Blue Stain is not destructive to the wood and will not cause rot or structural damage. In fact, blue-stained wood is used for cabinets because it is considered by many to be attractive. These people are willing to pay a premium for it. A high proportion of timber frame owners also enjoy the blue striations in the timber frame, as it gives it more character. 

However, if you do not like the look of Blue Stain, talk with your timber framer about ways to control or eliminate it. They include using winter-cut timbers, which are not as susceptible because the sap is down; or dipping the timbers in a fungus-killing chemical, which will retard it for a while. Keeping them well-aired while stacked will also help. Scrubbing the timbers with a bleach mixture can reduce the visibility of the Blue Stain. Once the timber frame is erected and the timbers are in a lower humidity indoor environment, the Blue Stain will stop spreading.

 

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