What this work covers
Self-levelling compound is an underlayment, not the finished floor. It flows across shallow irregularities before vinyl or SPC is installed. The word self-levelling can be misleading: weak dust, skipped primer, excess water, trapped air, or rushed curing can leave a surface that looks flat but cracks or powders under the final flooring.
When this work is needed
Use it where shallow waves or small level changes would telegraph through thin flooring or prevent rigid boards from sitting evenly. Deep depressions, actively moving cracks, and major falls are not solved by simply pouring more compound; those conditions need their own repair and level design.
Decide before pouring
Measure the actual floor and finished height before choosing the area and quantity.
- Whether the whole floor or only measured problem areas will be treated
- Highest and lowest points, average pour thickness, and required material quantity
- Clearance at thresholds and beneath doors after the new flooring is added
- Product, water ratio, working sequence, and the time the area must remain closed
