In 2004, OSU released a study regarding the effectiveness of bleach to remove mold growth from wood surfaces. The entire study can be found here.
Feel free to read the entire study (it’s only a few pages long), but we’ll summarize a few important points from this research.
• They measured the effectiveness of water and water/bleach mixtures (from 2.5% to 20% bleach) to remove the visible staining that mold causes on wood.
• They discovered that while washing the boards reduced staining/discoloration by 5 to 15% – there was no significant difference in the effectiveness between all the treatments.
• So from 2.5% bleach, all the way up to 20% bleach – water was just as effective in reducing discoloration as a bleach mixture was.
• Additionally, they concluded that bleach does not eliminate surface microflora on wood. Microflora being the microscopic fungi that grows into the large mold patches you see.
• Finally, the study notes that reducing the moisture level of wood (below 20%) is necessary for proper mold remediation.
Doesn’t it seem a little silly to douse mold with a cleaner that’s 90% water when the goal is to remove the moisture from the surface?
We think it is.