Tile adhesive is sold in bags. Guessing “three bags for the flat” is how leftovers pile up — or how you run out mid-wall.
What the planner actually multiplies
The material list does not glue on net-only field.
- Net area — wall or floor after windows, doors, hatches, and other openings.
- Gross tiled area — that net × (1 + your order allowance). Same gross used for box counts.
- Adhesive — 4.5 kg/m² on that gross, shown as kg and 25 kg bags (estimate).
- Primer — 0.2 L/m² on the same gross.
Layout pattern (diagonal vs straight) changes cuts, not this adhesive rate. Allowance still sits on net after openings — it is not “ignore the windows.”
The 4.5 kg/m² and 0.2 L/m² figures are the planner’s estimate.
Steps
- Build the layout in the tiling planner with real sizes and openings, then set allowance.
- Open the on-screen material list — adhesive and primer sit next to the tile count, on gross.
- Round up to whole bags of the product you will buy.
That stops the mistake of buying without any area math.
For joint filler, see grout calculation.
Next: Grout · Quick start
