Polymer Screed

The screed floor is the top layer that forms a level surface for final floor coverings such as resin flooring, linoleum or wood flooring. It is durable and designed to withstand the impact of heavy footfall. The compact mix of sharp sand and cement also creates an insulating effect, ideal for use with underfloor heating systems.

Traditional cementitious floor polymer screed are poured as liquids and spread over surfaces to harden and cure. Depending on the type of screed and thickness, it can take from a day to a few days before it is rendered usable, ready to receive floor coatings or insulation.

Exploring Polymer Screed: Properties and Uses

When laying traditional floor screed, the correct sand-to-cement ratio is crucial to achieve a high strength. In order to obtain the required sand-to-cement ratio, it is necessary to use a forced action mixer to ensure that the sand is evenly dispersed and mixed with a low water content. In many cases, a 3:1 sand: cement mix is specified by technical guidance, which results in a very sticky and difficult-to-work-with screed that dries too quickly and can cause delamination.

Tarmac SBR Polymer Levelling Screed uses an admixture that is capable of reducing water requirements by up to 25% due to its powerful deflocculating and dispersing effects. This allows a much thinner screed to be laid than would otherwise be possible, providing improved performance for both concrete floors and wet areas. It also reduces cracking, shrinkage, and permeability.

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