder designed for the direct application of tile. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas.

KERDI-DS is a bonded waterproofing membrane and vapor retarder with very low water vapor permeance for use in continuous-use steam rooms and similar applications.

  • Sheet-applied polyethylene waterproofing membrane and vapor retarder
  • Eliminates water damage which can lead to mold and mildew
  • Features an anchoring fleece on both sides to anchor the membrane in thin-set mortar
  • Ideal for waterproofing in conjunction with tiled surfaces on walls and floors
  • Emits zero VOCs and can contribute towards achieving green building credits
  • KERDI is 8-mil-thick and guarantees uniform thickness
  • KERDI-DS is 20-mil thick, features additives to produce a water vapor permeance of 0.18 perms, and is listed by cUPC® and evaluated by ICC-ES
Read more

Schluter®-KERDI is a pliable sheet-applied waterproofing membrane and vapor-retarder designed for the direct application of tile. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas.

KERDI-DS is a bonded waterproofing membrane and vapor retarder with very low water vapor permeance for use in continuous-use steam rooms and similar applications.

  • Sheet-applied polyethylene waterproofing membrane and vapor retarder
  • Eliminates water damage which can lead to mold and mildew
  • Features an anchoring fleece on both sides to anchor the membrane in thin-set mortar
  • Ideal for waterproofing in conjunction with tiled surfaces on walls and floors
  • Emits zero VOCs and can contribute towards achieving green building credits
  • KERDI is 8-mil-thick and guarantees uniform thickness
  • KERDI-DS is 20-mil thick, features additives to produce a water vapor permeance of 0.18 perms, and is listed by cUPC® and evaluated by ICC-ES
Configure Options Add to
Project
Dealer
Locator
Product
Table

Product successfully added to Project List

You can now access your Project List or stay on this page

Go to Project List Continue browsing

Uppsss...

Sorry, something went wrong. Please try again later.

Continue browsing
Share
Schluter<sup class='regsign'>®</sup>-KERDI & KERDI-DS

Schluter®-KERDI & KERDI-DS

Bonded waterproofing and vapor-retardant membranes
Schluter®-KERDI & KERDI-DS
Schluter®-KERDI & KERDI-DS
Schluter®-KERDI & KERDI-DS
Schluter®-KERDI & KERDI-DS
Schluter®-KERDI & KERDI-DS
Schluter®-KERDI & KERDI-DS
Schluter®-KERDI & KERDI-DS

Product type

Next

Schluter®-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. It is made of soft polyethylene, which is covered on both sides with a special fleece webbing to anchor the membrane in the thin-set mortar. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. Tiles can be installed directly on KERDI using the thin-bed method. Other trowel-applied covering materials, such as plaster, can also be used.

1. The substrate must be clean, even, and load bearing. The thin-set mortar used for bonding KERDI must be appropriate for the substrate, and it must penetrate and engage the KERDI fleece. Generally, an unmodified thin-set mortar is used. Cut KERDI to size prior to application.

2. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notched trowel or the KERDI-TROWEL, which features a 1/8" x 1/8" (3 x 3 mm) square-notched design (Note the open time of the mortar). Press KERDI fully into the bond coat. Work the KERDI into the mortar by applying pressure to the membrane with the flat side of the trowel (held at an angle) in smooth, diagonal sweeps. Air bubbles must be avoided.

3. Seams can be constructed by overlapping the edges of the KERDI 2" (5 cm) using unmodified thin-set mortar, or by abutting the edges and covering the joint with KERDI-BAND using an unmodified thin-set mortar.

4. For inside and outside corners, adhere pre-formed KERDI-KERECK-F corners. For floor/wall connections, use KERDI-BAND. Install KERDI-SEAL-PS pipe seals at showerhead, body sprays, etc. and KERDI-SEAL-MV at the mixing valve. As an alternative to KERDISEAL- PS/-MV, KERDI-FIX or other suitable sealant can be used to seal pipe protrusions and protect moisturesensitive solid backing panels at the mixing valve.

5. Connections to fixed building elements can be achieved by using KERDI, KERDI-BAND, or KERDI-FLEX in conjunction with KERDI-FIX, suitable trowel-applied waterproofing materials (such as urethane or similar), that require atmospheric moisture to cure, or other suitable sealing compounds.

6. KERDI shall be separated at existing expansion, structural, and flexible edge joints. Cover the joints with KERDI-FLEX. To allow for greater movement, the center section of the KERDI-FLEX can be tucked into the cavity of the expansion joint prior to bonding.

7. Once the entire membrane—with seams, corners, and connections—has been completely bonded, and therefore waterproofed, the covering may be applied.

Note: Water testing of the assembly
Prior to setting tile, wait 24 hours to allow for final set of the mortar before testing to ensure waterproof performance of the assembly at seams and connections.

8. For tile installations using the thin-bed method, apply unmodified thin-set mortar directly to the exposed KERDI surface and install the tiles, ensuring full coverage. For acid-resistant coverings, use an epoxy adhesive to set and grout the tile.

Connection to Schluter®-KERDI-DRAIN KERDI-DRAIN is a floor drain specifically designed to allow connections to KERDI or other bonded waterproof membranes, typically in shower applications. When adhering KERDI to KERDI-DRAIN, the membrane must be held back to the step in the fleeced bonding flange. Apply unmodified thin-set mortar to the bonding flange using a 1/4" x 3/16" (6 x 5 mm) V-notched trowel or the KERDI-TROWEL, which features a 1/8" x 1/8" (3 x 3 mm) square-notched design. Firmly press KERDI into the mortar with the flat side of the trowel to ensure 100% coverage and a watertight seal. When using the stainless steel KERDI-DRAIN bonding flange, KERDI is adhered to the flange with KERDI-FIX. The flange must be clean and free of grease or other contaminants prior to KERDI-FIX application.

Relevant industry standard guidelines for floor drains with integrated bonding flange include method B422 in the Tile Council of North America’s (TCNA) Handbook for Ceramic, Glass and Stone Tile Installation and Method 326DR in the Terrazzo, Tile and Marble Association of Canada (TTMAC) Specification Guide 09300 Tile Installation Manual. Please contact Schluter®-Systems for the Schluter®-Shower System installation video and Floor Drains Technical Data Sheet.

Notes: 1) For complete installation guidelines and warranty criteria for KERDI in showers, steam showers, and bathtub surrounds, please contact Schluter®-Systems for a copy of the Schluter®-Shower System Installation Handbook (USA: 800-472- 4588; Canada: 800-667-8746), or download it from our website at www. schluter.com.

2) Various configurations of the KERDI-DRAIN are listed by ICC-ES (Report No. PMG-1204), UPC® (IGC 195), CSA (B79), and NSF (as a special engineered product meeting applicable requirements of ASME A112.6.3). For copies of the above listings, please contact Schluter®-Systems at 800-472-4588 (USA) or 800-667- 8746 (Canada) or by e-mail at info@schluter.com.

FAQ

Architectural Material

CAD drawings

Specify our products using Arcat Logo

Learn about this product