Most decorative plasters require some skill to apply in order to get a flawless result. But there are formulations that create great coverage without many layers and the formation of texture, and are worn quickly and easily. We are talking about marble plaster, widely used for finishing both exterior and interior surfaces.
The main component of the plaster is filler - ground marble or granite of various grain sizes. Filler granules have a rich palette of natural shades, but to increase the decorativeness of the coating, they are very often tinted using a special technology.
Most manufacturers use acrylic resins as a binder, although there are marble plasters and mineral-based ones. It is easy to distinguish between them: acrylic compounds are transparent and translucent, mineral - white and colored.
Different shades of marble plaster
Colors of marble plaster
In addition to the binder and filler, the plaster contains antibacterial agents, water-repellent additives, a solvent, various modifiers to increase plasticity, adhesion, color fastness and other properties of the coating. Additionally, the solution may contain glitter or mother-of-pearl, giving the plaster a more interesting look.
Depending on the granule size, the plaster is divided into fine-grained (grain thickness up to 0.
5 mm), medium-grained (1-3 mm) or coarse-grained (3-5 mm), respectively, and the texture of the coating is different. The filler fraction also affects the material consumption:
The layer of mortar application should be at least 1.
5 times the filler grain size. On average, the coating thickness varies between 5-30 mm. The plaster dries for about a day, but here much depends on the temperature and humidity of the air, layer thickness and composition.
Finishing the facade of the building with marble plaster
Popular brands of marble plaster.
| Coarse marble acrylic plaster. |
The color palette includes 15 shades of natural marble. The average consumption is 4.5-5 kg / m2, the drying time is a day. Packaged in plastic buckets of 20 kg each
| Water-soluble composition on an acrylic base. The filler is small round marble granules. |
The color palette includes 24 natural shades, warm and neutral. The composition is suitable for hand and machine application. Consumption is 1.5-2 kg / m2, drying time is about a day.Packaged in 25 kg buckets
Ceresit CT 77
| Composition on acrylic base, with a filler fraction of 1. |
4-2 mm. The color palette includes more than 50 color options. Material consumption is 3.5-5 kg / m2, complete drying time is 72 hours. Packaged in 25 kg buckets
| Composition based on acrylic resin, the filler fraction is 0. |
5, 1.5 and 2 mm. Produced in various colors according to RALL, Monicolor Nova, Bolars catalogs. Consumption is 2.5 kg / m2 for fine-grained plaster and 4 kg / m2 for coarse-grained.
Drying time - 48 hours. Packaged in plastic containers of 15, 25 and 45 kg
Bayramix decorative plaster MACRO Mineral
Macro mineral marble plaster
Micro Mineral Bayramiks
Marble plaster has very significant advantages:
In terms of cost, marble plaster is much more expensive than textured, but cheaper than Venetian.
Since special skills are not needed to apply it, you can apply it yourself and save a lot on the services of professionals. As for the shortcomings, the only drawback is the large weight of the coating, due to the presence of stone filler.
Marble plaster on the facade of a private house
Marble plasters are excellent for finishing surfaces that require enhanced protection from moisture - foundations, plinths, external walls of houses, and also saunas, pools and bathrooms.
Marble plaster applied to the wall
Thanks to their convenient application, such compositions are also an ideal solution for finishing curved surfaces - columns, niches , curly ledges, bay windows. They are used for finishing openings, small architectural forms, residential and non-residential premises.
Marble plaster: decoration of the walls of the apartment
These solutions can be applied to any bases that are not prone to shrinkage: concrete, brickwork , foam and cinder blocks, chipboard and drywall, plastered surfaces.
Decorating the walls of the cottage with marble plaster
The base for the plaster must be even, dry and strong, otherwise the coating will not last long.
The surface must be dry, clean, pre-leveled
Therefore, first, the walls must be cleaned with a brush from dirt and dust and carefully inspected surface. If there are crumbling areas, swelling and peeling of the plaster, thoroughly clean everything to a solid base. Use a metal brush or grinder with a nozzle for this.
Clean masonry joints especially well, as this is where voids are most likely to form.
Places affected by fungus, mold, after cleaning, are treated with chlorine-containing agents or antiseptic compounds. Efflorescences on the walls also need to be eliminated so that they do not appear on the surface of the new coating. For this, there are special cleaners that can be bought at any hardware store.
To seal grooves, chips and cracks, a standard cement mortar is prepared - a part of cement for 3-4 parts of sand.
Cracks must be expanded and cleaned of dust before sealing, and when filling with mortar, use fiberglass tape for reinforcement. Next, using a rule or level, check the plane of the walls and, if necessary, perform alignment with plaster.
Tip. Coarse-grained decorative mixtures can be applied to a rough leveling layer, and under fine and medium-grained plasters, a finishing layer is applied along the base layer, which, after drying, can be sanded. The thinner the coating, the smoother the base should be.
After plastering, wait until the walls are completely dry, and treat them with primer. To prevent the base from showing through the finish, it is recommended to choose a covering primer (for example, Astar Bayramix, Ceresit CT 16) and tint it before applying it to the wall to match the color of marble plaster. This applies to acrylic-based formulations, since a conventional primer with a quartz filler is suitable for mineral plasters.
Application of a primer tinted to match the plaster
The primer dries 12 hours
With the surface ready, you can start with tools and materials.For work, you will need a drill with a mixer nozzle, a stainless steel grater and trowel, clean water at room temperature.
Plaster should be purchased with a margin of 7-10% of the total volume, since part of the material falls off during application and remains on the walls of the container and tools.
Tip. For monochromatic facade decoration, purchase plaster from one manufacturer (preferably one production batch). Even if the compositions of different brands are visually very similar, after being applied to the wall, they can noticeably differ in color and texture.
Plaster may be ready to use, but more often the mortar is too thick and needs to be diluted with water or thinner.
This information must be indicated on the label by the manufacturer, and the proportions are also given there. For example, 25 kg of Bayramiks plaster requires up to 1.5 liters of water, and 20 kg of Ceresit mix requires only 125 ml of water. In order not to spoil the expensive material, carefully study the instructions before proceeding with the decoration.
Open the container with the solution and mix well with a mixer. If necessary, bring to the desired consistency with water.
Preparation of decorative plaster solution
Step 2. Collect a small amount of solution on a trowel and apply to the surface while holding the tool at a 60 degree angle. The mixture is spread in an even layer, in one direction, rubbing with effort over the base.
The walls are processed in squares, preventing the edges of the plaster layer from drying out.
Application of decorative plaster
It is important to keep the same layer thickness
Apply the mixture in small portions
Tip. If it is necessary to interrupt the work, stick masking tape along the border of the treated area, apply and level the solution, and then remove the adhesive tape along with the rest of the plaster mixture.
The procedure for organizing plaster joints
Step 3. After 20-30 minutes, when the plaster will begin to set, they begin to grout the surface.
To do this, use a stainless steel grater. The tool is firmly pressed against the wall and smooth the coating in a circular motion, trying to maintain the same pressure. It is not necessary to press too much, as well as to process one area for a long time.
Smoothing is carried out on wet plaster
Plaster leveling trowel
The plaster dries within a day
Step 4. After the plaster is completely dry, the surface is covered with acrylic varnish or a water repellent.
For these purposes, it is most convenient to use a spray bottle.
Applying a protective coating
The varnish dries 12 hours
Mechanical application can be used to speed up the work process, especially if the area is large enough. Finishing is done using a device called a pneumatic crumb blower.
Diagram of a manual crumbling machine for applying plaster
Pneumatic bucket for wall plastering
Micro-mineral plaster crumbling machine
It is a small container with a nozzle at the bottom, a nozzle and a special nozzle connected to the compressor. The diameter of the hole for the solution supply should be 4-6 mm.
The surface is prepared as described above, after which the plaster solution is poured into the container, the air is injected with the compressor and the application is started. The working pressure should be 6-7 atmospheres. The nozzle of the device is kept at a distance of no more than half a meter from the surface and slowly moved from top to bottom, making sure that the solution covers the base evenly.
Air bucket application
Working pressure and nozzle size
Distance to working surface
Consumption of plaster when applied by spray
Half an hour after application, the plaster is rubbed with a metal trowel, and after complete drying, it is covered with a protective compound.
Additional smoothing of applied decorative plaster
Hopper bucket for plaster
For greater decorativeness of the facade during finishing, plaster of two or three colors is often used, creating curly inserts, stripes, various ornaments.
In this case, the technology for applying the solution has some differences, although there is nothing complicated here either.
To make colored inserts with straight lines, you will need masking tape, a spirit level, a long rail and a marker. First, a sketch of the elevation is drawn and the location and size of the colored areas is determined. Then they carry out the markings on the wall, clearly highlighting all the contours. Select the areas that will be finished first and stick strips of tape around their perimeter.
After that, they take the plaster of the desired color and carefully apply it to the prepared surface, trying not to go beyond the scotch tape.
An example of applying decorative plaster in two shades to the facade
After grouting the plaster, the adhesive tape is removed and new stripes are glued along the edge of the treated areas so as not to stain them with the solution. Plaster the rest of the area, grout, remove the masking tape. Thus, you can make inserts of any size and in any quantity, the main thing is to arrange them correctly and choose matching colors.
After leveling the plaster, the masking tape can be removed
Carefully remove the tape and smooth the joint if necessary
Drawings of any type are made using masking tape
In order for the marble plaster coating to be truly reliable and durable, several important conditions must be observed when applying the solution:
.. + 25 ° C, and the relative humidity is not more than 65%, and not only during application, but also during the drying period (up to 3 days);
After applying the coating, the tools must be immediately cleaned of adhered solution, since it is very difficult to do after curing.
If you did not immediately soak the tools in water, you will have to clean them with a grinder
It is impossible to wet the plaster for the first three days until it will gain maximum strength.
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