Open Forum

Our organization has tried several alternatives to bleach, including MasonRE products and Krud Kutter, but nothing has worked as well as we would like. We're seeking a long-term alternative to using diluted bleach when performing annual cleaning and pressure washing of the exteriors of (primarily wood) historic structures. Can anyone recommend a product or solution they have had success with? We are located in southwest Florida (so a very hot, humid, and rainy environment). Thanks!

This is a historic preservation issue.  Contact the State Historical Society for technical assistance.  Division of Historical Resources - Florida Department of State

There is a lot of information on preserving historical structures.  Many methods of cleaning are damaging and destructive.  High pressure water on wood is not recommended in that it drives the water into the wood.

I would ask "why are you cleaning the buildings"  Was this done historically? What is the concern about the appearance?  Also check out the wood.  Buildings from this period were built with Old growth lumber.  Much more resistant to decay.  Knowing the species of the wood will help guide you to a preservation approach that would result in long-term damage.

I have been to your site, and did not see any major appearance issues.

Rick Cronenberger, Retired Historical Architect, NPS

Our organization has tried several alternatives to bleach, including MasonRE products and Krud Kutter, but nothing has worked as well as we would like. We're seeking a long-term alternative to using diluted bleach when performing annual cleaning and pressure washing of the exteriors of (primarily wood) historic structures. Can anyone recommend a product or solution they have had success with? We are located in southwest Florida (so a very hot, humid, and rainy environment). Thanks!