trying to get this white stuff off the exterior brick work of a customers house.
i sprayed it w/ bleach & hit it w/ high pressure water…did nothing.
looks like it’s run off from the siding.
I saw the same thing today, is it from a sprinkler system?? I haven’t tried yet but was going to offer it to a customer but don’t want to if it’s not able to be removed.
what i’m facing is definitely not from a sprinkler, but i’ll keep a look out for that, thanx bro’!
it’s likely calcium carbonite. You have to soda blast it to get it off.
Charlie
Thanx Charlie.
I’m on it Saturday
Remember to take some before and after pics, and whenever someone has something similar, market the heck out of it.
Most contractors have no idea what this is, or how to remove it.
Charlie
Efflorescence its when moisture with clacium comes through stone or masonry, the water evaporates and leaves the dried calcium behind. Eacho chem and I think prosoco both have products for it. Powerwashing is not the solution and you have to be careful you don’t force moisture into the substrate.
could you try to use a brush with muriatic?
John is spot on with efflorescence. Here’s a link that will explain it if you’d like to read it. Aldon (the company on the link) has great products, but they certainly aren’t the only ones. Basically, it takes an acid to break down and remove the salts. If it’s pretty minor (light efflorescence) you may even have good luck with CLR from your local big box store, or phosphoric acid (products such as grout haze remover, located in the tile section.) Muriatic acid would certainly work given it’s extremely low pH, but I would suggest it only as a last resort. It’s dangerous not only in terms of health but also liability/damage to surrounding areas/surfaces/plants. Why go to that extreme if it isn’t necessary?
Just be sure to use as little moisture as you can, otherwise you can draw more out as it dries
