Learning the Difference Between Thinset & Self-leveling Cement
When it comes to floor installation, self-leveling cement and thinset are two commonly used materials. Both materials are designed with a similar purpose but you need to know which one is most appropriate to use. That is to say, the distinct properties of each material make them suited to different types of jobs. In this article, we explain the difference between self-leveling cement and thinset.
Overview
Self-leveling cement is a mixture of cement, sand and additives which allow it to level out by itself with little intervention. This type of cement is typically used on large surfaces like concrete slabs or areas that are not level. On the other hand, thinset is a type of adhesive which is made up of cement, sand, and a polymer which strengthens its bonding ability. Thinset is typically used for smaller areas that are more level. This brings us to the first of four primary differences between thinset and self-leveling cement.
Consistency
Self-leveling cement is thinner than thinset and more fluid which allows it to flow and level itself out. However, it does not have the ability to hold flooring in place. Typically flooring will be floated or glued down with an adhesive on top of the dried cement. Thinset has a thicker consistency that allows it to adhere to surfaces and hold flooring in place.
Floor Coverings
The number one consideration of which type of cement to use hinges on the type of floor covering that is being installed. Flooring that is flexible such as vinyl, laminate, and wood (engineered and solid), or more prone to exposing unevenness. In this situation it is important to achieve the most level floor possible with a self-leveling cement. Tile, ceramic, stone, or other material however, are rigid and will bridge small imperfections in your subfloor. For this application you would use a thinset that will bond your tile to the subfloor.
Application
While self-leveling cement is poured onto the subfloor and seeks its own level, it is still necessary to spread or agitate it with a squeegee or a spiked roller. Thinset takes more time to apply since it is thicker and is spread with a notched trowel which creates ridges. Installers typically use a laser line level as a guide when spreading. Thinset can be spread in one layer, but more often is spread on both the subfloor and the underside of the tile.
Cost
Self-leveling cement is usually more expensive than thinset. While thinset is less expensive and is applied at the same time as the flooring, self-leveling cement needs time to dry before any flooring can be placed on top.
Floor Heating
Both self-leveling cement and thinset are compatible with electric in floor heating systems. For instance, Thermotile cables or mats can be easily embedded into either thinset or self-leveling cement. You might also consider this type of in floor heating system because it’s durable, effective, easy to install and surprisingly inexpensive.
Final Thoughts
Self-leveling cement and thinset serve a different purpose and they have different properties and applications. While self-leveling cement is better for creating a level surface for flexible flooring, thinset is perfect for bonding tile to a subfloor. Either way, choosing the right type of cement is critically important for any floor installation. To learn more about our ThermoTile floor heating system that is designed to for embedment in cement, read the “Top 3 Tile Floor Heat Systems” article found in our Resources Center. You can also contact us through our website or call (800) 308-8057 and speak to one of our floor heating specialists.
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