Is Floor Levelling Required For Installing Floating Floorboards?
Subfloor Levelling With Flooring Underlay – Whilst underlay is necessary for all floating floors, they were never designed to substitute for self-leveling compound or concrete grinding. This is because the underlay will simply follow the shape of the subfloor which is not flat.
Underlayment, or “padding” as it’s often called, is the spongy, closed-cell plastic foam sheet that comes in rolls. It is rolled out between the flooring system and the subfloor.
However, as a general rule of thumb, the subfloor should be flat to within 3mm over a 2-meter radius. If the subfloor is not level, it may be necessary to prepare it before installing the floating floor. This can involve using a leveling compound or self-leveling screed to even out any high or low spots.