Dark spots with hard waxy stuff coming out of bricks

Question

Hi,

A wall of exposed yellow bricks in my property is sprinkled with black pores, spread out as well as clustered. There's a hard whitish substance that seems to have come out of the pores to the surface.

Please could you help me out with what this is and how best to remove or clean this

Philip · Answer

This is possible depending on how old your wall is if it's very old it could be carbon marks if it's not to old then just mould that's taken hold, watch out for white efflorescence which is ground salts coming up the brickwork and forms a coat of white powdery substance. This will eventually be washed away by weathering or using a hosepipe to flush it away.

Michael · Answer

EFFERVESCENCE ONLY TIME WILL REMOVE IT HAS PROBABLY  BEEN ACTIVATED  BY ACID RAIN. IT IS IN A BAD BRICK ON PRODUCTION. IT GENERALLY ACTIVATED WHEN LAID. THEN SPREADS THROUGHOUT THE REST OF THE BRICKWORK. IT OCCURS EVEN  MORE SO TODAY DUE TO THE POOR MANUFACTURE OF BRICK. IF YOUR HOUSE HAS RECENTLY HAD INJECTION TREATMENT THIS COULD ALSO BE THE RESULT

Simon · Answer

It's just effervescence caused by salt in the clay when they made the bricks you could try a brick acid and scrub it off with a scrubbing brush your need gloves and glasses on or it will burn you skin wash it off with clean water after or it will continue to eat bricks and mortar

James · Answer

Hi it sounds like mould wash with bleach and allow the room to breathe if that doesn't work then contact a mould specialist

Cezary · Answer

The appearance of efflorescence is the result of the dissolution of the salts contained in the bricks or the mortar used. Under the influence of water or moisture, dissolved salts are washed onto the surface of the wall, creating white stains. ... It is most often the wrong choice of mortar that causes white bloom.
We start by removing the cause of the efflorescence. Let's check the tightness of our wall carefully to see if it has crumbled in some place. If so, seal it.
When we are sure that water will not get inside the wall, we can start removing the efflorescence.
The first way is to mechanically clean the wall with a dry brush. When we brush the entire surface, it will be necessary to pour warm water over it from a pressure washer. This should be enough, but if the raid is still visible, it will be necessary to resort to specialized measures.
Chemical preparations for removing efflorescence should be applied to the wall on sunny days, after washing the brick with water and then drying it. We put them on in accordance with what is written on the packaging. As a rule, it is recommended to test a piece of masonry first, and only then over its entire surface.
Efflorescence occurs even on freshly made walls. At the beginning, they look not very threatening, with time they can take the form of hard stains that quickly enlarge their surface.

Bill · Answer

It is a common thing with some bricks the clay which they are made with can be salty and very limey. It's nothing to worry about it will go. it will not affect the property.

Dark spots with hard waxy stuff coming out of bricks

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