If moisture exists behind walls or in slabs and lime is present, salt deposits or efflorescence are often not far behind.

Salt can form on bricks, concrete and mortar joints if moisture is present and has the opportunity to react with the lime component of the cement, creating an unattractive, white appearance on your walls.

The moisture comes and goes as it forms and then dries. As it is forming, it draws the lime out of the concrete up to the surface.

When it then dries and evaporates it leaves behind the salt which looks like a white powder on the surface.

Rock hard stain build up

When more moisture arrives through the substrate it brings more salt deposits to the surface and so on building, a white looking salt stain on the surface.

The Stain Eaters have a cleaning solution that breaks down the salt and removes it from the surface.

If in an external situation, water under pressure can be used. If internal, a hand cleaning technique is safest with appropriate controls around the environment to ensure that other infrastructure is not effected.

Unfortunately, the salts will reform until the source of the moisture is eliminated from behind the wall.

Surface sealers are ineffective because the moisture build­up eventually pushes the sealer off the wall.

Use slider above to view before/after images

heavy lime stains

How to identify Lime Stains

Common locations: Brick Walls

Appearance: A hard white or grey crust-like appearance. Usually running along the mortar join or from a hole or crack between the brick and mortar joints.

Cause: Lime carbonate staining is caused when water gathers inside a brick wall. This usually occurs when rain has been able to enter the wall cavity during construction or from poorly executed waterproofing, enabling water soluble calcium compounds to dissolve.

How to identify Efflorescence Stains

Common locations: Efflorescence (sometimes referred to as ‘salt deposits’), can be found on internal and external brick, tile or concrete walls or floors.

Appearance: A white, loose, powdery substance. Will often disappear when wet, but reappears after the surface has dried.

Cause: Salts can form in bricks, concrete and mortar joints if moisture is present. These salts then react with the lime component in the mortar or concrete. As the moisture evaporates, the white, unattractive crystalline salt stains form on the surface.

salt stain removal

efflorescence stain removal

When you engage our specialised services, you are protected by the following:

If salt deposits are staining your walls, give The Stain Eaters a call for a solution!

Our qualified technicians will first investigate the stain to ensure that we correctly identify the cause, and then determine the correct solution to the problem.

The Stain Eaters Rock-Solid Guarantee – We Get it Right the First Time

We have more than 40 years of experience with exterior cleaning and we’ll make it simple – and fully compliant. We’ll get it right the first time and help you maintain the value and appearance of your property.