How Do You Plaster A Concrete Wall?

How Do You Plaster A Concrete Wall?

Plaster is the finished product of a plastering process. It is a construction material made from cement, sand, water, and additives. It is a type of concrete, but unlike concrete, plaster is not a structural material. It is used to cover walls and ceilings.

Plastering is a process that starts with a ‘scratch coat’ of plaster applied to a clean, dry surface. The scratch coat is allowed to dry, and then a second coat, called the ‘finish coat’, is applied. The finish coat is textured to provide a smooth or decorative finish.

Plaster is often used to cover concrete walls. The concrete provides the structural support, and the plaster provides the finish. Plaster can be used to cover other types of walls, as well. It is a popular choice for interior walls because it is easy to work with and can be finished in a variety of ways.

Plaster is available in a variety of finishes, including:

-Smooth: A smooth finish is the most common type of plaster finish. It is easy to apply and is ideal for walls and ceilings.

-Rough: A rough finish is ideal for rustic or country-style decor. It is created by adding coarse sand to the plaster mix.

-Textured: Textured plaster can be used to create a variety of finishes, including Venetian plaster, stucco, and pebble dash.

-Decorative: Decorative plaster can be used to create a variety of finishes, including marbleized finishes, gilded finishes, and embossed finishes.

Plastering a concrete wall may modify its look, level it, make it more moisture-resistant, and allow you to add texture. It takes time to plaster a concrete wall.

You must prepare the wall and allow for a cure and drying time between plaster applications.

A badly prepared surface may fracture and sag with time, and the plaster will fall off the wall. Old paint, grime, mold, and mildew can cause issues.

Step 1

Construct the concrete wall. It must be completely removed if the wall has been painted and the paint is peeling or flaking. The simplest method is to have the wall sandblasted.

Step 2

If you don’t want to sandblast, install metal lath over the painted concrete wall. Use 7/8-inch concrete screws with washers 12 inches apart to attach the lath to the wall.

Step 3

Caulk any cracks and treat mold and mildew by killing the mold first and then removing any stains. Using a wire brush, clean the mortar joints.

Step 4

When the paint properly adheres to the wall, use a bonding agent on it. Spray or brush the agent all over the wall. Follow the manufacturer’s recommendations.

Step 5

Apply a slurry, slush, or dash coat to the concrete wall. 1 part Portland cement, 1 to 2 parts masonry sand, and enough water to make a fluid mixture.

Cover the entire wall with a dash brush to a thickness of about 1/8 inch. Allow a day for the slush coat to dry.

The terms dash, slush, and slurry all apply to forming a base coat. Use a slurry that is almost liquid in consistency for a very flat finish.

Step 6

Follow the manufacturer’s directions while mixing plaster. Apply a base coat between 1/4 and 3/8-inch thick with a trowel over the dash coat.

For a flat wall, smooth out the plaster. For a textured effect, leave the wall rough. Allow the base coat to dry.

Step 7

Apply a second coat of plaster over the first using the same technique and plaster mix.