weber.floorflex is a high-performance, fibre-modified, cement-based, self-smoothing, self-levelling, rapid-drying floor screed. It is used for correcting surface irregularities on difficult surfaces, including wood, in interior situations.
High-performance, fibre-modified, self-smoothing, self-levelling renovation screed (up to 50 mm)
For levelling:Cement screeds, concrete slabs and pre-cast elements Floors with under-floor heating or under-tile warming Wooden flooring (plywood and particle board panels) Existing ceramic and rigid plastic tiles Floating floors Suitable for covering with:Tiling Flexible floor coverings Parquet flooring Certain floor paints In situations that will be very humid, such as bathrooms, weber.sys protec tanking system may be applied over weber.floor flex.
▲ Excellent levelling properties ▲ Can built up to 50 mm ▲ Rapid drying (light foot-traffic after 3 hours)
▲ Improved bond to difficult substrates ▲ Flexibility to absorb limited movement, e.g. under-floor heating and wood
▲ Fibre modified for increased resilience
Switch off any under-floor heating systems at least 24 hours before application.
Substrates should be completely dry, hard, rigid and clean. Remove any traces of paint, plaster or laitance or other unsound materials. Thoroughly remove all traces of dust by vacuuming. Fill any large deep holes and allow to dry. Localised holes, up to a total thickness of 50 mm can be filled with weber.floor flex.
Timber should be rigid and strong enough to support the expected load with minimum deflection, normally at least 18 mm thick of a flooring grade and ventilated beneath. Screw wood panels to joists at least every 200 – 300 mm to prevent movement and ensure that every board edge is adequately supported by its adjacent board or joists and noggins. Ensure that all joints and cavities in the substrate are protected to prevent leakage.
Priming with weber PR360 is recommended to improve adhesion, reduce air bubbles, improve the flow of the screed and prevent de-watering.
Do not mix if the temperature is outside of the range +5°C to +30°C.
Thoroughly mix with 5.25 litres of water per 25 kg bag using a slow speed electric mixer (500 rpm) for at least two minutes until a fluid, homogenous paste is obtained.
Allow to stand for 2 minutes and use within approximately 20 minutes. At higher temperatures this time will be reduced.
Pour the mix onto the floor and spread evenly with a steel trowel, spatula or spiked roller. Do not apply at thicknesses above 50 mm. The product will self-smooth and most trowel marks will disappear.
The minimum application thickness for wooden substrates is 10 mm.
At 15 – 20°C weber.floor flex will have set sufficiently hard in 2 – 4 hours to withstand light foot traffic. Laying of the floor covering can then commence within 24 hours. At lower temperatures and at thicknesses over 5 mm, these times are extended.
weber.floor flex is not intended as a wearing surface so the final finishing layer should be applied as soon as possible after drying has completed. If it is to be left for prolonged periods of time the surface should be suitably protected.
Allow for suitable expansion or control joints in screeds or slabs, by following them through the new topping.
Weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.Technical helplineTel: (01525) 722137Fax: (01525) 718988Download Spec SheetEnquiry