Stucco scratch coat

Applied Over: The brown coat in the stucco process is applied over the scratch coat mostly but can also be applied over cement based substrates as well, like the scratch coat. Tools Used: The scratch can be applied with a hawk and trowel , or sprayed on. The stucco scratch coat mix is a simple recipe that really consists of san cement and water. Complies with ASTM C 9requirements for cement based plaster.

This product also can be used as the first coat in a two- coat application for exterior stucco applications. Basic plastering skills, Why, how to apply a Scratch coat in stucco Kirk Giordano plastering Inc. Traditional, or 3- coat stucco is applied over the lath in three thin coats: the scratch coat , the brown coat , and the finish coat. The scratch coat is applied first and is embedded into the metal lath to provide a strong base for the system.

This mix is the perfect base coat choice for a traditional three coat stucco application. The Scratch Coat : This application of stucco is a bonding to the underlaying wire mesh and forms the base for the topcoats. The traditional application of stucco and lath occurs in three coats — the scratch coat , the brown coat and the finish coat.

The two base coats of plaster are either hand-applied or machine sprayed. A portland cement based stucco used for construction and repair of stucco walls. If using synthetic stucco , use fine sand. Scratch coats are the bottom layer or coating of plaster that is applied to a wall.

While still wet, this coat is scratched using a trowel or some type of serrated blade. This article will give you some helpful advice on how to properly mix stucco. The various layers that make up a stucco exterior wall finish contain basically the same ingredients, but are mixed at different ratios.

This material is typically applied in four coats: the dash coat , the scratch coat , the brown coat , and the finish coat. Color can be applied in hours. It is similar in appearance to Portland cement plaster and may be applied using similar methods. This stucco system consists of a scratch coat , brown coat and finish coat. Apply the scratch coat of stucco using a trowel and a hawk, if necessary.

These scrapes provide teeth for the next coat of stucco to hold onto. The first is a “ scratch coat ”, applied to give the secon heavier coat something to stick to. The second coat is called the “brown coat ” or “levelling coat ”. It smooths the surface over which the third “finishing coat ” will be applied.

Stucco is applied in three coats. Three coat is the original stucco process, consisting of paper and wire, a scratch coat , a brown coat and a finish, or “top” coat. In industry terms — lath, scratch and brown. The finish coat is not considered a step because it is needed on every type of application that is use so they are mainly referring to the stages up until the. To make stucco for scratch coat , mix Portland cement, hydrated lime and sand.

Mix the ingredients in a 5-gallon bucket or wheelbarrow with a hoe or other heavy pole, adding water until the slurry has the consistency of pudding. Applying stucco is almost always a two-step process. The stucco mixture is a combination of clean san masonry cement and Portland cement. SPEC MIX Scratch and Brown has a custom blended sand gradation that increases the walls flexural strength while reducing cracking and crazing.

With the advent of fiber-reinforced Portland-cement, stucco systems today are very often two- coat systems (a base and finish coat , but often referred to in the industry as “one coat ” stucco ), rather than the three- coat systems of yesterday (a scratch , brown, and finish coat ). The one- coat stucco system consists of a wire lath attached to. Are there guidelines or restrictions on placing each successive coat ? He did a scratch coat , a brown, coat , and a finish coat of stucco. He had to keep the scratch coat moist until it was time to apply the brown coat. Some builders combine the scratch coat and brown coat into one base coat.

If you choose to do this, plan on a total stucco thickness of about ⅜ inch ( mm) for cast concrete, and ½ inch (1 mm) for unit masonry. Mix finish- coat stucco with water to the same consistency as the base coat , adding stucco colorant as needed to give the material the desired hue. Use long strokes, knife swaths and other techniques to give the stucco the desire texture.

Flatten the final texture with a trowel. QUIKRETE finish coat stucco is designed for use as a decorative finish over portland cement base coats or QUIKRETE one coat fiberglass reinforced stucco. Install building paper, metal lathe and three coat ( scratch , brown and finish) stucco. Includes planning, equipment and material acquisition, area preparation and protection, setup and cleanup. The last step will be for us to pick a color and have them come back and put on the final coat.

A scratch coat is a base layer of cementitious material that is literally scratched horizontally with a comb-like tool. Wood-sheathed buildings are a different matter. Wood sheathing itself will not provide a proper base for stucco finish. The creation of scratches in the surface helps the finish coat of stucco to adhere to the scratch coat properly.

Then the scratch coat is allowed to harden. The cure time between the scratch and brown coat in a. The three- coat system is the best way for a homeowner to apply stucco to masonry or brick siding. First, the homeowner cleans and preps the wall.

Then she applies the bonding agent followed by a basecoat, or scratch coat , of stucco. ParexUSA 1OR 3SERIES BROWN COAT 7. Job-site finish coat : part white portland cement(or regular portland cement), 1-parts lime, parts sand.