Smoothing compounds are materials used to create a level, even surface on subfloors before laying down flooring materials like LVT. These compounds fill gaps, correct imperfections, and enhance adhesion for the final flooring layer. When preparing a subfloor for installation, choosing the right smoothing compound is essential. Two of the most common types are latex-based and water-based smoothing compounds. While they serve a similar purpose, their composition and performance can differ significantly.
Latex-based smoothing compounds are made by combining Portland cement with a latex polymer additive
Water-based smoothing compounds use water as the primary liquid component and do not contain latex additives. They also often contain fibres to help prevent cracks.
Latex based smoothing compound can be used above water based smoothing compound, but not the other way round. Both latex-based and water-based smoothing compounds have their place in flooring preparation, each with individual benefits and drawbacks.
Before applying the smoothing compound we need to ensure that the surface is solid and dust free. Any loose rubble needs to be removed. The surface is then primed with one of two primers, depending on porosity.
The smoothing compound is mixed to a smooth consistency using an electric paddle mixer. It’s then applied by hand using a trowel to a thickness of around 3.5mm.