Question 1

How many tiles do I need?

Accepted Answer

Divide total area by the coverage of one tile (including grout spacing) and add 10-15% for cuts and waste.

Question 2

How do I account for grout lines?

Accepted Answer

Increase tile area slightly by including grout joint width in the effective coverage.

Question 3

Do I need backer board?

Accepted Answer

Wet areas typically require cement backer or waterproofing per code and manufacturer instructions.

Question 4

What layout reduces waste?

Accepted Answer

Centered layouts with equal edge cuts look balanced; larger tiles can reduce grout lines but may need a flatter substrate.

Question 5

How much thinset and grout do I need?

Accepted Answer

Use manufacturer coverage charts based on trowel size and joint width.

Tile Calculator — Tile & Flooring Materials Calculator