Rehabilitating plaster against bacteria, fungi and almighty

Many buildings have plaster surfaces, which give the walls and ceilings a smooth, long-lasting finish. But over time, fungi, bacteria, and other dangerous microbes may find a home on these surfaces. These intruders can seriously endanger occupants’ health in addition to detracting from plaster’s aesthetic appeal. It is imperative that you take immediate action to resolve these problems if you want to keep your living or working space safe and attractive.

In order to restore the surfaces of plaster impacted by microorganisms to their original state, a combination of cleaning, repairing, and treating must be done. Understanding the precise kinds of bacteria or fungi present and determining the scope of the issue are usually the first steps in the process. This information is essential for choosing the best treatments and making sure that the root causes—such as moisture buildup or insufficient ventilation—are taken care of.

After the preliminary evaluation is finished, the visible contamination must be eliminated. This may entail cleaning the area thoroughly, removing damaged plaster, and using specific anti-microbial treatments. Long-lasting protection is provided by these treatments, which not only eradicate current microorganisms but also aid in halting their growth in the future.

Lastly, plaster needs to be repaired in order to regain its flawless, smooth finish. To finish the restoration process, this can entail filling in any holes or fractures, putting on a new coat of plaster, and painting or sealing the exterior. You can successfully counteract the effects of fungi and bacteria by following these steps, which will guarantee that your plaster surfaces stay safe, hygienic, and visually pleasing for many years to come.

Sanitary plaster – description and application

Plaster is defined as the substance used to create a two-layer vapor-permeable coating that permits moisture to evaporate while allowing salts to crystallize and remain inside. Plaster is thought to be a great tool for waterproofing and protecting the primary wall material because it aids in surface drainage.

Sanitary mixtures are frequently used for wall repairs, foundation repair, cellar decoration, and bathroom renovation. Use of the solutions is especially advised in semi-basement and basement spaces where the masonry is highly salinized. Because they obstruct the damaging effects of capillary moisture and salts, they significantly increase the lifespan of walls and coatings.

Mixtures of equal quality can be used to restore historical structures and monuments. They are also frequently employed in situations where waterproofing was either partially or inadequately completed.

Advantages and disadvantages of sanitary plaster

The two layers of sanitary plastering are a base layer with a porous structure and an appropriate sanitation layer. A "pie" like that consistently keeps moisture out of the room by preventing leaks. The following are some benefits of using rehabilitation plaster:

• reducing the risk of alcohols due to the uniform distribution of salts in the thickness of the material;
• extension of the service life;
• prevention of the appearance of bacteria, mold due to a decrease in humidity and antiseptic effects;
• prevention of unpleasant odors in the house;
• creation of waterproofing, protection of structures from atmospheric precipitation;
• improving vapor permeability, due to which air masses freely leave the room, which gives the effect of natural ventilation;
• lack of cracking, including when applying a thick layer;
• the ability to use for internal and external works, use as a cladding without further cutting;
• significant sulfate resistance;
• Environmental friendliness of the composition, harmlessness to the environment and health of residents.

Rehabilitation mixtures have very few drawbacks, but they should be mentioned. These compositions typically have a higher price tag than regular plasters. You will need to bring in experts if you don’t have experience applying them because they need to be done with consideration for all the nuances of the technology. It is not advised to use this kind of waterproofing to shield other structures, such as retaining walls, from pressurized water supplies or groundwater. Furthermore, gypsum bases do not react well to standard rehabilitation plasters; instead, unique lime mixes that have varying degrees of strength and moisture resistance must be used.

The reasons for the appearance of salt divorces on the facades and walls of the basements

Salt stains, also known as vésols, on foundations, walls, and facades have a negative impact on the building’s lifespan in addition to its aesthetic appeal. These kinds of flaws are particularly common on the homes owned by the old fund. They emerge as a result of water starting to seep through the foundation or walls due to high capillary tension. This process is sped up if the building is shoddily constructed and has structural flaws.

The capillaries start to erode the top layer of plaster due to moisture and filling it. Salts from soil and construction materials are dissolved and gathered by moisture as it moves. Only salt layers, appearing as whitish stains, are left on the surface following the evaporation and drying of water. The plastering layer and other finishing materials run the risk of being completely rejected if there are an excessive number of them.

Sanitary plaster for the bathroom

The rehabilitation plaster demonstrates its strength and protective qualities to the fullest when it comes into contact with water and high humidity air. Because of these features, you can use it to decorate bathrooms, where waterproofing is extremely important.

Bathroom floors are typically tiled in ceramic. Sanitizing plasters will not break under the weight of the decoration because they are highly resistant to destruction and have a high clutch power. Additionally, sanitizing agents stop mold and fungus from growing. In addition to tiles, they can be painted over, covering the bathroom walls without the need for tiles.

To keep the plaster’s ability to drain, it is only necessary to select a paint with good vapor permeability. If a moisture-resistant decorative mixture is chosen, it must also respect the room’s microclimate.

Sanitary plaster for the foundation and walls

This material is widely utilized in many different types of building and restoration projects. It works well on fresh or damaged bases to create a black layer or finishing. Prior to plastering, any defects such as altitude on the surfaces or coating detachment zones are removed.

Work tools

Plaster can be applied manually or with the aid of a machine. When using a manual method, get ready by:

• construction mixer for breeding the mixture;
• container for kneading;
• Spatulas – wide, medium, narrow, corner;
• Graters and half terriers.

Metal brushes will be required to remove the old coating and increase clutch from the walls, and brushes and rollers will be needed for priming. Should the decision be made to apply plaster mechanically or automatically, you will need to buy a compressor, spray gun, or other plastering equipment.

Utilizing cutting-edge antimicrobial paints and additives that form a barrier of defense on the surface is necessary to restore plaster so that it can withstand bacteria, fungus, and other contaminants. By stopping the growth of dangerous germs, these solutions not only increase the lifespan of plaster but also enhance indoor air quality. Professionals and homeowners alike can ensure both structural integrity and visual appeal by incorporating these contemporary materials into their walls and ceilings, which also happen to be cleaner, healthier, and more resilient.

Technology for applying the material

Two layers of sanitary plaster are applied, and the technique used differs slightly from that used to process walls using traditional building methods. The pores in the first layer of rehabilitation plaster are fairly large, which helps the water that the layer below filtered evaporate.

The order of work

First, a leveling layer of plaster—typically 20–40 mm thick, though it can be thinner—is put to the prepared base. This layer is required to create a flat plane, cover up the masonry joints, and fill in any defects. When it’s dry, he’ll extract moisture from the walls, gather salt, and keep them from going outside. The second layer of sanitary material can be used as a base for decorative plaster or as a finish coating prior to staining.

Preparation of the mixture

Since cement is the primary ingredient in the majority of the mixtures, they can only be realized in dry form and must be bred before being used. It is impossible to dilute the mixture too much at once, and using it all up before it hardens will not work.

If the mass is not applied within 20 minutes, it will lose porosity as it dries. The powder is mixed thoroughly with a construction mixer for five minutes after being added to the water in the amounts recommended by the manufacturer. Pouring the liquid into the mixture is not necessary because it will be nearly impossible to stir the lumps.

Preparation of walls for work

A thorough preparation of the surface is done before beginning plastering. The state of the walls or other surfaces determines the sequence in which the preparatory steps should be done. It’s critical to assess the base’s salinity level and the durability of the previous coating. You will need to clean the material up to the carrier wall if the plaster has fallen off in chunks or is heavily salted. A metal brush is used to remove different heights.

It’s crucial to remove any materials from the base before plastering because they can weaken the material’s adherence. These consist of bitumen, oils and fats, paints, varnishes, dirt, and dust. These areas are treated with an antifungal mixture, and the mold and fungus are also eliminated. If such techniques are available, you can use sandblasting or pressure-washing water to clean the walls and other structures.

Subsequently, the inter-launch seams must be widened and lowered by a minimum of 2 cm. They leave notches on walls that are overly smooth. The base is covered with a deep penetration soil that should be ideal for a particular substrate material and mineral plasters in order to bind dust and strengthen. Reinforcing fiberglass nets are applied at the plate joints.

The sequence of application

You can move on to the primary phase of the project once the structure has dried. First, a half-spray application of a standard cement-sand solution (mixed 3:1 with water) is made for the base layer. Adding adhesive additives to the solution is a must. The layer should be at least 0.5 cm thick after laying, but ideally 1-2 cm. Large flaws, chips, and masonry seams are all manually filled. After using a grater to leaf the mass, align it without rubbing it until it’s smooth. If more leveling is required, allow the plaster to dry before applying it again.

As long as the humidity doesn’t rise above 50%, 1 mm of the base layer usually dries out that day. Fifteen minutes after leveling, the base is scraped with a metal brush in order to reinforce the clutch with sanitizing. Another option is to roll the layer using a specialized roller, which is typically used if the surface will eventually be tile-pasted.

A sanitary layer with a thickness of less than 2 cm forms after the base layer dries. It is applied in multiple methods, allowing each 1 mm layer to dry for 24 hours. The final layer smoothes down the walls and gets rid of all imperfections and rough spots.

Finish

Sanitizing yourself can provide a finish if needed. It is acceptable to prime and paint it in this scenario because paint has a high vapor permeability. On the hygienic layer, you can also apply ornamental plaster or adhere various cladding types.

Rehabilitating plaster is essential for preserving hygienic living and working conditions because it guards against bacteria, fungi, and other dangerous microorganisms. These microbes can seriously endanger occupants’ health in addition to causing damage to plaster surfaces. We can increase the lifespan of plaster and make interior spaces safer by taking quick action on these problems.

One efficient method of inhibiting microbial growth in plaster mixes is to add specific antimicrobial additives. By limiting bacterial and fungal growth, these additives keep them from attaching themselves to plaster surfaces. Over time, this proactive approach saves money and time by reducing the need for frequent maintenance and repairs.

Apart from the addition of additives, appropriate application methods and routine inspections are crucial. By applying plaster correctly and controlling moisture and ventilation, it is possible to prevent the growth of microorganisms. Frequent inspections make it possible to identify problems early and take appropriate action before serious damage is done.

In the end, plaster rehabilitation using these techniques benefits building occupants’ general health and well-being in addition to maintaining the buildings’ structural integrity and aesthetic appeal. We make everyone’s living and working environments more resilient and healthful by making investments in these preventative measures.

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