Specialist Floor Screeding

Polymer Modified Floor Screeding

Thin section specialist screeds which can be laid at a minimum of 6mm are based on a site batched sand/cement modified polymer (SBR) screed applied in the traditional manner. Important points to observe are when considering the suitability of this type of application:
• substrate preparation and assessment
• priming
• mix design and mix components
• mixing
• laying
• curing

Self-Smoothing Pumped floor Screeds
Self-smoothing pumpable screeds and toppings are supplied as a free flowing cement based dry powder which requires a known quantity of clean water to produce a self-smoothing mix ready to pump or pour on to a prepared, sealed and primed surface. ApplicationProcess:
• substrate preparation and assessment
• priming
• mixing
• laying
• curing

Testing and Assessment
Once the floor has been prepared it must be tested to ensure that what is left behind is strong, sound and suitable to restrain the topping. A floor topping laid on to a weak substrate will crack and curl and debond, probably tearing the substrate up with it as it does so. A topping laid on to a substrate contaminated with grease or oil will not bond. For a thin topping to work successfully it must bond to the substrate concrete, Recommendations for preparation are given in BS 8204 Part 3:1994 which will confirm the suitability of the substrate giving maximum mechanical results from the topping.

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