20kg bag of Ardex A29 Rapid Hardening Floor Screed — main packshot of the cement-based, rapid-hardening subfloor screed mortar.
A man kneels on a freshly laid screeded floor inside a modern building, using a screed bar to level the surface. A large bag of Ardex A 29 rapid hardening cement and a metal trowel are visible in the foreground.
A construction worker kneels on wet floor screed applying mortar or screed in an indoor room, with a bag of ARDEX A 29 floor hardener in the foreground - underfloor heating pipes on xps foil insulation board protude out of the wet screed.
A man kneels outdoors smoothing wet scrred with a metal screed bar. A large bag of Ardex A 29 sits in the foreground on gravel, with a house and patio doors in the background.
A man kneels on a wet floor installation inside a building, spreading screed over underfloor heating pipes fixed to xps insulation boards. A large grey bag of Ardex A29 cement is visible on the left.
A bag of Ardex A 29 rapid hardening cement sand is shown in the foreground on a construction site, with workers spreading wet screed using tools near a concrete pump truck in the background.
A person in work clothes pours Ardex A29 powder into a blue concrete mixer in a construction setting. A large bag of Ardex A29 is shown in the foreground on a concrete floor.
A bag of Ardex A 29 rapid hardening cement and a bucket and trowel sitting on a freshly laid screed, in a newly renovated room with large windows and wooden ceiling beams, alongside boxes of porcelain tiles.
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20kg bag of Ardex A29 Rapid Hardening Floor Screed — main packshot of the cement-based, rapid-hardening subfloor screed mortar.A man kneels on a freshly laid screeded floor inside a modern building, using a screed bar to level the surface. A large bag of Ardex A 29 rapid hardening cement and a metal trowel are visible in the foreground.A construction worker kneels on wet floor screed applying mortar or screed in an indoor room, with a bag of ARDEX A 29 floor hardener in the foreground - underfloor heating pipes on xps foil insulation board protude out of the wet screed.A man kneels outdoors smoothing wet scrred with a metal screed bar. A large bag of Ardex A 29 sits in the foreground on gravel, with a house and patio doors in the background.A man kneels on a wet floor installation inside a building, spreading screed over underfloor heating pipes fixed to xps insulation boards. A large grey bag of Ardex A29 cement is visible on the left.A bag of Ardex A 29 rapid hardening cement sand is shown in the foreground on a construction site, with workers spreading wet screed using tools near a concrete pump truck in the background.A person in work clothes pours Ardex A29 powder into a blue concrete mixer in a construction setting. A large bag of Ardex A29 is shown in the foreground on a concrete floor.A bag of Ardex A 29 rapid hardening cement and a bucket and trowel sitting on a freshly laid screed, in a newly renovated room with large windows and wooden ceiling beams, alongside boxes of porcelain tiles.

Ardex A29 Rapid Hardening Floor Screed 20kg

Ardex
Price:
£24.99

Description

ARDEX A 29 is a rapid-hardening cement for producing internal and external floor screeds, formulated to get ceramic tiles down in as little as 24 hours on a bonded screed — without compromising on strength. Mixed at a true 1:7 ratio with screeding sand, it suits most normal screeding situations and can be applied as a bonded, unbonded or floating screed.

With up to 90 minutes of working time, there's no need to rush the mix, placing, compaction or trowelling off. Once laid, A 29 hardens fast — walkable in approximately 8 hours — and passes the BRE (ISCR) Screed Test in as little as 24 hours. It's compatible with underfloor heating systems and can be pumped for faster application on larger jobs. Supplied in 20kg bags.

Why tradespeople reach for A 29

  • Walkable in 8 hours — keeps the rest of the job moving without a long standdown
  • 90 minutes of working time — plenty of time to mix, place, compact and trowel off properly
  • Passes the BRE Screed Test in 24 hours — independently verified soundness, fast
  • True 1:7 mix — consistent, reliable performance without over-specifying cement
  • Flexible installation — suitable for bonded, unbonded and floating screed applications
  • Underfloor heating compatible — for use with UFH systems, following the correct curing schedule
  • Pumpable — can be pumped using a proprietary screed pump for faster large-area application

Drying and floorcovering times

A bonded A 29 screed is normally ready for ceramic tiles after 24 hours. Unbonded and floating screeds need 7 days' drying (or a moisture reading below 2% by the Carbide method) before tiling. Natural stone can be fixed after 7 days, and resilient or wood floorcoverings after 7 days, or once a sub-2% moisture reading is confirmed. Times are based on 23°C and 50% relative humidity for screeds up to 50mm thick — low temperatures slow hardening, high temperatures speed it up.

What it's for

Producing bonded, unbonded and floating cement/sand screeds for internal and external floors ahead of ceramic tile, natural stone, resilient and wood floorcoverings — including new-build, refurbishment and fast-track projects. Screeds are not designed as wearing surfaces and should be protected once dry.

Download the ARDEX A29 Technical Datasheet (PDF)