These salts, derived from long-term water ingress, absorb atmospheric moisture, causing significant plaster deterioration. Over time, this can result in the deliquescent state of the salts, where they dissolve into the absorbed moisture. The presence of hygroscopic salts is most evident in areas with high relative humidity, such as condensation-prone environments.
One common source of salt dampness is the presence of vegetation, such as weeds, within chimneystacks. This "roof garden" effect indicates prolonged water ingress, often leading to internal wall damage and structural decay. Unqualified repairs, such as repointing without addressing the root cause, exacerbate the problem, allowing salts to migrate through capillary action into other areas of the property.
Persistent dampness and staining on plaster surfaces.
Salts striking through newly plastered or dry-lined walls.
Bitter taste on the wall surface, indicating the presence of salts (though professional testing is recommended over crude methods).
According to BS 6576:2005+A1:2012 Section 10.4, standard plasterboards or gypsum-based bonding plasters should not be used in areas affected by hygroscopic salts. Effective measures include:
Plaster Membranes: Installed to prevent moisture and salt transfer, while enhancing wall thermal value and reducing condensation risk.
Professional Repairs: Ensuring qualified contractors apply systems compliant with the British Standard.
Comprehensive Inspections: Addressing structural integrity and moisture sources to implement long-term solutions.
Olympic Surveyors specialises in installing systems like Dry Base Flex Membranes, compliant with industry standards, ensuring properties are structurally sound and free of damp-related issues.
Specialist Surveyors with expertise in cavity wall assessments.
Multi-award-winning PCA members , regulated by RICS.
State-of-the-art diagnostic tools ensuring accurate results.
Tailored remedial solutions for long-term property protection.
If you suspect wall tie failure or structural movement, contact Olympic Construction Ltd for a professional wall tie inspection.Early detection and expert remediation ensure the stability and longevity of your
