How to Finish walls with Stucco

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For a three-coat system, mix the stucco to a trowel-able consistency and apply it with a square trowel, working from the bottom up. Press the stucco into the lath, and then screed and smooth the surface for a uniform thickness. When the coat hardens enough to hold a finger impression, scratch ys"-deep horizontal grooves into the surface with a raking tool.

After moist-curing the scratch coat for 24 to 48 hours, mix stucco for the brown coat (or base coat for two-coat system) and apply it in a %"-thick layer. Use a straight board or a darby to screed the surface so it’s flat and even. When the stucco has lost its sheen, float it with a wood float to roughen the surface. Moist-cure the coat for 48 hours as directed.

 

Variation: For a one-coat application, mix a fiber-reinforced one-coat stucco and apply it in a / to %"-thick layer, working from the bottom up and forcing it in to completely embed the lath. Screed the surface flat with a darby or board. When the surface loses its sheen, finish trowel or texture the surface as desired. Cure the coat as directed. Seal all joints around building elements with polyurethane sealant.

Mix the finish coat and apply it in a 1/s"-thick (minimum) layer, working from the bottom up. Complete large sections or entire walls at one time for color consistency. Texture the surface as desired. Cure the coat as directed. Seal all joints around building elements with polyurethane sealant.

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