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Curbs and Ramps

Curbs and Ramps

Product information

Available in several options for shower entry designs where transitions are required, wedi curbs and ramps can be installed with wedi Fundo shower bases, as well as conventional mortar bed systems. Waterproof and versatile, wedi Curbs and Ramps may be tiled before any glass doors, panels or glass block is installed and can carry weight of up to 480 lbs./ft. Epoxy glue is recommended instead of screw fasteners when installing shower door tracks.

wedi Full Foam Curbs combine it all in one element when compared to traditional methods of 2’ x 4’ wood assembly, lath, mud and waterproofing. They come presloped so water runs back into the shower.

wedi Curb Overs are designed to water-proof over existing 2’ x 4’ wood constructions. A conventional PVC pan liner is sandwiched inside between the 2’ x 4’ and the wedi Curb Over. The wedi Curb Over will provide additional water-proofing and square corners for a perfect tile job. No fasteners should penetrate the curb except on the vertical outside of the shower. Attach with thinset mortar only. Please install curb over in accordance with the TCNA Handbook detail.

The wedi Shower Ramp is used to create curbless showers without recessing the shower base into the subfloor. The ramp provides a 1”slope over a 12” length and meets ADA requirements. For ADA compliant installation, please ensure the lower edge of the ramp is installed against a ¼” tile underlayment on the flat bathroom floor to create a slope 1:12 inches. The ramp should not be tiled with tiles smaller than 4” x 4” when wheelchairs are used in this shower.

Technical properties curbs and ramps


Curbs and ramps Base Material XPS/ Extruded Polystyrene Foam Core covered with fiberglass mesh fully embedded in a cement based resin coating
Thermal Conductivity (75°F (25°C) - ASTM C518) 0.23 Bbtu in/hr F
Tensile Strength (ASTM C297) 65 PSI
Shear Strength (Under conditions required in ANSI A118.10-1999) 28 day Shear Strength: 95 psi
84 day Shear Strength: 100 psi
100 day Shear Strength: 98 psi
Waterproofness; ASTM D4068 / ANSI A118.10-1999 Passed
Capillarity 0
R-Value 75°F (25°) - ASTM C518
4.3hr ft. 2 F/Btu/in (R Value for 1” wedi = 4.3)
Flexural Strength (ASTM C947) 627 psi
Robinson Floor Test (ASTM C627) Heavy duty commercial use, passed
Fastener Pull Through (ASTM C473) Wet 131.8 lb./Dry 196.2 lb.
Temperature Limits -58 / +175° F
Freeze & Thaw (ASTM C666 - 25 Cycles) No disintegration/change
Waterproofness of Assembly (ASTM E331) Passed, wedi Fundo Kit assembly (complete sytsem)
Fungus / Bacteria Resistance (ASTM G21) Passed, No Growth
Accelerated Aging (AC 71 - 25 Cycles) No disintegration
UL 1715 (Fire Test of interior Finish Material) Passed, flame spread <10
Linear Variation (ASTM D 1037 (ICC –EG 159)) Passed, less than 0.07%
Surface Burning Characteristics (ASTM E84-16) Classification A:
Flame Spread Index (FSI): 20
Smoke Developed Index (SDI): 70
Floor and Trench Drain Compliance (ASME A112.18.2) Passed, Compliant (ICC PMG 1189)

Product sizes

Order no. Designation Length x width x thickness
US3000008 wedi Curb Over (square edges) 5" x 5' x 4 1/2"
US3000010 wedi Curb Over (square edges) 5" x 8' x 4 1/2"
US3000011 wedi Curb Full Foam (square edges) 5" x 3' x 4 1/2"
074319002 wedi Curb Full Foam (square edges) 5" x 5' x 4 1/2"
074319001 wedi Curb Full Foam (square edges) 5" x 8' x 4 1/2"
074319007 wedi Curb Full Foam "LEAN" (square edges) 2" x 5' x 3 1/2"
074319008 wedi Curb Full Foam "LEAN" (square edges) 2" x 8' x 3 1/2"
073736517 wedi Shower Ramp (ADA compliant) 12" x 5' sloped 1 1/2" to 1/"

Areas of use curbs and ramps

  • New Construction of Residential/Commercial use buildings
  • Renovation in Residential/Commercial use buildings
  • For barrier free or curbed installations
  • For customized or standard tiled showers
  • Over wooden or concrete substructures

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