Skip to main content

Solution — "White powdery marks keep appearing on my walls"

Efflorescence Diagnosis & Treatment

Efflorescence diagnosis and treatment — why salts appear, what they signal, and how to stop them coming back.

The white powdery marks that appear on the walls are a sign that the water is moving through the wall. The marks are efflorescence, and they are the salts that are being carried by the water from the ground, the concrete, or the mortar. The water is the wall, and the salts are the water. The efflorescence is a symptom of the water, and the water is the problem.

The first step is to find the water. The efflorescence is the result of the water, and the water is coming from the ground, the rain, or the plumbing. We need to find the source of the water, and we need to stop the water before we treat the efflorescence. The efflorescence will keep coming back if the water is not stopped.

The water can be coming from the ground, and the water is rising up the wall.

The water can be coming from the rain, and the water is penetrating the wall.

The water can be coming from the plumbing, and the water is leaking in the wall.

We look at the pattern of the efflorescence, and we find the source of the water.

Once the water is stopped, we treat the efflorescence. The efflorescence is a salt that is on the surface of the wall, and it is removed with a brush and a chemical. The chemical is a salt remover that dissolves the salts, and the wall is rinsed with water. The wall is then sealed with a coating that prevents the salts from coming back.

We also look at the cause of the efflorescence. The efflorescence is often caused by the water in the wall, and the water is often caused by the construction. The concrete is a material that contains the salts, and the salts are released when the water is in the concrete. The efflorescence is a sign that the water is in the wall, and the water is the problem.

The result is a wall that is free of the efflorescence, a wall that is dry, and a wall that is protected. We document the process, we provide the specification, and we stand behind the fix.

How we work

  • On-site inspection to confirm the source and extent of water ingress
  • Substrate testing where relevant (moisture content, adhesion, cracking)
  • Written specification naming the system, prep required, and application method
  • Certified application following manufacturer specification
  • Documented sign-off and warranty information on completion

Not sure this is your problem?

Symptoms often overlap — a damp wall can trace back to a roof detail, not the wall itself. A site visit gives a definitive answer at no obligation.

Request a Site Visit