Why is waterproofing its own line?
It's the part that fails expensively and the part that cheap jobs skip. A separate line shows it was done and what it cost.
Tile · Free invoice sample
The general shape of a tile invoice after the work is done. Substrate, waterproofing, setting, and grout kept separate so the customer sees what was inside the wall before the tile went on.
Common practice
Tile is judged by the grout lines. The invoice should show the waterproofing behind them.
It's the part that fails expensively and the part that cheap jobs skip. A separate line shows it was done and what it cost.
Tile is usually customer-supplied; setting materials aren't. Splitting them avoids confusion about what was bought.
Large-format tile has inherent tolerance. Stating it heads off the flashlight-at-an-angle complaint.
Before you send it
Tile is unlicensed in most states but sits inside plumbing and building code in wet areas.
General information, not legal, tax, or licensing advice. Requirements differ by state, county, and city and change over time. Confirm with your state licensing board and the local authority having jurisdiction before relying on any of this.
Estimator notes
Internally yes; show categories on the invoice.
Note it, get approval before setting, and state that customer-supplied tile carries no material warranty.
Only if listed. Most residential tile is customer-selected.
Bill them as a clearly labeled additional line with the customer's approval noted.