Underfloor Heating Screed | Heated Floor Screed | UFH

Of course, you also get the benefits with our screed of:

• CE marked
• fully BS 8204-7 compliant installation
• EPD certified screed – certificate available for download on EPD Ireland’s Platform
• Can be installed in a heated floating-floor screed construction, uniquely, with the commissioned underfloor heating system up and running – at 25°C
• virtually no shrinkage
• up to 150m² bay sizes
• applied at rates of up to 500m² per day
• foot traffic in as little as 6 hours
• no sanding – a laitance-free screed surface
• 15 years of tried and tested results poured by ISO 9001:2015 Certified Fast Floor Screed Ltd 
• over 1.5 million m² accurately mixed and poured by our Fast Floor Screed Ltd CE certified state-of-the-art Mobile Screed Factories across our country


Application is extremely fast – applied at 500m² per day and walkable in 6 hours

Südanit 280 Alpha Hemihydrate Screed’s advanced composition means that it reacts quickly with water, providing consistent, reliable drying characteristics and considerably faster drying times, enabling follow-on trades to proceed without delay.  This has the advantage of ensuring your project completes in a timely manner, offering your architect or designer flexibility. For your builder/contractor and floor covering specialist, it offers ease of installation on site.


Click the video below to see how we pour your new level floor with our state-of-the-art Mobile Screed Factory

Fast Floor Screed lays smoothly and provides a superb perfectly flat floor – ready for your floor covering

Our Alpha Hemihydrate Screed’s easy workability means that it mixes and flows smoothly, with none of the inconsistencies that are inherent in synthetic Anhydrite Screeds. Südanit 280 Alpha Hemihydrate Screed is stable and does not segregate, so there is no surface skin formation as there is with Anhydrite.

It means less finishing and fewer joints

Consistent drying and smooth laying mean no finishing before final floor coverings are laid and there’s no need for additional smoothing compounds.

The perfect Screed for use with Underfloor Heating (UFH)

Alpha Hemihydrate Screed can be installed in a heated floating-floor screed construction, uniquely, with the commissioned underfloor heating system up and running @ 25°C!

Fast Floor Screed’s Alpha Hemihydrate screed is particularly suitable for applications over Under Floor Heating (UFH) and cavity floors.  Südanit 280 Alpha Hemihydrate Screed is a liquid self-compacting, self-flowing, self-levelling Screed which flows to fully encapsulate underfloor pipes or wires and reduces the potential for air bubbles/pockets which can have an adverse effect on heat transfer. 


Floor preparation for Screed application over Under Floor Heating – UFH

The correct preparation is essential to achieve the best performance from your UFH system and the final floor finish.  The following is a demonstration of how the floor should be prepared when Screeding with UFH:
Suitable insulation is placed onto the structural floor along with edge insulation, against the perimeter of the walls and columns.

RESULT – This avoids cold bridging and allows the floating floor to expand.

Before placing the underfloor heating pipes, a plastic membrane is installed directly onto the insulation boards and returned up the walls.

RESULT – This ensures no leakage of the screed and allows the screed to dry consistently throughout.

Under floor heating pipes are placed and fixed to the insulation boards using clips and/or rails. Fixings need to be no more than 500mm apart and extra fixings are required for bends/returns.

RESULT – Ensures pipes do not float during screed application.

Before screed placement commences, we set adjustable tripod depth gauges set by laser level to the agreed datum, which is usually calculated from your door threshold.  There is no requirement for datum lines on walls.

RESULT – A perfectly flat floor evenly throughout the building.

Smooth and level. Foot traffic can commence after 6-8 hours under normal drying conditions.

RESULT – Provides a perfectly flat floor – ready for your floor covering when fully dry.

Related Downloads

icon-pdf  TDS Sudanit 280 Alpha Hemihydrate Floor Screed
icon-pdf  TDS Sudanit 280 Aftercare and Tiling Info – Fast Floor Screed
icon-pdf  Fast Floor Screed_Info Flyer
icon-pdf  EPD – CASEA Calcium Sulphate Flowing Screed
icon-pdf  FAST FLOOR SCREED UFH Preparation Guide
icon-pdf  TDS Fine Flow_Alpha Hemihydrate Floor Screed_Fast Floor Screed Jul 2019
icon-pdf  TDS SMET_Tiling Onto Calcium Sulphate Floor Screed_System I
icon-pdf  TDS SMET_Tiling Onto Calcium Sulphate Floor Screed_System II
 National Building Specification Clause
BIM Building Information Modelling Object