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ARDEX-FLEX FS

Tile grout · ARDEX

A 10 kg bag of ARDEX-FLEX FS covers up to 33 m², by ARDEX UK's own figure: “thus one 10kg bag of ARDEX- FLEX FS will grout up to 33m² of tiling”. ARDEX UK's other figures are in the table below.

Source: ARDEX UK, ARDEX-FLEX FS product data sheet, read 12 October 2026.

Plan wall tiles for a roomPlan floor tiles for a room

Coverage
up to 33 m² per 10 kgARDEX UK's figure
Bag sizes
2.5 kg, 5 kg, 10 kg3 sizes in the catalogue
For
Walls and floorsin the maker's words

Where to buy it

The shops' own searches for it. BuildBatch sells nothing and compares no prices.

Search the shops for ARDEX-FLEX FS

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Coverage

ARDEX UK gives 2 figures for ARDEX-FLEX FS, each for the conditions in its own words. Each is the maker's own, with its source below.

ARDEX-FLEX FS: the maker's coverage figures
FigureThe maker's words
up to 33 m² per 10 kg bag“thus one 10kg bag of ARDEX- FLEX FS will grout up to 33m² of tiling”ARDEX UK, ARDEX-FLEX FS product data sheet, read 12 October 2026
0.3 kg a square metre“Example Tiles 150mm x 150mm x 5mm; joints of 3mm:300 x 5 x 3 x 1.5 ÷ 150 ÷ 150 = 0.3kg/m²”ARDEX UK, ARDEX-FLEX FS product data sheet, read 12 October 2026

What one bag covers at the maker's rate

Arithmetic on the maker's figure: the bag's kilograms divided by a rate a square metre, or times an area a kilogram, with nothing added for waste.

ARDEX-FLEX FS: the area one bag covers at each of the maker's rates
The maker's rateA 2.5 kg bagA 5 kg bagA 10 kg bag
0.3 kg/m²“Example Tiles 150mm x 150mm x 5mm; joints of 3mm:300 x 5 x 3 x 1.5 ÷ 150 ÷ 150 = 0.3kg/m²”8.3 m²16.7 m²33.3 m²

When the figure runs short

The conditions the maker names
Each figure is for the notch, bed, tile or joint the maker names beside it. An uneven surface, a larger notch or buttering the backs of the tiles takes more.
Waste
None of these figures adds anything for what is left in the bucket or spilt.

Bag sizes

Questions about ARDEX-FLEX FS

How much does a 10 kg bag of ARDEX-FLEX FS cover?

ARDEX UK states up to 33 m² (“thus one 10kg bag of ARDEX- FLEX FS will grout up to 33m² of tiling”), in its ARDEX-FLEX FS product data sheet, read 12 October 2026. Nothing is added for waste.

How much ARDEX-FLEX FS per square metre?

ARDEX UK states 0.3 kg a square metre (“Example Tiles 150mm x 150mm x 5mm; joints of 3mm:300 x 5 x 3 x 1.5 ÷ 150 ÷ 150 = 0.3kg/m²”).

What sizes does ARDEX-FLEX FS come in?

The catalogue lists 2.5 kg, 5 kg and 10 kg bags. A shop may not stock every size.

Other tile grouts

In alphabetical order, with each maker's own figures. A maker measures its coverage its own way, so the figures are not a test of one product against another. Every product under tile grout.

More from ARDEX

4 of the 17 other ARDEX products in the catalogue, by name. All ARDEX products.

Where the figures come from

This page was written with AI tools from the maker's own documents; it is not yet checked by a tradesperson. The figures are the maker's, and a maker's figure is their best case: follow the bag's own instructions.