How to Mix Thinset

If you want to install tile, you first need to mix the mortar or thinset. According to the "In Home Projects" website, it is important to create the correct consistency of thinset because if it's too thick, it will be hard to spread. If it is too thin, it "will not hold its shape properly, and the extra water will make the thinset weak." A weak thinset can lead to cracked grout and buckled tile.

Step 1

Add 2 inches of cold water to a 5-gallon bucket.

Step 2

Add half a bag of dry thinset mix and use the drill set to medium or low to stir.

Step 3

Add more water and continue mixing until the substance is smooth and has no lumps.

Step 4

Rest the thinset for ten minutes to allow the chemicals to begin working and the mixture to thicken.

Step 5

Remix the thinset to prepare it for use.


  • Don't use hot water; it will accelerate the mortar.
  • Be sure to mix on low, or you will add too much air to the thinset.
  • Never add water to the thinset to soften it.

About the Author

Stacy D. Cooper received her Bachelor of Arts degree from Indiana University with an emphasis in writing and literature. She is fascinated with books, reads constantly and is the owner and publisher of a book review blog and website. She currently writes for online content providers while raising her two daughters.