Should the quote use area, length or a lump sum?
The unit should match the work. Walls and floors may use area, edges may use length, and isolated work may be priced per item or as a lump sum. State the measurement and calculation method. A combined price still needs included work, exclusions and change conditions.
Can preparation and tiling share one price?
Yes. The quote or matching schedule should still identify included removal, levelling, rendering, adhesives, installation, grout and edges. A combined total does not remove the need for a clear scope. Confirm an unstated item rather than assuming it will be omitted.
What if I buy the tiles myself?
Agree dimensions, thickness and quantities, plus delivery timing, waste, handling, breakage, shortages, returns and top-up orders. Ask the installer to confirm the method suitable for the selected tiles and whether cutting, adhesive and handling costs remain within the quote.
Is waterproofing the only bathroom item to check?
Also clarify preparation, drainage direction, falls checks, drains, thresholds, wall/floor interfaces, equipment finishes, grout and testing, with responsible parties. This page does not prescribe a universal gradient or specification. Appropriate professionals need to confirm requirements for the actual site.
How do I spot work that has not been explained?
Trace protection, removal, waste, substrate repairs, preparation, handling, layout, tiling, cuts, edges, grout, cleaning and acceptance against the quote. Mark anything you cannot find as unconfirmed. Ask which item includes it, or request separate pricing and responsibility.
Can SII judge the price or installation quality?
SII assesses documents. It does not provide market-price appraisals, site measurements or workmanship assessments, and does not rate contractors. LEVEL 1–5 describes Document Maturity only—not workmanship, contractor ability or a guarantee of no project risk.