Description
Schluter-KERDI is a flexible, sheet-applied waterproofing membrane that also serves as a vapor barrier and offers some crack-bridging capabilities. KERDI consists of a core layer of modified polyethylene (PEVA) coated on both sides, allowing it to anchor in the mortar. KERDI is designed for use with ceramic or natural stone coverings. Tiles are bonded directly to the KERDI membrane using the thin-bed method. Other trowel-applied materials, such as plaster, can also be installed over it. KERDI membranes have been evaluated and found to comply with the Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers, Version 1.1, in accordance with California Standard 01350. California Standard 01350 is also listed in many green building standards and environmental rating systems. Installation: 1. The substrate must be clean, level, and load-bearing. The thin-set mortar used to adhere KERDI must be suitable for the substrate and mechanically anchor the membrane to the non-woven felt. Typically, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar is used. Cut KERDI to size before installation. 2. Apply the thin-set mortar directly to the substrate using a 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel or the Schluter®-KERDI-TROWEL, which has 1/8" x 1/8" (3 mm x 3 mm) square notches - note the open time of the thin-set mortar. Press the KERDI membrane into the mortar by applying gentle diagonal pressure with the flat side of the trowel (hold it at an angle), making sure to avoid air pockets. 3. Joins are made by overlapping the KERDI membrane edges by 2" (5 cm) or by applying KERDI-BAND with Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar over the joints of butted membranes. 4. At inside and outside corners, adhere preformed KERDI-KERECK-F corners. For floor/wall transitions, use KERDI-BAND. Apply KERDI-SEAL-PS sealants to showerheads, body sprays, etc., and KERDI-SEAL-MV sealant to the mixing valve. KERDI-FIX or another suitable sealant may also be used at pipe penetrations to protect moisture-sensitive panels. 5. Joins to fixed elements are made using of KERDI, KERDI-BAND or KERDI-FLEX, in conjunction with KERDI-FIX or trowel-applied waterproofing materials (urethane or similar products), which cure in ambient humidity, or other sealing compounds. 6. The KERDI membrane must be separated from existing expansion, structural and flexible joints. These joints are covered with KERDI-FLEX. To allow for greater movement, the central part of KERDI-FLEX can be folded and inserted into the expansion joint cavity before bonding. 7. Once the membrane, as well as the seams, corners and joints, are completely completed and therefore waterproof, the assembly is ready for tiling. Note: Leak Testing the Assembly Allow 24 hours for the mortar to dry thoroughly before testing the assembly at the seams and joints. 8. For tiling using the thin-set method, apply Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar directly onto the exposed side of KERDI and set the tiles. For acid-resistant surfaces, use an epoxy adhesive for setting and grouting. For complete installation instructions and warranty information for KERDI in showers, steam showers, and tub surrounds, as well as KERDI-DS in steam showers, please download the Schluter Shower System Installation Manual or watch the installation videos below.
- Polyethylene sheet waterproofing membrane and vapor barrier
- Prevents water infiltration that can lead to mold and mildew
- Consists of a modified polyethylene (PEVA) core layer
- Faced on both sides with a non-woven felt that allows anchoring in the Thin-set mortar
- Ideal for waterproofing wall and floor surfaces to be tiled
- Features an 8 mil thickness, ensuring a uniform thickness throughout the assembly
- The 6' 7" (2 meter) wide roll covers a wall surface from the floor to the standard showerhead height, reducing the number of connections and speeding up installation
