Description
Overview
Schluter KERDI-DS is a 20-mil sheet waterproofing membrane with lower vapor permeance than standard KERDI. Its polyethylene core and fleece surfaces provide a bonded waterproofing layer beneath tile, while the 0.19-perm rating makes it suited to continuous-use steam rooms and similarly demanding vapor-control applications.
Features
- Uniform sheet thickness provides a defined waterproofing and vapor-control layer.
- Fleece on both faces anchors into thin-set mortar.
- Designed for tiled walls and floors in steam and wet-area assemblies.
What's Included
- One KERDI-DS membrane roll, 3 ft. 3 in. × 98 ft. 5 in. (323 sq. ft.)
Specifications
- Thickness: 20 mil
- Water-vapor permeance: 0.19 perms
- Roll area: 323 sq. ft. (30 m²)
- Construction: High-density polyethylene core with polypropylene fleece
- Listings: See manufacturer documentation for cUPC and ICC-ES evaluation
- Manufacturer part: KERDI-DS
Size and Model Details
- Item No.: KERDI-DS
- Width: 3' 3" – 1 m
- Length: 98' 5" – 30 m
- Area: 323 ft2 – 30 m2
- Thickness: 20 mil
Applications
Specify KERDI-DS for continuous-use steam-room construction where a low-permeance membrane is needed behind the tile.
Plan Your Installation
- Confirm the vapor-control requirements of the steam-room or other specified assembly before choosing KERDI-DS instead of standard KERDI.
- Lay out the 3 ft. 3 in. × 98 ft. 5 in. roll with allowances for overlaps, corners and penetrations.
- Coordinate the membrane, drain and all adjoining waterproofing details as a complete assembly; selecting a low-permeance sheet alone does not complete the enclosure.
Common Planning Questions
How does it differ from standard KERDI?
KERDI-DS is 20 mil thick with a stated 0.19-perm rating, compared with the standard 8-mil sheet.
Does one roll provide 323 sq. ft. of finished coverage?
That is the nominal roll area before cutting and overlap allowances. Calculate the actual layout before ordering.
