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wedi PreLine

The wedi building panel PreLine is a fully prepared building board element for easy installation of hot water heating systems.

wedi PreLine
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wedi PreLine

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"Fully prepared building board element for easy installation of hot water heating systems."

Product information

The wedi building panel PreLine is a fully prepared building board element for easy installation of hot water heating systems. Factory integrated recesses allow for quick and safe installation of water pipes whilst strong insulation properties of the material itself prevent heat escaping to the ground thus promote a balanced heat distribution across the entire space.

Adhesion of the wedi PreLine elements to the screed floor and backfilling of the pipe ducts is done very simply with the appropriate tile adhesive (recommendation: thinset mortar). It truly is the perfect element for quick and waterproof implementation of underfloor heating systems.

Technical data wedi building board PreLine


wedi Building Panel Material Composition 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
076400257 wedi PreLine Hydronic Floor Warming Panels 48 4/5 in. x 23 3/5 in. x 1 1/4 in.
(1240 x 600 x 30 mm)

Area of application wedi PreLine

The wedi building panel PreLine is a fully prepared building board element for easy installation of hot water heating systems. Factory integrated recesses allow for quick and safe installation of water pipes whilst strong insulation properties of the material itself prevent heat escaping to the ground thus promote a balanced heat distribution across the entire space. Adhesion of the wedi PreLine elements to the screed floor and backfilling of the pipe ducts is done very simply with the appropriate tile adhesive (recommendation: thinset mortar). It truly is the perfect element for quick and waterproof implementation of underfloor heating systems.

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Impressions of wedi PreLine

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At a glance

Innovations 2020 3.39 MB Shower & Spa Systems Solutions – Canada (English/French) 6.95 MB Technical Handbook 8.12 MB
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