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Topflow Screed A

Verified by manufacturer 6 months ago

Screed A Steeldeck

Tarmac Variant:
Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

Free flowing, anhydrite self compacting floor screed.

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Application

  • Suitable for a wide range of applications. Its high thermal conductivity and minimum thickness make it suitable for use with underfloor heating (fully encapsulates heating pipes/ cables).
  • Free from protein and it doesn’t harbour potentially harmful bacteria making it suitable for hospitals and care homes.
  • Not suitable as a wearing surface itself, or for external or permanently wet areas such as swimming pool surrounds and cannot be laid to falls.

Description

Topflow Screed A is manufactured with a synthetic anhydrite binder in place of cement and is pump applied due to its fluid consistency. It is easier to install, covering areas of up to 2000 m² per day.


Features and benefits:

  • Manufactured to BS EN 13813:2002, with a recycled source of gypsum (calcium sulfate) rather than cement. It has a free-flowing fluid consistency and is applied by pump.
  • Floors are suitable for foot traffic within 24–48 hours, while drying takes 40 days, or sooner with force drying (available after only seven days).
  • Lower carbon footprint than traditional cementitious screeds.
  • Suitable for use with low energy underfloor heating.
  • Any type of floor finish can be applied to the screed.
  • Maintenance of fluidity for two hours.
  • The screed is produced using Gyvlon binder which is manufactured from an industrial by-prod­uct (average 36% recycled content).
  • Water demand: 13–18% b.w.
  • Flow range: 230–280 mm.
  • Volite Organic Compound (VOC) free and 100% recyclable.


Screed thickness:

  • Bonded: Minimum: 25 mm.
  • Unbonded over a solid base: Nominal: 35 mm. Minimum: 30 mm.
  • Floating over thermal/ sound insulation: Minimum: 40 mm.
  • Cover over conduits/ heating pipes: Nominal: 30 mm, Maximum: 80 mm.


Topflow Screed A Steeldeck:

  • Designed specifically to be used with the Lewis Deck dovetail sheeting, for use with timber, metal web or steel joists in masonry, timber or lightweight steel structures.
  • Suitable for ground, separating or mezzanine floor constructions.
  • Increased productivity and improved loading compared to floating floor treatments.


Topflow Screed A Sky

  • Designed for use in high rise buildings above ten storeys.
  • Specially formulated to reduce moisture loss to pump lines and inline segregation.


Topflow Screed A Excelio

  • Designed for use with underfloor heating systems and where higher than usual loadings are expected.
  • Suitable for both domestic and commercial applications as a floating screed.


Topflow Screed A XTR:

  • Designed for use with underfloor heating systems and where higher than usual loadings are expected.
  • Suitable for both domestic and commercial applications as a floating screed.


Topflow Screed A Soundbar:

  • Designed specifically for use over timber joints both in masonry and timber framed designs.
  • Suitable for both commercial and residential projects where improved acoustic, loading and durability are required.
  • Improved loading compared to timber batten floors.


Topflow Screed A Thermio +:

  • Designed for use with underfloor heating systems and where higher than usual loadings are expected.
  • Suitable for both domestic and commercial applications as a floating screed.

General information

Color

White

Guidance for specification option:

Off-white.

Finish

Smooth

Material

Calcium sulphate

Guidance for specification option:

Gypsum with anhydrite binder.

Shape

Formless

Manufacturer guidance

Formless.

Uniclass

Pr_35_31_06_72 Ready-mixed self-smoothing calcium sulfate screedsPrimary

CAWS

M13/120 Proprietary self smoothing levelling screeds

Specification data - Ready-mixed self-smoothing calcium sulfate screeds

Form

Ready mixed.

Mix

Gypsum (calcium sulfate) with anhydrite binder.

Appearance

Off-white fluid mortar.

Water

Demand, 13–18% b.w.

pH

>10.

Density

2200 kg/m³ (wet), 2000 kg/m³ (dry).

Compressive strength - 28 days

To BS EN 13813, C25.

Flexural strength

To BS EN 13813, F4.

Thermal expansion

0.012 mm/mK (minimum).

Drying time

40 days.

Guidance for specification option:

Or sooner with force drying (available after only seven days).

Surface finish

To BS 8204, SR2.

Fire resistance

To BS 476-4, Non-combustible.

Sustainability data

Material

Calcium sulphate

Guidance for specification option:

Gypsum with anhydrite binder.

Embodied carbon

A1-A3 (production stage) as defined in BS EN 15804

60.29 kg CO₂ eq/m³

Self declared

Recyclability

98%

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

36 %

Third party certifications

BBA Agrément Certificate

BBA Agrément Certificate

BBA certificate 16-5301 Anhydrite Screeds

BBA Agrément Certificate

BBA Agrément Certificate

BBA certificate 16-5301 Thermio+ Anhydrite Screeds

Literature

Topflow Screed A Free-flowing flooring screed

Topflow Screed A Free-flowing flooring screed

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Topflow Screed A Thermio

Topflow Screed A Thermio