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Fundo Primo

Fundo Primo

„Floor-level shower elements for effective use of space.“

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.

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Technical properties - Fundo Primo

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.


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

Product sizes

Order no. Designation Length x width x thickness
073736220 Fundo Primo, square shower element, central drain 1020 × 1020 x 40 mm
073736221 Fundo Primo, rectangular shower element, central drain 1220 × 1020 x 40 mm
073736222 Fundo Primo, square shower element, central drain 1220 × 1220 x 40 mm
073735506 Fundo Primo, rectangular shower element, central drain 914 × 1524 x 40 mm
073735525 Fundo Primo, rectangular shower element, central drain 914 × 1828 x 40 mm
073735509 Fundo Primo, rectangular shower element, central drain 1219 × 1524 x 40 mm
073735508 Fundo Primo, rectangular shower element, central drain 1219 × 1828 x 40 mm
073735518 Fundo Primo, square shower element, central drain 1524 x 1524 × 40 mm
073735519 Fundo Primo, rectangular shower element, central drain 1524 × 1828 × 40 mm
073736230 Fundo Primo, rectangular shower element, offset drain 1820 × 920 × 50 mm

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Areas of use Fundo Primo

  • 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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