Quote:
Originally Posted by Bud Cline
Ceramic and stone tile are the only products that require special conditions and somewhat semi-rigid minimums for a successful installation.
Woods and laminates are much more forgiving. 
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Agreed, but If I need to replace any joists, I feel it is better to do it before I install any new flooring. That way I could nail through the old flooring into the new joists.
I may just add another line of support mmidway of the old undersized joists. Well, I say undersized, they may not be if the cross braces were nailed at the bottom. It seems that would add a lot of strength.