Luke, I am not familiar with the exact product / method you describe, but....
It sounds like a bromate (bromine salt) solution is applied. I don't see how it would 'weaken' the wood, but it might make the surface softer.
Any treatment applied to wood, to make it "fire resistant", has only been evaluated to reduce the surface flammability of the wood. That is, the ability of a flame to catch on the face of the wood, then spread along the surface. There is absolutely no reason to think that the wood will, ultimately, burn any differently than "normal" wood.
AFAIK, all 'fire' and 'rot' treatments applied to wood are based upon some sort of salt (though not necessarily table salt!). Keep this in mind, especially in moist areas; those same salts will corrode metal just as well.
Last edited by renosteinke; 04/10/07 12:54 PM.
