How To Brown Coat Stucco On Rough Concrete Wall
This will form the bonding between the topcoat and the anchoring of the scratch coat.
How to brown coat stucco on rough concrete wall. Includes planning equipment and material acquisition area preparation and protection setup and cleanup. This acts as an ideal base for the finish coat which is integrally colored in most cases and is what you see on stucco so the base needs to be uniform. Some masons skip over this step but it doesn t hurt to spend the time for this process. In industry terms lath scratch and brown.
Apply the first coat of stucco to the concrete surface. This mix is the perfect base coat choice for a traditional three coat stucco application. Meets astm c926 requirements for portland cement based plaster. Use for scratch coat stucco and brown coat stucco applications.
This first coat is known as the scratch coat this coat helps the final coat bond properly to the wall. It s usually finished in a rough texture. Stucco installation labor basic basic labor to install stucco with favorable site conditions. Use the flat finishing trowel to spread the stucco evenly across the surface.
Three coat is the original stucco process consisting of paper and wire a scratch coat a brown coat and a finish or top coat. For the brown coat you will need. Allow the scratch coat to harden slightly. Base coat stucco can also be applied directly to masonry walls for a two coat application.
1 part portland cement. Finish parex usa watermaster krak shield he 1. Parex usa 100 or 300 series scratch coat 8. This process can take some time and patience but is not too difficult to do in fact it is the easiest process out of all of the base finish coats.
Parex usa 100 or 300 series brown coat 9. Let this cure 24. Stucco can be applied to wood sheathed walls in typical frame construction by adding a metal lath over the wood. Notice the mix has more sand.
The scratch coat should be between 1 4 and 1 2 inch thick. Parex usa mesh embedded in stucco level coat 10. Apply directly to masonry walls in a two coat stucco application. After the cement is on the wall a scratcher is used to make horizontal lines in the stucco mix in order for the next coat the brown coat to stick to it.
And 3 1 2 to 5 parts sand. Install building paper metal lathe and three coat scratch brown and finish stucco. 1 part hydrated lime. Can be applied with a trowel or sprayer according to typical stucco techniques.
A stucco wall must be supported by some load bearing material such as wood or concrete. Scratch and brown coat in a three coat stucco application. Can be used to repair stucco walls. The finish coat is not considered a step because it is needed on every type of application that is used so they are mainly referring to the stages up until the.
Parex usa weather seal 5.