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Damp Facade: Why Do Mold and Algae Appear on Facades?
March 6, 2024
What Factors Negatively Affect Facade Surfaces?
Where Do Efflorescence Stains on Facades Come From?
The materials used in facade construction play a crucial role in protecting the building's structure from environmental impacts. However, the appearance of the facade is equally important, as it serves as a distinctive hallmark for the property owner. For this reason, both modern and historical facades must meet increasingly stringent physical and aesthetic standards. Unfortunately, facades are exposed to various threats. Below are the main factors affecting facade surfaces:
Atmospheric Factors
- Rainfall: Rain can cause erosion and the accumulation of contaminants on facade surfaces.
- Snow and Ice: Melting snow, as well as freezing and thawing, can affect the structure of facade materials. In this case, the color of the facade also plays a significant role.
- UV Radiation: Exposure to UV radiation can lead to color fading and surface degradation.
Atmospheric Contaminants
- Dust: Atmospheric dust can settle on facades, creating an uneven layer of dirt and altering the final visual effect.
- Industrial Pollution: Emissions from factories and vehicles may contain chemicals that deposit on building surfaces.
Microorganisms and Molds
- Growth of Algae, Moss, and Lichens: Humid conditions promote the development of microorganisms, which can result in stains and dirt accumulation.
Biological Phenomena
- Impact of Vegetation: Plants can take root in wall cracks, causing surface damage.
Chemical Effects
- Acid Rain: Acid rain can corrode facade surfaces, particularly those made of metal or limestone.
- Chemical Substances: Exposure to chemicals, such as acids or salts, can degrade materials.
Mechanical Damage
- Impacts and Scratches: Mechanical actions, such as impacts, scratches, or damage during renovation work, can affect the facade's appearance.
Construction Factors
- Improper Thermal and Waterproof Insulation: Insufficient thermal and waterproof insulation can lead to condensation problems, affecting the facade's condition.
Execution and Material Quality
- Low-Quality Materials: Using low-quality facade materials or improper application can lead to faster wear and degradation.
Where Do Facade Efflorescence Issues Come From?
The growth of microorganisms on facades can result from various factors, including neglect in building maintenance, improper insulation, and design or construction errors. A lack of regular facade cleaning and debris removal creates conditions favorable for algae and fungi growth. To combat algae and fungi appearing on facades, KABE Algizid Paints can be applied.
Additionally, an excessively thick thermal insulation layer can cause condensation on the facade surface, providing an environment conducive to microorganisms. Poorly protected plinths and insufficient moisture barriers also contribute to facade moisture problems. Adverse surroundings, such as nearby buildings or dense vegetation, can further increase air humidity and facade contamination. Therefore, selecting appropriate materials for waterproofing and renovation is essential to prevent microorganism growth and maintain the facade's condition.
How to Protect Facades for Years?
While external conditions related to a building's location cannot be controlled, facades can be effectively safeguarded by choosing the right solutions, including thermal insulation, waterproofing, plaster, and paint. A key element in preventing mold and fungi growth is properly designed and executed waterproofing, which shields the facade from moisture.
Additionally, applying preventive measures is crucial, as algae and fungi grow on facades only in the presence of adequate moisture levels. Unfortunately, modern architecture often repeats the same waterproofing methods without considering many individual factors affecting a building's condition.
Schedule a Consultation on Building Waterproofing and Renovation
A SANIER expert can help you select the right solutions tailored to your specific issue. If you’re unsure about which materials to choose or how to perform waterproofing, contact us.
Consultation on Building Waterproofing and Renovation
Selection of Technologies and Materials - An online or on-site consultation at SANIER (recommended), during which you will learn more about:
- Vertical, horizontal, external, internal, and moisture-proof insulation, as well as insulation restoration.
- Building renovations.
- Sealing cracks and fissures in ceilings, as well as slope re-profiling.
- Repairs of structures, basements, balconies, loggias, terraces, and floors.
- Finishing terraces and balconies.
- Expanding and remodeling buildings.
