How to Mix Brown Coat for Stucco

The brown stucco coat is used to provide architectural detail to stucco facing. The brown stucco coat is mixed after the scratch coat is applied to the exterior of the home or building. Generally, more sand is added to the brown coat than is added to the scratch coat, which gives it its browner appearance. This coat is applied on top of the scratch coat, and the excess is screed, or cleaned off the surface with a straight edge.

Mechanical mixer or mixing stick
Bucket

Instructions

- 1
  Pour the brown stucco mix in a bucket.
- 2
  Add the appropriate amount of water to the stucco. For example, an 80 lb. bag of brown coat requires about 1 3/4 gallons of clean water, or 1 part brown coat to 3 parts water.
- 3
  Mix the brown coat and water by hand with a mixing stick or mechanical mixer until the stucco has reached a lump-free consistency that can be applied with a trowel.
- 4
  Allow the mixture to sit for 15 to 20 minutes, then re-stir it for an additional five minutes. It is now ready to be applied.

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