I have recently purchased an old house (built in approximately 1900) in the United Kingdom as a renovation project.
The brickwork under the porch has been fairly well protected over the years and is still very clean. However, the brickwork above the porch and around the rest of the house has developed a black staining:
Would I be correct to assume that this staining is simply from rain?
In the coming weeks the house will have a scaffolding for other works and so I was hoping also to deal with this staining at this time.
Do you think it would be possible to restore the house brickwork to the original colour (as seen below the porch) and if so, what method(s) would be suitable to obtain this?
Thanks in advance