Paint for cement plaster

There are distinct compositions of plaster for exterior and interior use, with different emphasis on specific qualities that fit their application scope. Therefore, a paint mixture that is resistant to moisture, temperature fluctuations, ultraviolet radiation, etc. is needed when painting facades. Vapor permeability and safety are critical for interior spaces.

We’ll examine both varieties of plaster paint in this piece. We will also discuss wall painting procedures and their preliminary preparation.

• Silicate paint for external plaster work is weather-resistant due to its composition – calcium borate, alkali-resistant additives and liquid glass. It penetrates deeply into the surface, protecting it well from atmospheric influences, and is quite chemical resistant. Average vapor permeability. The disadvantage of the silicate composition is the impossibility of tinting in bright colors.
• Perchlorovinyl paint. Its main advantages are its low price, wide color palette and the ability to be applied outdoors even in cold weather. Has high chemical and biological stability. Disadvantages – it is highly flammable, when painting a facade on plaster it emits toxic fumes and has a strong smell.

How to choose the right composition

The following considerations should be kept in mind when selecting a composition for painting external walls over plaster: the walls absorb atmospheric precipitation, so the facades should be painted as hydrophobic as possible; the surfaces of the facades are exposed to sunlight and thus need to be UV radiation resistant; the lower portion of the walls and the area around doors are frequently subject to mechanical stress.

It is important to take into account the composition of the plaster if you plan to tint it over an existing paint layer. External walls painted with lime-cement plaster are painted using an acrylic-acrylic mixture, etc. d. It makes sense to test different stains and see which ones work best if it is impossible to ascertain the composition of the previous coating.

Preparing facades for tinting. Determining the expected consumption of trains

Initially, standard procedures are followed to assess the plaster’s condition and remove any flaws that may already exist. There should be no crumbling or dusting of the surface. The walls are puttied level if needed. The walls are then painted with a primer that penetrates very deeply. Preparation should be taken very carefully, as the service life of the new coating depends on it.

You will need to do some basic calculations to determine how much facade paint is used for every square meter of plaster. We calculate the area of the house’s external walls and multiply the result by the number of them; we also calculate the area of all door and window openings and deduct it from the wall area; finally, we multiply the result by the average consumption per 1m2, which is indicated on the packaging. The calculation result is multiplied by the number of layers if more than one is to be applied.

Most paints used on façades are applied in two layers. Lime compounds are an exception; they cover the walls in three stages. Avoid saving and reducing the number of layers to avoid the "apple" effect, which causes patches of the prior color to appear in some areas.

Technology of painting decorative plaster on facades

The composition must first be mixed, either with a mixer or by hand using clean wooden slats. Next, if needed, add color. If a large area needs to be painted and multiple packages need to be tinted, the pigment is precisely measured by weight or volume for each package to ensure consistent shade.

Vertical brush or roller movements are recommended when applying the first layer of plaster. Applying the second layer crosswise to the first horizontally is how it should be done. In this manner, the overlap will be stain-free and as dense as feasible. Working swiftly, you should cover as much ground as you can in one sitting. It is decided that the day will be warm, dry, and, ideally, windless.

• Silicone based paints. Form an antistatic, waterproof coating with average vapor permeability. Forms good adhesion to any type of plaster, can be cleaned with sponges and brushes. Ideal for showers and bathrooms.
• Oil paints. Provides a washable, matte or glossy surface. Works well on almost all types of paints. Cons: Strong odor during application. The consumption of oil paint per 1m2 of plaster is quite high.

Selection criteria and calculation of the amount of paint for plaster inside a house or apartment

It is crucial to consider the room’s operational load before applying decorative plaster to the walls. Therefore, materials intended for use in the kitchen and hallway need to be highly resistant to physical forces, chemicals found in the home, and moisture. The final two parameters have no bearing on how the ceiling is treated. Plaster coloring mixtures for children’s rooms should be safe in addition to washable.

Interior paint with a higher vapor permeability is preferable. You can even give up some other considerations when making your decision in favor of this attribute. A healthy microclimate is ensured in residential areas through the use of "breathable" mixtures. This is particularly valid for kid’s rooms and bedrooms.

Buying paint from a single manufacturer along with related products like putties, solvents, and primers will help you avoid unpleasant surprises. Generally speaking, the packages list their mutual compatibility.

Similar to facade work, the amount of paint and varnish materials is determined by taking the room’s total area, deducting the area occupied by window and door openings, and then multiplying the result by the consumption figure/m2 listed on the container.

Do-it-yourself preparation and painting of decorative plaster

Tasks to be completed:

• Aligning walls vertically and horizontally, if necessary.
• Cleaning and filling of small defects in plaster walls for painting.
• Sanding surfaces first with coarse and then fine sandpaper.
• Dust removal of leveled and sanded surfaces.
• Single or double treatment with a primer, depending on the requirements specified on the paint package.

Open the paint cans, give them a good shake, and add more color if needed. We perform a test stain in a discrete area to determine whether the final color is to your liking. If not, it will be fixed. Additional work is completed using a paintbrush or roller and crosswise motions as per standard procedure. The quality of the plaster determines the latter’s softness and pile length; smooth surfaces are best suited for a foam roller, while relief surfaces require one with a pile coat.

Applying two colors to ornamental plaster painting. working with textured bark beetles in a video. Painting Venetian flooring can be done similarly.

Selecting the appropriate paint for cement plaster can change the appearance and durability of your walls. It’s critical to choose a paint that provides breathability, longevity, and weather and moisture resistance. The right paint will protect the plaster from damage and cracks while enhancing its aesthetic appeal, whether you’re going for a subtle finish or a vibrant color. This guide will give you advice on how to get the best results from your painting project and assist you in understanding the important factors to take into account.

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