My Covid Vacation Part 2: Biofilms and Masonry Repair

Biofilm removal from on top of and below waterproofing layers on these marble lions exemplifies our work on cleaning sculptures, cemetery headstones, and doing cleaning mockups on buildings in a more sensitive and long-lasting manner than is typically used.

What is that black stuff growing on our buildings? Biofilm cleaning challenges for buildings

Biofilm growths on the Jefferson Memorial with laser cleaned slice showing, 2018

Black slime is attacking our national monuments and buildings ... and it's all our fault. The methods of building cleaning the last 30 years have created a difficult to remove biological soup on our buildings. Here is why we need to change our ways.