SMET LiteFlo® Lightweight Flowing Floor Screed


Our unique German-made, factory produced, pumpable, high-quality LiteFlo® Alpha Hemihydrate screed based on calcium sulphate.

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.

Related Downloads

icon-pdf  TDS SMET LiteFlo® Lightweight Flowing Screed

icon-pdf  Aftercare SMET LiteFlo® Lightweight Flowing Screed

icon-pdf  SMET Floor Screeds and Compounds Product Selector

NBSplus National Building Specification Clause

Benefits of SMET LiteFlo® Lightweight Flowing Floor Screed

• Lightweight – high yield, 43kg per m2 @ 40mm
• Ideal for application in high-rise buildings & over timber suspended floors
• 30% weight reduction compared to normal CA screed
• Smooth Laitance Free Finish
• Pump applied
• Under Floor Heating – Full Encapsulation
• CE Marked
• EN 13813: 2002

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 site in convenient 27 kg pre-mixed bags or in bulk site silos.

Check out a short video on-site at the Tower in London 2015 – the mixing set up and equipment used: