ARDEX A 38

Ultra Rapid Drying Cement for Internal & External Screeds

ARDEX A 38 produces ultra-rapid drying floor screeds which can be walked on after just 3 hours and floorcoverings installed in as little as 4 hours, regardless of thickness. Use ARDEX A 38 for bonded, unbonded and floating screeds in internal and external locations, including wet areas such as swimming pools.

  • Walk on after 3 hours
  • Receives ceramic and natural stone tiles directly after only 4 hours
  • Install carpet, wood and vinyl floorcoverings after 48 hours
  • Passes BRE Screed (ISCR) Testing after 6 hours
  • After just one day, achieves the acceptable minimum compressive and tensile bending strengths attained by an ordinary cement screed after 28 days
  • For internal and external use, including wet and submerged areas

Unit Size Available: 25kg

Coverage: Approximately 3.2m2 at 25mm thick per 25kg unit

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Tile adhesive
Notch size / bed thickness
Area to be covered

How much will I need?

The number of kg required = kg
The number of units required for your project = units.

The calculation above indicates the approximate number of units required, and does not allow for site conditions or wastage

Select product
Depth mm
Area to be covered
Select product
Depth mm
Area to be covered
Select product
Depth mm
Area to be covered

The calculator below will tell you how large an area a unit of the selected grout will cover, based on the dimensions that you supply. Simply enter the required figures in the boxes below and view the results in the results box.

Tile Dimensions Grout
Length (mm)
Breadth (mm)
(check joint width)
Joint Dimensions
Width (mm)
Depth (mm)

All tile and joint dimensions are rounded up to the nearest number (no decimal points).


Results - based on figures and product chosen above.
Result kg per square metre. Therefore:
a kg unit will cover -

How many unit(s) will I need?

Enter the area of your project here: m²   
The number of kg unit(s) required for your project =

The calculation above indicates the approximate number of units required, and does not allow for site conditions or wastage