Question: I have mold on some of my logs where there used to be a stack of wood up against the house. Last year, I removed the stacked wood and tried bleaching the mold off of the logs and then stained them. I noticed this spring that the mold returned.
I want to know what type of product you recommend that I use to eliminate the mold. I was thinking about Oxi-Clean and Bora-Care but I wasn’t sure if there is a better solution. Please advise.
Answer: Mold is the beginnings of decay or rot. When blackening or discoloration forms in this way, it is important to take action right away.
There are certainly a number of specific causes for mold growing on wood. The one thing they all have in common is MOISTURE! If the log has mold — it is too wet or was too wet. What to do?
Sanding down the area in question is the first step. When sanding, pay attention to whether or not the wood seems wet or dry. If it is wet and soft, you probably have a problem with rot. Click here for how to replace rotten logs.
After sanding, apply Bora-Care (a highly concentrated form of borates) at least three times in the space of a day or so. Make sure the area dries out completely, keeping rain off it for at least a week.
Once dried, re-stain the area in question. If the mold returns, the log may be too far-gone and it may need to be replaced.
Another important thing to do is look for checks or cracks in the logs that are on the up-facing side of the log. This could be your moisture source? Click here for more information on how to deal with these types of checks.