Using a subfloor is absolutely necessary when laying laminate (with the exception of laminate with attached subfloor). A subfloor is not only needed to eliminate unevenness and level the floor (<2mm). Use of the correct subfloor largely determines the comfort and quietness of the laid laminate. In general terms we can say that:
- if we want to reduce the walking noise in the room where the laminate is laid (= reflection sound) we need solid/heavy material because this mass will absorb the noise.
- If we want to reduce the walking noise that reaches persons living below (= transmission sound) we need light springy material because air is a good noise insulator.
- Some subfloors offer a compromise in reducing both reflection and transmission sound.
For more information: subfloors