Efflorescence is the formation of crusty, white salt deposits, leached from mortar or masonry as water passes through it.

• Failure to adequately prepare surface by removing all previous efflorescence
• Excess moisture escaping through the exterior walls from the inside.
• Rising damp in walls where damp courses are damaged, inadequate or non existent, or have been inadvertently bridged, eg: by raised garden beds.

• If moist air is originating inside the building, consider installing vents or exhaust fans, especially in kitchen, bathroom and laundry areas.
• Remove all efflorescence and loose material from the masonry with a wire brush or power brush.
• Apply a masonry sealer and allow it to dry completely; then apply a coat of an ultra premium quality exterior house paint or masonry paint.