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Can you use self-levelling compound on asphalt flooring?

Asphalt is smooth and non-porous so you cannot apply the normal self-levelling compound that is mixed with water. It will not adhere correctly start to crack and eventually flake off over time.

You can apply Ardex NA which is a two-part latex based self-levelling compound. It always comes with a bottle of latex and a bag of self-levelling cement and can be used directly on asphalt with no preparation other than sweeping and hoovering up the floor, but this is just good practice anyway.

What is self levelling compound?

Self-levelling compound is also known as a floor screed or floor levelling mix. It is a thin layer of a cement-based mixture that is applied to subfloors in order to level out any bumps.

The mix is applied in a thin layer to subfloors such as concrete and floorboards, you use it before laying another floor, such as tile, above it.

It is called a self-levelling compound as it, in theory, self-levels. What this means is that you don’t have to worry about getting the mix perfectly level. It should flow across the floor, and correct any errors.

While this does generally work, there are limits. It doesn’t flow like water so will not perfectly level over a large area and may require a bit of help from you.

Why use self-levelling compound?

You use a self-levelling compound to turn a bumpy, un-even subfloor into a perfectly smooth surface. This is great when you are fitting a solid floor such as tile or wood.

Your floor wont be able to hide the bumps and just sit on them when you fit a rigid floor. Tiles will crack and break and a wood floor will bounce and move. Whereas a flooring like carpet will happily sit on an uneven base.