Canyon Angler
Addicted to ArboristSite
With rot in the early stages, like dry rot, white fungus, I sprayed straight white vinegar into the wood rafters.
For what it's worth, I've read that you want to raise the pH, rather than lower it (as vinegar would do) to inhibit the growth of dry-rot fungus. One theory for why borax works so well at stopping dry-rot is that it raises the pH. In the right concentration, vinegar might actually promote dry rot.
I also had dry rot beginning in some rafters and 1" pine decking on top of them, and I put chunks of solidified borax up there, and it stopped it...
Also, paint auto Antifreeze on rotting boards. Full strength not that 50/50 stuff which is half water.
Yes, I've heard that, too -- and read that ethylene glycol is deadly to pretty much every living thing on earth, including dry-rot fungus, and yet apparently tastes sweet (which is why dogs love to drink it)...