SMET LiteFlo® Lightweight Flowing Floor Screed


Our unique German-made, factory-produced, pumpable, superior-quality LiteFlo® Alpha Hemihydrate screed is based on calcium sulphate and selected lightweight aggregates.

LiteFlo® is designed for application at thicknesses of between 20 and 70 mm and is particularly suitable for application over timber suspended floors, timer-frame houses, high-rise buildings and apartment blocks.

Benefits of SMET LiteFlo® Lightweight Flowing Floor Screed

  • Pumpable – first of its kind available.
  • Lightweight – high yield, 43kg per m2 at 40mm thickness.
  • 30% weight-reduction compared to standard calcium sulphate screeds.
  • 70% weight reduction compared to traditional sand and cement.
  • Absolutely ideal for application in high-rise buildings, over timber-suspended floors, timber-frame houses and in new builds and renovations.
  • Smooth laitance-free finish.
  • For application at thicknesses of between 20 and 70mm.
  • Under Floor Heating – full encapsulation.
  • Perfectly level floors – every time.
  • Installed nationwide by Smet Supported Partners.
  • Sustainable – as this calcium Sulphate binder naturally embodies less carbon than a cement-based binder.
  • German made.
  • CE EN 13813: 2002

LiteFlo® is suitable for floors in homes, offices, public buildings, and places exposed to similar loads. LiteFlo® may be applied as a levelling screed directly onto a load-bearing floor, unbonded on a separating barrier (polyethene), as a floating floor and can be used in conjunction with underfloor heating or cavity floors. However, when using LiteFlo® in combination with underfloor heating, it should be noted that LiteFlo® has a low thermal conductivity.

LiteFlo® should be covered with a floor finish such as tiles, linoleum, parquet, cork, or carpet. If a cement-based adhesive or smoothing compound is required the surface of the screed must first be sealed, using an appropriate acrylic primer/sealer.

SMET LiteFlo® is unique, in that it’s the first pumpable lightweight flowing screed available.    It’s made from specially selected aggregates, which makes it 30% lighter than conventional flowing screeds and 70% lighter than sand and cement, meaning less material is required per m2. LiteFlo® complies with EN 13813: 2002, is CE-marked and is available in 27Kg bags or bulk silos. Have a look at the Northern Builder MagazineTop 5 Liquid Screeds Article.  Read about SMET LiteFlo® in the Irish Construction News.

Related Downloads


TDS SMET LiteFlo® Lightweight Flowing Screed


Aftercare SMET LiteFlo® Lightweight Flowing Screed


EPD – LiteFlo® Lightweight Flowing Screed


SMET Floor Screed and Compounds Product Selector


Technical Details for SMET LiteFlo® Lightweight Flowing Floor Screed

Screed Specification CA-C20-F4 as per EN 13813
Maximum Thickness 70mm
Minimum Thickness Bonded: 20mm
Unbonded: 30mm
Domestic: 35mm
Commercial: 40mm
Over Underfloor heating Pipes: 25mm (BS 8204-7)
Use Internal only
Compressive Strength (28 days) ≥ 20.0 N/mm²
Flexural Strength (28 days) ≥ 4.0 N/mm²
Tensile Adhesion > 1.5 N/mm²
Flow Rate 240 – 260mm (slump flow – Hägermann cone)
Hardening Times (Light foot-traffic) After approx. 12 hours; can be partially loaded after approx. 7 days
Hardening Time Final Covering: approx. 2 – 6 weeks dependent on thickness and drying conditions on site
Recommend water demand 8 – 9 l per 27kg bag
Working Life 45 – 60 minutes depending on ambient conditions
Thermal Conductivity (tabular value) λR = 0.40 W/mK
Yield 1.08 kg/mm/m²
Fresh (Wet) Density 1,500 kg/m³
Hardened (Dry) Density 1,300 kg/m³

SMET LiteFlo® is supplied to sites in convenient 27 kg pre-mixed bags or in bulk site silos.

Check out SMET lightweight screed, lightweight flooring systems, and aggregates (void fillers) suitable for any building project.

Check out this wee short video we took on-site at the GWQ Tower in London by Stanmore Ltd – a good demo of the mixing set up and equipment used when using the 27kg bags pumped to high-rise: