Was wondering if someone could give me some advice please.
We built an extension a year ago, and have an issue with an internal wall which was made of reclaimed brick.
Its a double cavity wall - (outside is blocks / insulation is poly beads).
A lot of the bricks have some sort of white growth on them. It looks like crystals or fur, and is 1 or 2 mm in length.
I have attached a pic to show a sample.
It strange, because whole areas are not effected, instead its random bricks!
I have scrubbed it off a few times now and it always quickly grows back.
Does this look like efflorescence, and if so how best can I remove it permanently?
Thanks so much
Ms T McB