Category: Finishes
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
Tile adhesive is a ready-mixed polymer-modified cementitious mortar spread with a notched trowel to fix tiles. It is classified to EN 12004, and large porcelain formats usually need a C2 class with added flexibility.
Why it matters on a project
The right adhesive prevents hollow and debonding tiles, especially with large formats, external walls and underfloor heating. Choose it for the tile size and location, not the price.
Measurement and pricing
Included in the tiling rate per square metre. Consumption is about 4 to 5 kg per square metre with an 8 to 10 mm trowel, more with large formats and back-buttering.
Worked example
A 60 m² floor at 4.5 kg/m²: adhesive 60 × 4.5 = 270 kg, or 11 bags of 25 kg with a little waste.
Common mistake
Spreading adhesive over a large area and laying tiles after its surface has skinned, so the bond is weak and tiles sound hollow.
Frequently asked questions
What does C2TE on the bag mean?
C2 is an improved cementitious adhesive, T slip resistant on walls, and E extended open time to adjust tiles.
Do I need to back-butter the tile?
For large tiles from 60 x 60 cm upward, buttering both faces is recommended for full coverage.
Related terms
- Porcelain tilesHigh-density, low-absorption ceramic tiles suited to heavy-use floors.
- Tile groutThe material that fills the joints between tiles.
- Floor screedA thin mortar or concrete layer that levels the floor before tiles or parquet.
- Waste allowanceA percentage added to material quantities to cover cutting, damage and site loss.
Read next
- Interior fit-out stages, from site handover to project handover
- Work out quantities with our free calculators: concrete, tiles, paint and plaster. Open the calculators
Does your project need interior design and finishing drawings? Send the drawings or a short description and we reply within one working day.
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