How To Lay A Sand And Cement Floor Screed

The screed may be left as finished or floated to produce a smooth surface on which to lay the specified flooring or finish.

How to lay a sand and cement floor screed.

Laying a level floor screed over a large area is difficult and to do so by eye requires years of experience. The slabs are laid on a base of sand mixed with cement. So this is how i make my floor screed a 4 to 1 mix with little water mixing the floor screed slow and not over mixing the sand and cement will keep it at a. 3 sands or 1 portland cement.

Unbonded sand and cement screed minimum thickness. Laying onto a substrate with a separating membrane on the minimums are as follows. A traditional sand and cement screed is normally a 1 4 or a 1 3. Next pour about 1 inch of screed onto the floor and lay down long wooden battens to divide the room into 10 foot wide strips.

Ready mixed sand and cement screeds that are factory mixed and then delivered to site offer additional quality assurance over site mixed screeds and offer a more consistent material. This technique guarantees the slabs long term stability and their vehicle accessibility. Added to that cement type grade of aggregate and the method of storage of screed material influence the mix ratio to a certain extent. 1 tonne of flooring grit or sharp sand mixed at 4 sand to 1 cement will cover approximately 15 square metres of floor when laid at 40mm thick.

Therefore a suitable type of cement shall be selected and sand needs to be free of deleterious materials. Then combine the screed mix with water so it s the consistency of paint. 40mm traditional sand and cement screed. Laying on wet sand with cement.

Once they are leveled fill in the strips one at a time until the entire floor is covered in screed. It also allows to lay the slabs straight on the floor screed avoiding the high costs of the levelling screed arrangements. Mix ratio of sand and cement screed for floor varies based on the intended use of the screed. If the thickness of the floor screed does not exceed 40mm then the recommended mix is 1 portland cement.