If it's on the exterior of a house, it most likely is not a fungus (white mold, for instance), as the environment would not support that growth. It is probably mineral salt crystals called efflorescence, which is white in appearance.
Take care of your nail fungus! It will infect other fingers if you continue to allow it to live! Fungus can take months to get rid of, yet there are many home remedies for nail fungus which do work. You can use vicks, listerine, white vinegar, apple cider vinegar to name a few. It can also very easily spread to other toenails or fingernails. Once fungus has cleared up, continue to use your choses fungus remedy to make sure it does not return.
Dispersal ,
Thorazine
Adobe
A few name are Fomes, Fomitopsis, Ganoderma, etc
A mushroom?
Taranaki Wool
alumina bricks
calcium silicate bricks
There are many type of fungus i.e. the field mushroom is a fungus which is safe to eat - not all mushrooms are
Fungus.
a fungus
Cement bricks are made of Cement- it's in the name.
Fungus
Fungus.
fungi
a fungus