What three coats are used when stucco is applied?
What is Three Coat Stucco? Three coat is the original stucco process, consisting of paper and wire, a scratch coat, a brown coat, and a finish, or “top” coat.
How long should you wait between coats of stucco?
Cure Time: The scratch coat should be allowed to moist cure for a period of 3-5 days. This allows the cement to become hard enough to gain most of it’s strength before the brown coat is applied.
How thick should stucco be applied?
The correct thickness is then 5/8 inch. Two-coat applications are only for use over solid plaster bases without metal lath. For unit masonry, that thickness is ½ inch. For cast-in-place or precast concrete, the thickness for two-coat work is 3/8 inch.
Is stucco applied in layers?
Layers. Stucco is normally applied in two or three layers. Three layers is the traditional method.
What is the brown coat in stucco?
The brown coat is applied over the scratch coat to prepare the plaster base for the finish coat application. The three coats consist of two base coats and one finish coat. The first base coat is called a scratch coat, the second is called a brown coat. In two coat work, there is a single base coat and a finish coat.
How long does it take for stucco to cure before you can paint it?
A: Four to six weeks is about right. But you can also buy a kit at the hardware store and test the moisture levels in the stucco to be sure it’s thoroughly dry. When you do paint, put a good primer on first; then apply the paint. That fresh paint will help your stucco shed water.
Does stucco need a finish coat?
Stucco application typically requires three coats. The initial “scratch coat” provides adhesion to the building. The “brown coat”, which comes second, is responsible for creating an even surface. Finally, the “finish coat” determines the stucco’s outward appearance.
How thick is a three coat stucco?
As its name suggests, three coat stucco is applied in three layers: 3/8-inch thick scratch coat, 3/8-inch thick brown coat, and approximate 1/8-inch thick finish coat. The approximately 7/8-inch three coat system is applied over an approved weather-resistive barrier and metal lath either by hand using a trowel…
How do you apply stucco over wood?
When applying stucco over open-frame wood construction, wait at least 48 hours before applying the brown coat. Applying the Brown Coat The brown coat is the second coat of stucco. It too consists of QUIKWALL® Base Coat Stucco Mix. The brown coat is applied to a thickness of 3/8″.
What is the thickness of a three-coat system?
Three-coat systems consist of: first coat = 1/4 inch thick, second coat = 1/4 inch thick, and finish coat = 1/8 inch thick over both masonry and cast concrete. When required by ASTM C 926, Section 5.2.2; an exterior bonding agent, conforming to ASTM C 932, shall be used on all masonry surfaces.
What are the requirements for a three-coat system over wood?
All accessories must be installed to receive a minimum 7/8 inch application for a three-coat system over wood. Control joints must be continuous through decorative bands or other embellishments, so they will not restrict panel movement.