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I'm not sure that brick buildings in London get pressure washed very often - if ever.

• Ntrails 7y ago
  I would like to put $73 on "never" please
  • kaybe 7y ago
    This article from last years agrees that the frequency of cleaning UK city buildings is quite low. https://news.ycombinator.com/item?id=17883481 https://news.ycombinator.com/item?id=17883481 https://www.manchestereveningnews.co.uk/incoming/gallery/blackened-buildings-manchester-before-clean-8727918 https://www.manchestereveningnews.co.uk/incoming/gallery/bla... I also stumbled upon this discussion on cleaning London buildings in a Lords sitting in 1964 which was quite fun to read. https://api.parliament.uk/historic-hansard/lords/1964/nov/12/cleaning-of-londons-public-buildings https://api.parliament.uk/historic-hansard/lords/1964/nov/12...
    • Cthulhu_ 7y ago
      I saw that gallery of Manchester the other day, that's pretty amazing. But yeah, brick / stone walls shouldn't be pressure washed too often; if they're historical, they should be restored and / or carefully cleaned instead.
• Amygaz 7y ago
  Pressure washing a house is very American, and any building inspector, residential or commercial, will suggest that it is something that shouldn’t be done.