SMET LiteFlo® Lightweight Flowing Floor Screed
Our unique German-made, factory-produced, pumpable, high-quality LiteFlo® Alpha Hemihydrate screed is based on calcium sulphate and selected lightweight aggregates.
LiteFlo® Lightweight Flowing Screed is designed for application at thicknesses of between 20 and 90 mm and is particularly suitable for application over timber suspended floors and in high-rise buildings and apartment blocks. LiteFlo® complies with EN 13813: 2002. and is CE-marked.
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. The lightweight flowing screed can be placed in reduced thicknesses, and naturally has substantially lower embodied carbon emissions than a sand & cement screed.
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
National Building Specification Clause
Benefits of SMET LiteFlo® Lightweight Flowing Floor Screed
Technical Details for SMET LiteFlo® Lightweight Flowing Floor Screed
| Screed Specification EN 13813: 2002 | |
| Maximum Thickness | 90mm |
| Minimum Thickness |
Bonded: 20mm Unbonded: 30mm Domestic: 35mm Commercial: 40mm Over Underfloor heating Pipes: 25mm (BS 8204-7) |
| Use (External Use) | No |
| Use (Internal Use) | Yes |
| Compressive Strength (28 days) | ≥ 20.0 N/mm² |
| Flexural Strength (28 days) | ≥ 4.0 N/mm² |
| Tensile Adhesion | > 1.5 N/mm² |
| Yield | 1.08 kg/mm/m² |
| Flow Rate | 240 – 260mm (slump flow – Hägermann cone) |
| Hardening Time (light foot traffic) | after approx.12 hours, can be partially loaded after approx. 7 days |
| Hardening Time (final covering) | Final Covering: 2 – 6 weeks dependent on thickness and drying conditions |
| Recommend water content | 9 – 10 L water per 27kg bag |
| Working Life | 45 – 60 minutes depending on ambient conditions |
| Reaction To Fire | A1 Non-Combustible |
| Thermal Conductivity (tabular value) | λR = 0.40 W/mK |
| Yield | 1.08 kg/mm/m² |
| Fresh (Wet) Density | 1.5 kg/l |
| Hardened Dry Density | 1.3 kg/m³ |
| pH Value | > 7.0 |
SMET LiteFlo® is supplied to sites in convenient 27 kg pre-mixed bags or in bulk site silos.
Check out a short video on-site at the GWQ Tower in London 2015 – the mixing set up and equipment used:
