Plaster on concrete walls

One popular technique for creating a smooth, long-lasting surface is plastering concrete walls. For centuries, people have employed this technique to enhance the appearance and atmosphere of indoor areas. Concrete flaws can be filled in with plaster, which also gets the wall ready for paint or other finishes.

Plaster’s excellent surface bonding is one of the main factors in its popularity for concrete walls. Concrete walls can be uneven and rough, but these problems are easily fixed with the correct kind of plaster. As a result, the wall gains strength in addition to aesthetic appeal.

Plastering concrete walls can be done at home, but it does take some patience and skill. Plastering typically requires a few steps, including cleaning the surface, bonding agent application, and plaster layering. Plastering can greatly improve a wall’s durability and appearance when done properly.

Than to plaster concrete

We will discuss leveling monolithic concrete surfaces below. In a different post, we discussed plastering cellular concrete.

The first step is to determine which mixture is best for plastering concrete walls. As a general rule, you should begin your solution selection by considering the circumstances surrounding the finish.

The binder used in the plaster’s composition determines its characteristics. This criterion categorizes mixtures into multiple types:

• cement;
• lime;
• cement-lime;
• gypsum;
• polymer.

Although cement mortar is thought to be universal, working with it is not particularly convenient. Its primary benefits include affordability, strength, and resistance to moisture.

Drawbacks: limited pliability, prolonged solidification time, and poor adherence to a polished concrete surface. I use it to plaster wet rooms, such as the kitchen, bathroom, and toilet, starting from the street side. In residential buildings, puttying is required after cement mortar is applied because the sand in the composition causes the walls to become rough.

Lime compositions are highly resistant to cracking and are simple to apply to walls. Minus: insufficient power. Reinforcing materials must be added to the mixture in order to produce a long-lasting coating.

Lime is occasionally added to cement plaster to enhance its properties. The adhesive and plastic properties are enhanced by such a composition.

Lime also inhibits the growth of mold and has antiseptic qualities.

Plasterers and painters love using gypsum plasters. They create a healthy microclimate, increase heat and sound insulation in spaces, and are simple to install on walls and ceilings. They also dry far more quickly than cement plasters.

But since gypsum is water-phobic, it can’t be used to finish bathrooms or pools. Overall, this is a great choice for finishing under decorative plaster, painting, or wallpaper in residential spaces.

Although polymer compositions are not used to level walls and are far more expensive than other materials, they have very good performance properties. Their primary function is as a decorative finishing coat.

Is it possible to putty a concrete wall without plaster?

On occasion, the home owner gets lucky and discovers perfectly level concrete walls where the plane is visible both horizontally and vertically. In this instance, putty will have to do in place of plastering the walls. It will cover up small cracks and irregularities. In this instance, the putty will be thicker than when it is applied over plaster; it may be up to 3 mm thick overall and up to 5 mm thick in certain places.

Important: The wall’s surface needs to be primed and free of dust before putty is applied.

Preparation before plastering

The right base preparation for the mortar’s subsequent laying is essential to producing plaster of the highest caliber. This is how concrete walls are installed:

If there is old finishing in the form of wallpaper or paint, it must be completely removed. Cracked and peeling pieces of putty or plaster are also removed. Cracks are expanded using a chisel and hammer.

Crucial! Concrete contact, also known as adhesive quartz primer, must be used to prime the surface before applying gypsum plaster. Although this only affects the top layer, such a primer clings to the surface with reliability, so it’s best to clean the wall thoroughly before using it.

Using tile adhesive

Numerous adhesive compositions are available in hardware stores as dry mixes. Because tile adhesive has more favorable technical properties than putty, it is frequently used for plastering walls, even serving as a layer in between cement and sand mortar. Plastering with a cement plaster and tile adhesive mixture is a commonly utilized method.

In the workplace, Ceresit CM-11, Knauf Fliesen, Unis, and Craps all perform admirably. In general, the technology is comparable to using mortar made of cement and sand.

Present rates:

The following are the nuances:

• The adhesive has high adhesion, is applied to walls without reinforcement.
• The material is more viscous than ordinary cement plaster, it is more difficult to work with it, the formation of drips is possible with a thick layer of mortar on the wall.
• High viability of the solution – 3 hours.
• The maximum thickness of such a finish should not exceed 10 mm.

Work technology using the example of a bathroom

1. The current finishing is removed from the walls. Detergents and water are used to remove oil stains. Mold and mildew are removed with a metal brush. Then the surface is primed.
2. Tile adhesive is prepared in a container. Detailed instructions are included by material manufacturers.
3. The adhesive composition is applied to the cleaned and dust-free surface with a notched trowel, the optimal tooth size is 6 mm. The glue is leveled and beacons are installed.
4. After the solution is given 24 hours to dry.
5. Then mix and stir the cement plaster. Apply it to the wall manually or mechanically.
6. Start plastering from the corners and then move on to the ordinary sections. To level the layer and remove excess mortar, the rule is from the bottom up.
7. Leave it to dry for 2 days. After that, you can lay the tiles.

Plastering concrete walls is a useful technique for creating a surface that is sturdy and smooth. It shields the walls from damage in addition to improving their appearance. To guarantee that the plaster adheres well, proper preparation is essential. This includes cleaning the surface and applying a bonding agent.

It’s crucial to select the appropriate plaster type for concrete walls. Because cement-based plasters are strong and work well with concrete, they are frequently chosen. But always keep in mind the particular requirements of your project, like finish quality or moisture resistance.

Plastering concrete walls can be an easy process with excellent results if the proper methods and supplies are used. A surface that is long-lasting and aesthetically pleasing can be achieved by taking the time to properly prepare and apply the plaster.

An efficient technique to produce a smooth, long-lasting finish that enhances the wall’s appearance and guards against damage is to plaster concrete walls. By directly applying a layer of plaster to the concrete surface, this method creates a smooth, even surface that is ready for painting or decorating. Cleaning and priming the wall properly guarantees that the plaster will stick well and produce an eye-catching, long-lasting finish.

Video on the topic

Boiler room in a private house, part 2, plastering concrete walls, cement-sand mortar ,

To prevent plaster from swelling on a concrete wall!!!

How well does plaster adhere to smooth concrete

The process of plastering concrete walls with tile adhesive in the bathroom with your own hands. Plastering concrete with glue.

PLASTERING (plastering) CONCRETE (panel) WALLS WITH YOUR OWN HANDS. WITHOUT SKILL AND WITHOUT EXPERIENCE.

How to plaster concrete walls with gypsum mixture?