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Weber Weberfloor Flex Flexible Fibre Reinforced Floor Screed 25kg

by Weber

Brand Weber

For Internal Use

Low Dust Technology

5 - 50mm Depth

1-2 Hours Set Time

25kg: 5L Mixing Ratio

Tile After 2 Hours

Coverage: 1.5m² @ 10mm Thickness

Bag Size: 25kg

Product Code Price Quantity

£20.98 INC VAT

£17.48 EX VAT

Work out how much you need

Using the calculator below, you can work out how much material you will need to get the job done. Please either enter your required area m2 or the width and length.

This is a rough guide calculation provided in good faith, actual usage may vary, please allow for wastage when placing your order. Warm Floor Store Ltd can't be held responsible for any under ordering.


Weberfloor Flex is a self-smoothing floor levelling compound — often incorrectly referred to as a self-levelling screed or self-levelling floor compound — which can be tiled onto and is an easy screed for applying onto floor substrates subject to some movement, such as wood or underfloor heating. 

Flowable liquid floor screed suitable for applying up to a depth of 5-50mm onto:
- Floors with underfloor heating or under-tile warming.
- Cement.
- Concrete slabs.
- Pre-cast elements.
- Wooden flooring.
- Existing ceramic tiles.
- Existing rigid plastic tiles.
- Floating floors (e.g. insulation board).
- Bitumen residue* (* Best practice is to remove all bitumen prior to application).

Features & Benefits:
- Extra flexible levelling screed for substrates subject to movement or expansion.
- A high-performance alternative to a latex self-levelling compound.
- Low Dust Technology™ reduces the amount of dust expelled during the mixing process.
- Suitable for use as an under-tile warming and underfloor heating screed.
- Quick drying screed — can take light foot traffic or be tiled onto after 1-2hrs.
- Coverage of 1.5m² per 25kg bag, when applied at 10mm thickness.

Things To Consider:
- Do not use if floors are permanently damp or have rising dampness on friable or unstable floors in industrial areas.
- Not suitable for exterior use.
- When stored unopened in a cool, dry place at temperatures above 5°C, shelf life is 12 months from the date of manufacture.


Application temperature: +5°C to +30°C
Minimum substrate strength: 1N/mm²
Minimum thickness (under tile warming): >3mm over the heating wires
Minimum thickness (underfloor heating): >15mm over the heating pipes
Minimum thickness (over slip membrane, solid substrate): 20mm
Minimum thickness (floating floor i.e. insulation board): 25mm (with Weberfloor 4945 fibre mesh)
Minimum thickness: (over wood) 10mm
Maximum thickness: 50mm
Water demand: 5 litres/25kg (20%)
Compressive Strength: C 25
Flexural Strength: F 5
Approx. material consumption: 1.7kg/m²/mm
Hardening time before light foot traffic: 1-2 hours**
Drying time before tiling: 1-2 hours**
Drying time before covering with carpet, plastic or wood: 24 hours at 5mm thick**
Working Time (pot life): 20 minutes
Storage & Shelf-Life: When stored unopened in a cool, dry place at temperatures above 5°C, shelf life is 12 months from the date of manufacture.