How to plaster a wall with cement-sand mortar?

Cement mortar is used to plaster walls during construction projects and maintenance procedures. It gives you the ability to arrange the walls, conceal small masonry flaws, enhance the look, and dependable protect brick, concrete, stone, and wooden surfaces. The finishing mixture consists of water, sand, and cement. After the walls have been covered with a layer of soil and the brickwork has been prepared, plastering is completed. After installing beacons, you can begin plastering with cement compounds. Let’s think about the technological features.

KNAUF MN Start plaster gray 30 kg

Plastering walls with cement mortar and its advantages

Cement-sand mortar has long been used in wall plastering to ensure the flatness of the wall base and to remove height variations in the masonry. This shields the walls from the effects of the environment and adds to the room’s insulation against heat and sound. When applied to a smooth, finished surface, wallpaper, tiles, and other finishing materials are securely fastened. To level the walls, plasterboard sheets are also utilized. Nevertheless, this results in a reduction of the room’s usable volume. Plastering makes it possible to eliminate the flaw.

Plastering foam blocks and applying a plaster composition to walls composed of brick, wood, stone, and concrete solve a number of significant issues.

The following are some of plastering’s primary benefits:

• reliable protection of the external and internal walls of the building from moisture absorption. Special modifiers can be used in the plaster composition to increase the moisture resistance of the plaster finish;
• ensuring a comfortable indoor microclimate due to the unhindered release of excess moisture. Regardless of the brand of plaster and the thickness of the finishing mixture, good vapor permeability is ensured;
• effective protection of the premises from the penetration of extraneous noise into the building. Increased soundproofing characteristics are achieved by introducing special ingredients into the plaster mixture;
• reduction of heat loss due to additional thermal insulation of the walls from the facade and interior of the building. Plaster compositions insulate the walls, reducing heating costs;
• improved contact of the plaster with various types of walls. After hardening, the finishing mixture reliably contacts brickwork, stone, wood, concrete and foam plastic;
• improvement of the appearance of the building due to the textured surface and leveling of defects. At the request of the owners, it is easy to give the plastered walls the desired color;

• resistance of the plaster layer to shrinkage processes and deformations. To increase the elasticity of the plaster and prevent cracking as a result of temperature fluctuations, we stretch the mesh before plastering;
• ease and speed of application to the wall surface. When plastering walls, there is no need to build a supporting frame. No special tools are required for finishing;
• repairability of the plastered surface. If local defects occur, the damaged layer of plaster is removed and finishing is performed in small areas using tools such as a trowel.

Plastering has significant benefits, such as the ability to create unique wall textures and decorative relief, as well as reasonable prices for the purchase of finishing composition. Use pre-made plastering mixtures if you want to lower the anticipated cost of finishing tasks. You can decorate and protect the wall surface without using any special equipment. The builders’ and finishers’ toolkit comprises a standard set of tools that are used for the task.

Starateli Plaster Gypsum White 30 kg

Preparing building materials and tools for work

The plaster mixture can be made without the need for any additional ingredients. The final composition consists of the following elements:

• cement for plastering walls. The brand and ratio of binders are determined in accordance with the recipe;
• fine sand. It is important to carefully sift the filler to remove clay inclusions and foreign impurities;
• water. Depending on the brand of mortar used for plastering walls, the amount of water changes.

Plaster compositions may be made on your own or with premade dry mixes.

It’s critical to select the appropriate brand of purchased mixture based on the particulars of the task completed:

• lightweight plaster marked M50 is used to fill local defects and has insufficiently high strength;
• finishing composition brand M100 is characterized by increased strength characteristics and is used for plastering walls indoors;
• M150 plaster mix is ​​resistant to moisture and is used for external plastering of building walls and finishing of wet rooms.

Finishing solutions with the M200 and M300 markings—which have greater strength properties—are used for plastering critical structures.

The following is a list of additional materials needed for plastering:

• special guides. They are set according to the thickness of the applied mortar, which facilitates and speeds up plastering activities;
• plaster mesh. It is attached to the surface before applying the plaster mortar and prevents cracks after hardening;
• nails or dowels designed to ensure strong fixation of the reinforcement mesh.

STAYER PROFI 0830-12 trapezoidal finisher"s trowel 120×120 mm

The amount of plastering work to be done will determine how many of the following tools and supplies need to be ready:

• trough for manual preparation of sand-cement plaster using a shovel;
• a concrete mixer for mechanized preparation of mortar in increased volumes;
• a bucket, container or wheelbarrow for delivering the prepared plaster mix to the work area;
• a rule designed to evenly distribute the plaster mix along the beacons;
• a trowel used to throw the plaster mix onto the wall surface.

Floats will also be necessary to help even out any irregularities on the surface that has formed. Use a ladder or erect scaffolding to make plastering at a height easier.

How to calculate the consumption of cement and sand for applying a plaster layer

You should determine how much building material will be needed before you begin plastering.

The proportion of sand and Portland cement in the plaster mix varies depending on its intended use:

• for M50 plaster, the ratio of sand to cement is 6:1;
• for M100 mix, five parts of sand should be taken for one part of Portland cement;
• in the finishing mortar of the M150 brand, Portland cement is mixed with sand in a ratio of 1:3.

The ratio of sand to cement should be adjusted from 2.8 to 2.4 in order to create more robust solutions for the M200 and M300 grades. Typically, artisans use a 1:3 or 1:4 ratio of M400 cement to sand to prepare a plaster mixture. Plasticizing ingredients are added to the plaster mixture to guarantee higher viscosity and improve the solution’s ability to withstand moisture. The plaster that has been applied to the walls is between 0.5 and 5 cm thick. It is simple to figure out how much plaster is needed to plaster the walls once you know how much plaster is used per unit area.

STANLEY 0-28-211 178×92 mm plaster grinding trowel

Plastering brick walls with cement-sand mortar – preparatory activities

The proper completion of preparatory tasks, such as the following work stages, will determine the plaster’s quality:

• preparation of the wall surface;
• preparation of the plaster mixture.

Every phase of the work has unique qualities. Let’s talk about this in greater depth.

Preparation of external and internal wall surfaces for plastering

Before finishing work is completed, the building’s exterior and interior walls need to be properly prepped:

1. Remove the remains of old plaster.
2. Clean the surface from dust.
3. Eliminate grease and oil stains.
4. Seal the joints of the brickwork.
5. Seal the cracks.
6. Remove height differences and putty the base.
7. Treat the surface with a penetrating primer.
8. Attach a mesh for plastering to the walls.

When finishing walls that deviate significantly from flatness, a thicker layer of plaster is applied to account for height differences. As a result, more building materials are used, and there is a greater chance of cracks and plaster layer peeling in trouble spots.

Plaster Osnovit cement PRO gray 25 kg

Prepare a plaster mix based on cement and sand

Once the preparatory tasks are finished, move on to making the plaster mixture.

The steps to prepare a plaster solution are as follows:

1. Prepare the necessary ingredients in the required ratios.
2. Mix the port -cement with sand thoroughly.
3. Gradually add water during kneading.
4. Perform mixing until a homogeneous consistency of the composition.

It’s critical to comprehend which wall placement option is best. The sand-cement mixtures’ dough-like consistency makes it easier to toss the solution onto the walls and stops it from sliding when a thicker layer of plaster is applied. Make sure there are no lumps in the plaster solution as well. A well-prepared mixture doesn’t blur along the outbuilding; instead, it keeps its original shape.

We fasten metal profiles to the main surface

The beacons help to smooth the plaster solution according to the rule and are affixed to the walls with an equal step.

Installation process of lighthouses:

1. Check the verticality of the wall surface.
2. Cut the guides to the required length.
3. Draw a vertical line, stepping back 0.2-0.3 m from the corner.
4. Throw cement mortar onto the line with a step of 50 cm.
5. Press the guide into the mortar, focusing on the marking.

Install the remaining beacons using a step that equals the rule’s length, in accordance with the given algorithm. A distance of 150–160 cm is ideal between the guides.

Finisher"s trowel STAYER Profi 08295-08 100×80 mm

Applying decorative and protective plaster to wall surfaces

A finishing operation that calls for responsibility and technological compliance is aligning walls with cement mortar. Let’s talk about how to properly apply cement mortar to walls, which serves both protective and aesthetic purposes.

How to plaster with cement – wall plastering technology

A particular algorithm is followed when plastering gas silicate block walls and finishing brick, wood, and stone surfaces. Now let’s look at using cement mortar to plaster a brick wall.

There are three stages to plastering:

1. At the first stage, liquid mortar is thrown on. Splashing is done with plaster of a creamy consistency using a trowel. The layer thickness reaches 0.5-0.9 cm.
2. Then the main layer of finishing composition is applied. The plaster is evenly distributed over the wall surface. The thickness of the finishing layer, depending on the wall material, reaches 3-4 cm.
3. The third final stage is called grouting. It allows you to smooth out irregularities and seal cracks. Grouting is done in circular motions using a wooden or foam float.

After the plaster layer has dried completely, one week later, move on to the final tasks.

Decorative coating Bayramix Marble plaster EcoStone 1-1.5 mm, 977, 15 kg

Final activities after plastering indoors and outside the building

The last phase of finishing work is done once the walls have been plastered with cement and allowed to dry.

Finishing is accomplished in a few ways:

• the original surface texture is formed by spraying;
• the walls are painted in various color shades;
• the wall surface is given increased roughness.

Depending on personal preferences, the preferred final finish is chosen.

How to properly plaster the walls – tips for ensuring quality

In order to guarantee the caliber of plastering operations, the subsequent guidelines must be adhered to:

• carefully seal deep cracks in the walls;
• evenly fill deep cavities with finishing mixture;
• carry out grouting until ideal flatness is achieved;
• prepare a plaster mixture of the required consistency.

Plasted walls’ marketability is determined by the grouting job done correctly. The grouting process is executed using spiral motions. Starting from a circle with a smaller diameter, leading gradually progresses to one with a larger radius.

Let"s summarize

Using cement mortar to plaster walls independently calls for a responsible approach. It is crucial to prepare the wall surface, select the appropriate plaster composition, and complete finishing tasks in accordance with technology. Plastering that is done correctly will protect the building’s walls and enhance its appearance.

Similar articles:

Using a cement-sand mortar to plaster a wall is a simple but necessary procedure to create a smooth, long-lasting surface. With this method, gaps and imperfections in walls can be filled in by applying a workable paste made by combining cement, sand, and water. The end effect is a robust, even finish that enhances the wall’s appearance and offers more defense against wear and moisture.

How is the article to your liking?

Video on the topic

15. Plastering for pennies, with cement mortar.

5 ways to level walls with plaster / cement plaster on walls and ceilings.

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

Plastering walls with cement-sand mortar

A very convenient solution for plastering.

Plastering walls with your own hands with cement mortar

How to bring beauty to cement plaster (grinding training) #facade #plaster #plasteringwalls