Plan tiles. Cuts, grout, glue, heights.
Centred: equal cuts both edges · Balanced: shifts setout to avoid sliver cuts (<⅓ tile) · Full: starts with a full tile at chosen edge · Diagonal: auto-bumps waste to 15% min (more cut tiles at every edge).
Grout calc uses joint width × tile thickness × total joint length, +15% wastage. Adhesive based on coverage rate per notch (typical: 6mm ≈ 4 m²/20kg, 10mm ≈ 2.5 m²/20kg, 20mm ≈ 1.5 m²/20kg) +10%.
Adhesive bed = compressed thickness after fixing (typically 3–5mm for floor, 6–10mm for LFT). Heating mat commonly 3–5mm electric, 12–20mm hydronic in screed. Target FFL = desired finished floor level above existing — entered to check fit.