Efflorescence is a white or light-colored powder that forms on the surface of the masonry when water evaporates from the pores of the mortar or concrete. It is caused by water seeping through cracks in the wall or other openings and is often the result of faulty construction or poor drainage.
While salting itself is not harmful, it can lead to serious problems if left untreated. It can cause the mortar or concrete to crumble and break down, leading to structural damage. In addition, it can trap moisture in the wall, which can cause mold and mildew to grow.
Efflorescence on walls is a common problem in apartments. It is unsightly and can cause serious damage to your property if left untreated. But don’t despair – there are ways to get rid of this problem for good. In this article, we’ll show you how to remove efflorescence from your walls and prevent it from coming back.
Causes of Efflorescence
You can find it on almost all types of masonry. It can also be seen on new plaster. Water is the major contributing factor to this phenomenon. It dissolves soluble salts present in or on materials. These salts, along with water, move towards the surface where water evaporates, leaving behind the deposition of salts.
Here is the complete detail on the causes of efflorescence and a guide on dealing with it when you come across this hidden hazard.
1. Poor Quality Mortar
Poor quality mortar is one of the most common causes of efflorescence. When the mortar is of poor quality, it doesn’t bind well to the bricks or other masonry materials. It can allow moisture to seep in and cause the minerals in the mortar to dissolve and be carried to the wall’s surface.
Solution
Remove all the loosened mortar and clean the area. Apply a stronger mortar to repair and use sealants to avoid moisture problems
2. Inadequate Drainage
When rainwater or melted snow doesn’t drain properly from around a building, it can seep into the masonry. Minerals dissolve and appear on the surface of walls.
Solution
Contact professionals to ensure proper drainage of your apartment and surroundings
3. Use of Solvents or Other Chemicals
The use of solvents or other chemicals can also cause efflorescence. When these chemicals come into contact with the masonry, they can break down the mortar, allowing the minerals to leach out and appear on the wall.
Solution
Avoid all solvents and chemicals for cleaning that have hazardous effects on walls.
4. Penetration of Water Through Cracks or Pores in the Wall
Water can penetrate the masonry through cracks or pores in the wall. When this happens, the water dissolves the minerals from the materials used and puts them on a wall, commonly called salting.
Solution
There should be a proper masonry repair for cracks and pores. Also, remove all the water sources
5. Rising Damp
When there is damp ground around a building, the moisture rises through the walls and causes minerals deposition on evaporation.
Solution
Unfortunately, we can’t fight external damp conditions; however, we can use sealants to prevent moisture from entering the walls.
6. Poor Construction
It can include the following factors
- Failure of appropriate ventilation for masonry
- No installation for moisture barrier
- Break down of joints in construction
- Improper storage of construction materials
- Leaking pipes or plumbing fixtures
- Improperly sealed masonry surfaces
Solution
Consult highly skilled professionals for construction purposes
7. Atmospheric Pollution
Atmospheric pollution is the common cause of efflorescence often ignored. When the air around a building is polluted, the pollutants can settle on the walls, and salting starts there.
Solution
Chose a pollution-free location for the apartment to live in. Remove all pollution sources; for this, you can collaborate with the Municipal administration or DIY.
8. Condensation
Condensation can also cause efflorescence. When humid air comes into contact with a cold surface, such as a masonry wall, the water in the air can condense and form droplets. These droplets can then seep into the walls and dissolve the minerals. Hence the problems occur.
Solution
Use water-resistant barriers and sealants
Difference From Spalling
Efflorescence is the phenomenon often confused with spalling. Efflorescence is the deposition of salt on the surface of masonry as the result of water moving through the masonry. While spalling is the flaking or chipping of the masonry surface by the freezing and thawing water.
Salts Associated with Efflorescence Found in Construction Materials
Following efflorescing salts are present in different construction materials.
- Calcium carbonate
- Sodium chloride
- Magnesium sulfate
- Potassium sulfate
- Sodium sulfate
- Vanadyl sulfate
- Potassium carbonate
What Does Efflorescence on Walls Indicate?
Efflorescence can be an indication of a serious problem with masonry. If left unchecked, it can cause the masonry to deteriorate and eventually crumble. It can also lead to mold and mildew, which can cause health problems.
How Can We Prevent this from Happening?
You can follow the given professional guidelines to keep your property safe from salting
- Use high-quality mortar
- Ensure proper drainage around the building
- Use weather-resistant barriers
- Seal cracks and pores in the masonry
- Avoid using salt-based cleaners
- Keep the area around the building clean and free of debris
- Reduce humidity levels inside the building
- Monitor the humidity levels and check for any signs of efflorescence.
Removal of Efflorescence
- Brush the affected area with a stiff-bristled brush to loosen the salts.
- Vacuum the area to remove all deposits
- Mix a solution of equal vinegar and water, and use a brush to scrub the efflorescence.
- Rinse the area with clean water.
- Repeat steps 2-4 until the wall is clear
- Seal the area with a waterproof sealer to prevent future problems
Home Remedies for Efflorescence
Vinegar
Mix equal parts vinegar and water, and use a brush to remove the salts from the surface.
Lemon Juice
Mix equal parts lemon juice and water, and apply to scrub it from the walls
Baking Soda
Baking soda paste is also useful in removing salts
Hydrogen Peroxide
Mix equal parts of hydrogen peroxide and water to apply to salts.
Dish Soap
Add a few drops of dish soap to water and use this to remove deposits
Valet Works – The Expert in Efflorescence Removal
Valet Works has the experience and expertise to safely and effectively remove efflorescence from your walls. We use state-of-the-art equipment and techniques to gently remove the build-up of salt without damaging your wall or underlying structure. We also offer preventative treatments to help keep efflorescence from returning in the future.
Frequently Asked Questions
What causes efflorescence on interior walls?
Water seeps through cracks in your walls and comes into contact with salt naturally occurring in masonry materials. As the water evaporates, it leaves a salt deposit on your wall’s surface.
Is efflorescence a serious problem?
Efflorescence is not a major threat to your apartment, but if left unchecked, it can be a potential source of other masonry issues and mold growth. It is a sign that there is water damage to your wall.
Does efflorescence go away?
Efflorescence will usually go away on its own as time passes. But for immediate removal, you need to contact masonry experts, or you can also use various chemicals manufactured for this purpose.
What happens if you paint over efflorescence?
If you paint over efflorescence, there will not be sufficient adhesion, and the paint will peel off eventually. Wall will lose its tidy appearance.