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Soft or Powdery Underlayment

Problem

Cause

Cure

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Moisture penetration followed by freeze/ thaw cycles.

Protect the underlayment installation from freeze/thaw conditions. Consult manufac turer for recommended environmental use conditions and product limitations.

Underlayment not designed for exposure to water or freeze-thaw environment.

Underlayment used as a wear surface.

Always use a product designed for the intended function.

Underlayment is soft, powdery or wearing off the surface.

Photo courtesy of NTCA Five-Star Member Lippert Flooring and Tile NTCA Five-Star Project of the Year Large Commercial Achievement of Excellence

NTCA Reference Manual | 2024 / 2025

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Chapter 3 | Backerboards and Underlayments