Grout depends on joint size and tile thickness, so small mosaics use far more than big format tile.
How it works
Joint length per sq ft × joint width × depth gives volume. Grout is estimated at 0.065 lb per cubic inch, plus 10%.
Before you order
- Clean excess from joints before it hardens; hazing is far easier to remove early.
- Use sanded grout for wider joints and unsanded for narrow joints and easily scratched tile.
- Mix only what you can use before it starts to stiffen.
Common questions
Why do small tiles take so much grout?
Small tile has far more joint length per square foot. A 2 in mosaic can need several times the grout of a 12 in tile.
Do I have to fill the full joint depth?
Fill the joint as fully as the tile allows. Grout should reach at least two-thirds of the tile thickness.