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Best practicesTo boost stucco durability, the best an option a designer have the right to make is come specify, and also enforce, ideal curing in the contract documents. Merely referencing standards is no enough, since they conflict and also are not commonly stringent. Requirements can likewise be vague and also do not refer to the active process of adding water come the surface ar to stop it indigenous drying during the specified period. Relying top top the weather problems is not an acceptable curing method.
For example, Northwest wall surface and Ceiling Bureau’s (NWCB’s) Stucco resource Guide only argues curing the first (i.e. Scratch) coat for a minimum the 48 hours. Whereas Texas bureau of Lathing and Plastering’s (TBLP’s) Systems manual does not require moist-curing as soon as the humidity in the wait is over 75 percent. Stucco manufacturers generally call for moist-curing stucco a minimum the 48 hours.
There are two widely accepted methods because that curing stucco: surface-misting (or fogging) and the double-back method.
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Surface-mistingThe best curing method is surface-misting through water. This includes lightly misting the surface ar of every layer that plaster 2 to 4 times daily for 48 to 72 hours after application. The method can be easily modified—but not eliminated—to accommodate the weather conditions as needed. Portland Cement Association’s (PCA’s) Portland Cement Plaster/Stucco Manual suggests it is generally sufficient to fog the surface ar with water in ~ the workday’s beginning and end. The water must be applied as a mist or fog, staying clear of over-saturating the plaster; a hefty stream that water might damage the plaster if sufficient strength has actually not to be developed. Cold water used to hot stucco can additionally cause distress from thermal shock.