Screed Flooring Thickness

Non structural floor screeds shall be adequate for the location and intended use and provide a suitable background for floor finishes.

Screed flooring thickness.

This is the most common and depending upon the site conditions most popular type of screed used. 3 sands or 1 portland cement. Semi dry floor screed what is it and what thickness is best. Issues to be taken into account include.

Screed is usually applied on top of the concrete slab and is most commonly used as a finishing layer on internal floors or to level the floor prior to final floor coverings carpet tiles natural stone linoleum wood flooring resin coatings etc. A minimum thickness of 65mm is possible provided the thermal insulation boards. The optimum thickness of a sand and cement bonded screed is 25 40mm an unbonded screed should have a minimum thickness of 50mm whilst a floating screed should have a thickness greater than 65mm for lightly loaded floors and 75mm for more heavily loaded floors. It may be applied onto either a solid in situ concrete ground floor slab or onto a precast concrete floor unit.

Floor screed thickness find out the minimum and maxium depths for different screed products on various types of floor build up. Therefore to allow for deviations in the finished levels the specified design thickness should be a minimum of 75mm. However bs 8204 1 emphasises that there is a high risk of screed curling with unbonded and floating levelling screeds. There are many proprietary screeds on the market and information about these can be obtained from the manufacturer.

This traditional screed mix is made up from sand and cement at a 1 3 5 ratio and is then spread onto the floor and allowed to solidify around the ufh pipes or cables. A layer thickness of 50 mm with the tile as a finishing coating will increase this value up to 130 140 kg. The screed thickness should not be less than 50mm. Therefore cement sand screed is used for leveling of floors in buildings where design of the supporting slab is designed for a payload of 300 to 400 kg m.

3 coarse aggregate 10 mm maximum aggregate size should be considered if the floor screed thickness is greater than 40mm.