Formation of salty deposits, leached from mortar or masonry as water passes through it. Efflorescence is usually caused by excess moisture on the surface.
- Excess moisture in the wall or plinth, structural deficiency details or paint applied too soon.
- Poor surface preparation and removal of previous efflorescence.
SolutionIf excess moisture is the cause, eliminate the source: repair the roof, clean the gutters and drainpipes, check the damp proofing and drainage in the plinth, and fill any cracks in the masonry. Make sure that earth slopes away from the plinth. If moist air originates from inside the building, increase the effectiveness of ventilation in the kitchen, bathroom, and laundry room.
Remove efflorescence and loose material with a wire brush, power brush, or pressure washer. Rinse well and allow to dry.
Do not paint before efflorescence has stopped forming completely.
Masonry should be painted only after one heating period and plastered at least 1 to 2 months after rendering. Paint with a suitable Tikkurila exterior paint according to instructions.