Schluter-KERDI is a flexible waterproofing membrane bonded in sheets which also serves as a vapor barrier, in addition to having a certain crack-bridging capacity. KERDI is composed of a central layer of modified polyethylene (PEVA) covered on both sides allowing it to be anchored in the adhesive cement. KERDI was designed for use with ceramic or natural stone coverings. The tiles stick directly to the KERDI membrane using the thin layer method. Other materials that can be applied with a trowel, such as plaster, can also be placed there. KERDI membranes have been evaluated under the standard test for the emission of volatile organic chemical compounds from indoor sources in an environmental enclosure, version 1.1. (Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers), in accordance with California State Standard 01350; and they were found to be compliant. California Standard 01350 is also listed in many “green” building standards and several environmental rating systems. Installation: 1. The substrate must be clean, level and capable of supporting loads. The thin-set mortar used to bond KERDI must be suitable for the substrate and must anchor mechanically in the non-woven felt of the membrane. Generally, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified mortar is used. Cut the KERDI membrane to size before installation. 2. Apply the 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 square teeth 1/8" x 1/8" (3 mm x 3 mm) - Note the opening time of the mortar. Press the KERDI membrane into the mortar by applying gentle diagonal pressure using the flat side of the trowel (hold it at an angle), making sure to avoid air pockets forming. 3. The connections are made by overlapping 2" (5 cm) of the edges of the KERDI membrane or by applying a KERDI-BAND sealing strip with Schluter-SET, Schluter-ALL-SET, Schluter -FAST-SET, or unmodified thin-set mortar on membrane joints placed end to end 4. In interior and exterior corners, glue preformed corners. KERDI-KERECK-F For floor/wall transitions, use KERDI-BAND sealants to shower heads, body sprays, etc., and KERDI-SEAL-MV sealant to valves. You can also use KERDI-FIX adhesive or another sealant suitable for pipe penetrations to protect moisture-sensitive panels. connections to fixed elements are made using KERDI, KERDI-BAND or KERDI-FLEX, in conjunction with KERDI-FIX or waterproof materials applied with a trowel (urethane or similar products), which harden with humidity ambient, 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 greater movement, the central portion of KERDI-FLEX can be bent and inserted into the expansion joint cavity before bonding. 7. Once the membrane, as well as the connections, corners and junctions are completely made and therefore waterproof, the assembly is ready to tile. Note: Leak test of the assembly Wait 24 hours for the mortar to dry before carrying out the leak test of the assembly at the fittings and junctions. 8. When tiling using the thin-set method, apply Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified mortar directly to the exposed face 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 related to KERDI products in showers, steam showers and bath surrounds, as well as KERDI-DS in steam showers, please download the product manual installation of the Schluter shower system or watch the installation videos below.
- Polyethylene waterproofing membrane and vapor barrier in sheets
- Avoid water infiltration which could cause mold
- Composed of a central layer of modified polyethylene (PEVA)
- Covered on both sides with non-woven felt which allows anchoring in the adhesive cement
- Ideal for waterproofing wall and floor surfaces to be tiled
- Features a thickness of 8 mil, which ensures uniform thickness of the assembly
- The 6' 7” (2 meter) wide roll covers a wall surface from floor to standard shower head height, reducing the number of connections and speeding up installation
