Floor Screed Quantities

Enter your dimensions in the panel provided to calculate the estimated quantities required for your floor screed. NB: Some assumptions have had to be made to keep this form simple).

Dimensions

  Area 1 Area 2 Area 3 Area 4 Area 5 Area 6
Length in Metres
Width in Metres
Thickness in Millimetres

Volumes

Area 1 Area 2 Area 3 Area 4 Area 5 Area 6
  Total in m3

Densities

Sand 1.27 t/m3  
Cement 1.7 t/m3  

Mix 1 to 4

  Cement Sand  
m3 Bags  
Kg (inc contingency)  

Materials

  Cement Sand  
25 Kg Bags (inc. contingency) Bags  
Plasticiser at 300ml/50kg Litres  

This can only ever be a rough approximation due to differing geographical material and labour costs.

Screed prices for this calculator are averaged out between 25mm and 75mm thicknesses, which will give a slight bias either side of the mean price.

Floor screeds

An in-situ flooring of cement mortar laid to an accurate flat surface by screeding, or by self-levelling.

Common types are:

Ready-Mixed sand & cement floor screeds are an ideal screed for flooring applications. It can be used as ground floor slabs (floating foundations), used on suspended floors, as a topping to lightweight screeds based on perlite or other lightweight aggregates and can also be used as a floating construction over insulation to give acoustic or thermal properties.

Properties:

  • Retarded in order to remain workable for 8-12 hours
  • Consistent quality is guaranteed
  • Better cement dispersion gives greater and more uniform compressive strength throughout the floor area
  • Pre-mixed provides consistent quality materials and accurate proportioning

Fibre screeds have been developed to meet the increasing demand for factory-mixed sand & cement screeds incorporating an even dispersal of polypropylene fibres. Suitable fibres introduced in the mix can provide cohesion and help control cracking caused by stress.

Properties:

  • Minimum early shrinkage or cracking
  • Improved strength and flexural fatigue resistance
  • Can eliminate the use for wire mesh
  • Improved toughness
  • Easy to place, compact and overcomes many practical problems when used as an alternative to steel crack controls
  • Better impact and abrasion resistance

Self levelling screeds based on alpha hemihydrate calcium sulphate are ready to use and have advantages over semi-dry floor screeds, however they are not for the DIY market. They are less labour intensive and up to ten times the area can be laid with one gang compared with traditional semi-dry screeds. Also shrinkage and curling is very unlikely to occur. They can also be laid thinner than conventional semi-dry floor screeds.

Properties:

  • May be lightly trafficked after 1 to 2 days, depending on drying conditions
  • Care should be taken to avoid excessive water loss in the first 24 hours
  • If windows or external doors are not installed, temporary provision must be made with polythene or similar. Direct sun must also be avoided during early life
  • Abrasion & impact resistance are good when compared with traditional sand & cement floor screeds. However, screeds should not be treated as wearing surfaces and care should be taken to protect against excessive impact