Performance characteristics of underlays
There are a number of performance characteristics for underlays under MMF flooring in relation to specific requirements:
1. Performance in relation to the substrate/construction
PC: punctual conformability
SD: water vapor diffusion resistance
R: thermal resistance
2. Performance in relation to the use of the floor covering
DL: dynamic load
CS and CC: compressive strength and compressive creep
3. Performance based on acoustics
IS: impact sound reduction
RWS: radiated walking sound