I’m going to cover my roof with skip sheathing since I’ll be covering it with hand split cedar shakes.
I just brought home about a thousand bd.ft. of wood at a price that I can afford (free)
Now I noticed that some of the wood is blue stained eastern white pine.. No big deal right? I mean it’s going to be covered up withshakes and the bottom will be in the attic for cripes sake.. who cares? right?
Or is blue stain a version of mold and it will shortly rot out?
Second the other half of the wood is Boxelder, really cool looking wood with these wild red streaks in it… Have you ever seen boxelder used for roofing material? Is it better or worse than pine etc?
Replies
I'm not sure, but I've heard that the blue staining is a bacterial thing from bacteria induced by some sort of beetle.
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There is a mould named Blue Stain; whether or not the blue coloured stain in your wood is that would be hard to tell from here. I'd say you need to take a sample of that stuff the the most experienced buyer at the best sawmill in town and see what his opinion is.
If you can't get a definitive answer, and you still want to use the wood, you ought to consider treating it with a borax solution, which I seem to remember is effective against blue stain mould.
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"Blue stain does not have any effect on the strength of the wood." Reference: Forest Products Laboratory.
Sheathe away!
According to my logger neighbor, blue stain happens in pine if the logs sit around a little too long before they are sawn. There is no problem with the resulting boards other than aesthetic.