Product information
Internally waterproof and pre-sloped shower shower base with factory integrated and waterproofed point drain connection for fast track installations that eliminate the many different steps and products involved in traditional mortar bed or semi pre-fabricated sheet – or liquid membrane system installations .
Fundo Primo can be customized in the field and cut to size fitting shower stalls smaller than the nominal size of the product. Fundo Primo is available in select sizes featuring centered and off-centered drain options.
The bases come with even perimeter thickness for easy recessing into subfloor construction while curbs can be used with Fundo Primo as well. Fundo Primo can be directly tiled over upon installation and there is no limitation to the size of tile or type of tile and cement based tile setting materials selected.
Fundo Primo is available with select drain cover options. Due to the precise slope fields of the Fundo Primo, large or small format tile may be used. Within each slope field the tile will be fully supported over an even yet sloped surface. Where slope fields meet, grout lines should be designed when using tile larger than 100 x 100 mm as these should not span across two slope fields.
- 100% waterproof due to its extruded polystyrene ( closed cell) foam core
- 100% mold and mildew proof due to the product ‘s natural composition.
- Precisely pre-sloped and ready to tile surface made of reinforcing fiberglass mesh embedded in a heavy duty cement resin coating performing as a strong tile backing and strong enough surface to work on during system installation and prior to tiling
- High insulating properties due to its extruded polystyrene core giving tile or stone finish surfaces a warmer touch.
- Extremely lightweight due to its rigid foam core benefitting installations over older structures and handling on construction sites.
- Easy and clean to cut to size using a circular saw or handsaw.
- Installation is extremely fast and safe due to the one piece shower base application. The product or installation requires no curing times allowing for a continuous installation process.
- Drain covers are height adjustable for a perfect finish with the tile selected
- No limitation to use of tile sizes or the type of tile
- No limitation to use of cement based thinset mortars and grouts. Product works perfectly with polyurethane or epoxy based grouts.
Proven
Functional
Diverse
Expandable
Technical Details
wedi Fundo shower elements can be cut to size on site, the geometry of the elements should be maintained however. wedi fundo elements can only be combined with the wedi Fundo drains.
| Technical properties - Fundo Primo | |
|---|---|
| Fundo Primo Shower Base Material | XPS/ Extruded Polystyrene Foam Core covered with fiberglass mesh fully embedded in a cement based resin coating |
| Surface Burning Characteristics; ASTM E84-04 and UL 1715 | Passed |
| Tensile Strength ( Thinset Mortar to wedi Coating to Foam); ASTM C297 | 0.45 N/mm² |
| Shear Strength (Thinset Mortar to wedi Coating to Foam); within ANSI 118.10-1999; wet conditions | 0.37 N/mm² |
| Flexural Strength; ASTM C947 | 4.32 N/mm² |
| Waterproofness of Assembled System; IAPMO PS 106-2015 | Passes |
| Drain Assembly Kit, WaterMark | Passes |
| Temperature Exposure Limits | -50 C to + 80 C |
| Long-term compressive strength (50 years) ≤ 2% compression EN 1606 | 0.08 N/mm² |
| Compressive resistance or compressive strength at 10% compression EN 826 | 0.25 N/mm² |
| Fungus & Bacteria Resistance | No Growth , Passes |
| Robinson Floor Test; ASTM C627 *with 200 x 200 x 6 mm Porcelain Tile | Heavy Duty Commercial Use, Passes |
| R-Value, ASTM C518 | 25mm of wedi foam = 4.3 |
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Usage
- 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

Installation & Application
Planning Walk-in Showers Correctly – wedi Fundo SystemsHere you’ll find a clear overview of how to use the walk-in shower systems from the wedi Fundo series. The content showcases solutions for various subfloors, a wide range of drainage options, and how to meet specific requirements for barrier-free bathrooms.
You can find all information on installation, installation procedures, and suitable applications here:













