Can fungus weaken bricks? The walls of my 1930s house show what appears to be fungus, although only up to damp course level. This is a very light, light grey in colour and irregular. The walls have never been covered, with the exception of a small south-facing section which has been obscured by a large fuel bunker, now removed, for about 30 years. Here the growth is also irregular but thick and white.
Wire brushing this leads to dust which falls, rather than spores which float away. There are also numerous hard, tiny nodules which turn into what looks like chalk when chipped off. Assuming all this is in fact fungus, can it be treated? I thought of brushing with Jeyes Fluid.
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Fungus and brickwork new
Fungus and brickwork new