What should moisture readings be for internal walls?
Moisture readings for internal walls can vary depending on factors such as the location, construction materials, and climate. However, moisture readings above 16% are generally considered too high and may indicate a moisture problem that requires attention.
Waterproofing Techniques for Internal Walls
1. Surface Treatment
- Apply a waterproof sealant or paint to internal wall surfaces. These sealants are designed to resist water penetration and can significantly reduce moisture absorption.
- Use a water-resistant primer before applying paint to further protect the wall from moisture.
2. Injection Grouting
- Involves injecting a water-resistant grout into the wall cavity through small holes. The grout expands and fills any voids or cracks, creating a barrier against moisture.
- This method is effective for sealing leaks or preventing moisture penetration.
3. Membrane Application
- Applying a waterproof membrane to the wall surface creates a physical barrier against moisture. Membranes can be made of various materials, such as polyethylene or rubber.
- They are typically applied with an adhesive and sealed at the joints to ensure complete coverage.
4. Wall Coating
- Applying a specialized wall coating designed to resist water penetration. These coatings form a protective layer on the wall surface, preventing moisture absorption and damage.
5. Structural Repair
- In cases where the moisture problem is caused by structural damage, such as cracks or holes, repairing the structural integrity is crucial.
- This involves sealing cracks, repairing damaged sections, or improving drainage around the wall to prevent future moisture infiltration.
Advantages of Waterproofing Internal Walls
- Protects internal structures from moisture damage, such as rot or corrosion.
- Prevents mold and mildew growth, which can impact indoor air quality and health.
- Extends the life of internal materials and finishes.
- Improves energy efficiency by preventing heat loss through damp walls.