How to Mix Thin Set Mortar for a Tile Shower

Shower faucet pouring water into a shower stall with light grey tiles.
  • 1 hours
  • Beginner
  • 25-250
What You'll Need
5-gallon bucket
Thinset mortar
Paddle mixer
Dust mask

Thinset mortar is made of cement. It is a vital part of any tile job. It bonds tiles securely to floors and walls. Mixing thinset mortar is easier than mixing cake batter. By following these instructions, you can master the art of mixing thinset mortar.

Step 1 - Add Water

Check the manufacturer’s instructions to determine the amount of water needed. Pour 25% of the required amount into the bottom of the 5-gallon bucket.

Step 2 - Add Paddle

Attach the paddle to the paddle mixer and place it in the bucket of water.

Step 3 - Add Thin Set Mortar

Put on your dust mask and open the bag of thinset. Carefully pour 25% of the thinset into the bucket. Brace the bucket between your legs to stabilize it. Slowly start mixing the mortar from the bottom of the bucket. Add the remainder of the water and thinset to the bucket and continue mixing until the thin set has a consistency like peanut butter. Using an up-and-down motion, mix the thin set for 5 minutes.

Step 4 - Let It Sit

Allow the thinset to sit for 5-10 minutes. Then mix it again for another 5 minutes. Now that your thinset mortar is thoroughly mixed, you can start tiling.