Grout research and data
Reference data computed from geometry and published standards rather than copied from marketing charts. Each dataset explains its method so you can reproduce the numbers.
Grout coverage chart
Pounds, bags and gallons of grout per 100 sq ft for common tile sizes and joint widths.
Grout joint area analysis
Original analysis of how much of a tiled surface is grout, and why it changes maintenance by 50x or more.
Grout type property matrix
Sanded, unsanded, high-performance, epoxy, urethane, premixed and furan grouts compared on 14 properties.
Grout failure diagnostic chart
Every common grout failure in one chart, with a confirming test and the fix.
Explore other guides
Grout Basics
What grout is, what it does, what it cannot do, how long it lasts and how to handle it safely.
Grout Science
The chemistry and physics behind curing, shrinkage, color, porosity and strength.
Grout Types
Every grout family, the standards behind them and how to choose the right one.
Comparisons
Head-to-head matchups with side-by-side tables and a clear recommendation.
Joint Width and Layout
How wide and deep grout joints should be, and where grout must stop for movement joints.
Grout by Tile Type
Grout choice, joint width and pitfalls for each tile material.
Grout by Location
Where the tile lives changes the right grout: wet, hot, outdoor, submerged or commercial.
How to Grout
Mixing, floating, sponging, haze removal and curing, done the way pros do it.
Grout Problems
Symptom-first diagnosis: what you see, what causes it and how to fix it.
Repair and Regrouting
Patch, remove and regrout correctly, and know when the problem is below the grout.
Cleaning and Stains
Safe cleaning methods, the right chemistry for each soil, and stain-by-stain fixes.
Sealing Grout
Which grouts need sealing, which sealer to use, how to apply it and how to test it.
Grout Tools
Calculators and interactive tools for planning, buying and troubleshooting grout.