Tile · 9 min read

How to Prep for a Tile Floor Installation

Flatness, layout lines, thinset choice, and dry-fitting before you mix mortar.

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Prep checklist

Install backer board or membrane; flatness within 1/8 inch per 10 ft for large tile
Snap chalk lines from room center — balance cut tiles at walls
Dry-lay a row without mortar to preview cuts
Have correct thinset (modified vs unmodified) for substrate and tile type
Mix thinset to peanut butter consistency — slake 10 minutes, remix

Layout strategy

Centered grid looks formal; start from main entry for fewer small cuts in the sightline. Hide narrow cut tiles under cabinets if kitchen tile stops at toe kick.

Frequently asked questions

How long before I can walk on new tile?

Light foot traffic often 24 hours; grout after thinset cures per bag — usually 24–48 hours. Wait 72 hours before heavy loads.

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Flooring Box Calculator provides estimates for planning only — not professional flooring installation advice. Verify quantities and products with your retailer. Read disclaimer