Efflorescence on Brickwork, Causes, Appearance, and Solutions
Understanding Efflorescence on Brickwork
Efflorescence on brickwork is the appearance of a white or pale powdery deposit on the surface of bricks or mortar joints. It occurs when soluble salts within the masonry are carried to the surface by moisture and left behind as the water evaporates.
Efflorescence is a common and natural occurrence in brickwork, particularly in new builds, extensions, and recently installed brick slip systems.
Causes of Efflorescence on Brickwork
The primary cause of efflorescence on brickwork is moisture movement through bricks or mortar. As water passes through the masonry, it dissolves salts that naturally exist in the materials and deposits them on the surface.
Common causes include:
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New brickwork or freshly applied mortar.
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Rain exposure during or after installation.
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Moisture within backing materials or substrates.
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Seasonal drying and curing cycles.
Efflorescence is cosmetic and does not indicate a fault with the bricks themselves.
Efflorescence on Brickwork in Traditional Construction
In traditional brick construction, efflorescence is most commonly seen shortly after building work is completed. In many cases, it naturally disappears over time as the wall dries fully and salts are gradually washed away by weathering.
Persistent efflorescence may suggest ongoing moisture ingress that should be investigated.
Efflorescence on Brickwork with Brick Slips
Brick slip installations can also experience efflorescence, particularly during the curing period of adhesives and pointing mortar. Because brick slips are thinner, the white residue may appear more noticeable at first.
In most cases, efflorescence on brick slips fades naturally. Light dry brushing or gentle cleaning can be used once the surface has fully dried. Sealing should only be carried out after efflorescence has subsided.
Efflorescence on Brickwork and Slips from Stock
At Slips from Stock, our brick slips are designed to allow normal curing and moisture movement. Efflorescence is treated as a temporary cosmetic issue rather than a performance concern.
Understanding efflorescence on brickwork helps prevent unnecessary worry. With time, ventilation, and correct aftercare, the residue typically clears, leaving behind a clean and durable brick finish.