White Deposits on Walls: Moisture and Efflorescence
White deposits on masonry or concrete can be associated with salts carried by moisture.
ODS Construction Chemicals · Waterproofing information
What to record
White deposits on masonry or concrete can be associated with salts carried by moisture. Record the pattern, whether it returns after cleaning and whether it changes with rain. A photograph alone cannot establish the moisture source or the correct treatment.
Before choosing a repair
Cleaning the deposit treats the visible surface. Assessment should consider how moisture reaches the wall, the condition of joints and finishes, and suitable drying or repair measures. Avoid applying an incompatible coating over a damp substrate before the cause has been addressed.
Discuss the scope
ODS Construction Chemicals focuses on waterproofing, supported by concrete repair, flooring and finishing. We also consider selected renovation and construction projects. Send the location, photographs and proposed scope to confirm whether we can take on your project. A guide is not a quotation or a promise of a particular method, product or completion date. Where a project proceeds, the written scope sets out the work and any warranty offered.
More on this from our guide library.
Blistering Paint: Check Moisture and Preparation
Blistering or peeling paint can involve moisture, contamination, poor preparation or incompatible coating layers.
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Basement Seepage: Information for an Assessment
Record where water appears on basement walls or floors and whether it changes after rain.
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