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Identify the floor build-up
Establish what must be retained beneath the tiles. Drawings, inspection and the condition of the floor help determine the removal method; the visible tile size alone is not enough.
Protect heating and services
Tell the contractor about underfloor heating and concealed pipes. Agree how the system will be assessed before and after work, and what happens if hidden damage or an unsuitable base is found.
Price the full preparation
Compare removal, waste handling, adhesive removal and levelling as separate items. Access, adhesion, thickness and the required finish influence the scope and may outweigh small differences in floor area.
Prepare for installation
The exposed base should be assessed for strength, flatness and moisture before new flooring is fitted. Agree thresholds and finished floor levels with the next trade to avoid an incomplete handover.