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NBS Source

Topflow Screed C

Verified by manufacturer 11 months ago

Tarmac

Free-flowing cement based screed suitable for most applications including underfloor heating and wet environments.

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0121 787 5001 https://tarmac.com/contact/

Application

Suitable for all residential and commercial floors carrying pedestrian traffic within BS 8204 classification.

Description

Designed to provide a smooth level surface in both commercial and domestic buildings prior to the application of floor finishes, It can be unbonded or floating. Also suitable for use with underfloor heating.


Features and benefits:

  • It is a more conductive medium than sand cement screed and is self-curing and self-compacting.
  • It can be laid thinner than competing sand cement systems without detriment to its performance, so any underfloor heating pipes are closer to the surface (nominal cover to pipes 30 mm).
  • No need for force drying as the product is ready to receive floor coverings within 14–21 days dependent on environment.
  • It can be laid as a floating construction over most types of rigid insulation board or acoustic matting at a minimum thickness of 40 mm.
  • It offers significant programme benefits, as areas of up to 120 m² can easily be installed and finished per hour.
  • It's very low shrinkage values mean you require less construction joints than cement based screeds.
  • The screed can receive foot traffic 48 hours after placement.
  • The product can remain fluid for two hours.
  • Easily achieves SR2 under BS 8204. Not suitable as a wearing surface, or for external areas.
  • Compatible with all floor coverings, and also compatible with all cementitious adhesives and floor levellers.
  • Flow range: 270–280 mm.
  • Fire rating (BS 476-4) non-combustible.

General information

Color

Grey

Finish

Smooth

Material

Cement

Uniclass

Pr_35_31_06_78 Self-smoothing levelling screed mixesPrimary

CAWS

M10/160 Proprietary self smoothing levelling screeds

Specification data - Self-smoothing levelling screed mixes

Appearance

Dark Grey fluid mortar.

Density

2200 kg/m³, 2000 kg/m³.

  • Wet: 2200 kg/m³.
  • Dry: 2000 kg/m³.

Compressive strength - 28 days

25 N/mm².

Flexural strength

Flexural strength at 28 days

4 N/mm².

ThermalConductivity

1.7 W/m·K.

Screed thickness

50 mm.

Unbonded.

35 mm.

Floating over thermal insulation: Residential.

40 mm.

Floating over thermal insulation: Commercial.

30 mm.

Cover to heating pipes.

Type

Screed C Belitex CT16/F2.

Screed C Belitex CT20/F4.

Screed C Belitex CT25/F4.

Drying time

14–21 days, 48 hours.

  • 14–21 days: ready to receive floor coverings.
  • 48 hours: receive foot traffic.

Coverage

120 m²/hour.

Case studies

Cement based floor screed solution for underfloor heating

Cement based floor screed solution for underfloor heating