Gypsol XS

We modelled Gypsol XS, a high strength screeding solution, for use in projects that experience superior strengths and higher loadings.

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LKAB Minerals

LKAB Minerals

Head Office

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Where to use Gypsol XS?

Our Gypsol XS screed is formulated especially for projects where higher loadings and wear and tear are more likely. You should think of commercial projects such as:

  • theatres
  • data storage facilities
  • hospital operating facilities

The screed is suitable for the encapsulation of an underfloor heating system, either electric or warm water. You can use it to produce a smooth, flat and level floor to form the subbase for subsequent floor coverings for internal floors.

Our customers are specially trained screeders who pump your floor into place by using specialised equipment. Gypsol XS provides a high strength cost-effective and environmentally friendly alternative to cement-based screeds.

You can also combine this screed with the unique Gypsol Rapide fast-drying additive to produce drying times of just 14 days at 50mm deep in the correct drying conditions.

Gypsol portfolio

Construction projects that require a screed floor have different requirements. To supply the market with the best solution for each floor, we have developed a wide range of screed solutions. You can find more details on the individual product pages:

  1. Rapide; A self-compacting, self-smoothing, fast-drying floor screed
  2. Classic; Our general-purpose screeding system. The most commonly used material in our range.
  3. HTC; Gypsol HTC (High Thermal Conductivity) for use with underfloor heating and cooling systems.
  4. TS-15; An ultra-thin screed for bonded and un-bonded applications at a minimum depth of 15mm.
  5. TS-20; A thin screed suitable for bonded and un-bonded applications down to a 20mm minimum depth.
  6. XS; Extra strength material for use in heavy-duty applications, where loading is likely to be higher than normal.
  7. TimBRE; Specially formulated and tested for use in timber frame and over timber supported floors including acoustic conditions.
  8. Sureflo; Pre-blended product supplied in 25kg bags for mixing on site. Ideal where minimal quantities are required, or access for ready-mix lorries is not possible.
  9. Summit; Particularly fit for screeds pumped over very long distances or high buildings of 10 stories and above.
  10. Modular; Designed for use in modular construction to allow early movement of units, also for a lightweight steel frame and Lewis Decking.
  11. Rustique; a unique fast track floor, providing a rustic or architectural finish.
  12. Diamond; a unique and innovative “micro concrete” providing a polished floor.
Gypsol XS floor screed installation in car park

Gypsol XS product details

LKAB Minerals manufactures Gypsol XS to exacting standards in quality-assured ready-mix facilities throughout the UK. We also have this product available in specific locations from volumetric on-site mixing systems. We make our screed from high-quality Gypsol anhydrite binder, specially selected sands and clean water. Therefore this offers our users a simple and effective floor screeding solution for all building types where they use a subsequent floor covering. Finally, you can use the material with or without underfloor heating, and it is suitable for use in acoustic designs.

Gypsol XS benefits

Using Gypsol XS will benefit your screed floor because of:

  • Rapid application
  • Assured high strength
    • Minimum Ca-C30 – F5
  • Low shrinkage
    • Reduced risk of plastic cracking
  • Thin Screed sections
    • 35mm Floating domestic
    • 40mm floating commercial
    • 30mm unbonded
    • 25mm bonded
    • 25mm cover to underfloor heating pipes
  • Fast drying
    • 28 days natural drying*
    • 13 days forced drying*
    • Can be used with Rapide Additive to offer 14 days drying

*Independently tested and based on 50mm depth at 20˚C and 60% RH. Upon request, we have the full test data available for you.

  • Rapid commissioning of underfloor heating
    • Underfloor heating can be commissioned and run after just seven days
  • No reinforcement nor fibres required
  • No curing agents required
  • Low Carbon Footprint
    • Just 26.26kg per tonne of material manufactured saving up to 94% CO2 compared to a cement-based screed.
  • Fully self-compacting and high density
    • Offers 80kg/m2 density at just 40mm
  • Rapid return to service of work areas
    • Foot traffic after just 48 hours
    • Full loading after only seven days

Packaging Gypsol XS

Our Gypsol XS screed is available from all readymix and volumetric screed producers who stock Gypsol Binder.

Gypsol XS - Frequently Asked Questions

  • What is the minimal Gypsol XS screed thickness my floor needs?


    Technically Gypsol XS screed can be used either with or without insulation to the following minimum depths

    • 40mm Floating Commercial
    • 35mm Floating Domestic
    • 30mm Unbonded
    • 25mm Bonded
    • 25mm cover to underfloor heating pipes

    However, these depths may require adjustment based on the type of sub-base you have. For more information for your specific project, call our technical and specifications team.

  • How soon can I lay my floor coverings on top of the Gypsol XS screed?


    Gypsol XS screed dries naturally in around 28 days in right drying conditions based on 50mm depth. If you have underfloor heating, you can commission and run this to force dry the screed in which case it will be dry in just 13 days. Gypsol XS screed dries by evaporation of residual moisture into the air above it. It is therefore vital to ensure that you carry out drying in well-ventilated conditions. You must do this to remove the moisture as it evaporates.

    Additionally, you must carry out an appropriate moisture test to confirm the screed is suitably dried before applying floor coverings. As XS off-site construction tends to be a fast track construction solution, it can be challenging to commission underfloor heating if indeed it is even present. You can use our Gypsol Rapide fast-drying additive which allows your Gypsol XS screed to dry at 50mm depth in just 14 days.

  • What loadings can Gypsol XS take?


    The general strength requirements for Gypsol XS mean that it meets a minimum requirement of Ca-C30-F6. This will support a uniformly distributed load of 30kN/m2. As a result, it will readily accept loads such as cars, stud walls, large, heavy crates etc. You should note that while the screed itself will take such loads if you lay it on insulation, this will affect the performance of the floor because the insulation will undergo compression allowing the screed to flex. A good rule of thumb is therefore that where the insulation is to be the same depth or deeper than the screed, then you should use a minimum EPS100. And where the screed is deeper than the insulation a minimum of EPS70 can be suitable. In all cases, the insulation should be rated sufficiently to allow for the loads applied to the floor. Make sure you consult your engineer or insulation manufacturer.