Self-levelling concrete is often used to smooth uneven floors before installing final floor coverings. However, it is not suitable for every type of flooring problem. Applying it in the wrong situation can cause cracks, weak areas or floor finish failures.
Where large height adjustments are needed
Levelling compounds are designed for relatively thin applications. If the floor needs significant build-up or large corrections, using self-levelling compound alone is not recommended. Traditional sand and cement screed or liquid screed is usually a better option for deeper layers.
Where the base floor is unstable
Self-levelling materials require a solid base to bond properly. They should not be used on:
- damaged or moving concrete
- surfaces contaminated with oils or adhesives
- loose paint or coatings
- dusty or crumbling substrates
Any instability in the base floor will transfer into the levelling layer.
Where moisture is present
Excess moisture can prevent the levelling compound from curing properly. This can lead to surface failure, debonding or blistering.
Where heavy loads are expected
Self-levelling concrete is generally not intended as a structural floor. Garages, workshops and commercial spaces with heavy loads usually require stronger screed systems.
Where installation is rushed
Although some levelling compounds dry quickly, proper preparation and curing are essential for long term performance.
Why choose Floor Screeding Surrey?
Floor Screeding Surrey provides experienced screed installation services across Surrey with practical advice and reliable results.