Materials for repair

Screeds for the basics of parquet floors are different. There is a cement — sandy screed and polymer -cement waterproofing, also from light concrete and cast asphalt. Cement — sandy has sand, cement and water. Water needs to be taken more than half of the total weight of cement, if there is less water, then the strength of the solution will decrease. You need to take one measuring part of the cement and 3 — 4 parts of the sand. When the mixture was mixed, it must be used within an hour.