The Right Way
Trained workers properly clothed and masked. Engineering controls correctly set up and working. Ducting well sealed. Electrical wiring for machinery and lights correctly installed.
THE LEAKS HAVE TO BE FIXED FIRST. There is nothing in a bottle or a fogger that stops mold growth. All that is happening here is the discoloration on the wood is being bleached. However, the water content from the bleach will feed the micro-sized mold spores remaining on the wood. And the mold will grow again – this worker is basically feeding the mold.
The worker is at risk as he has on the wrong mask and clothing. No containment is being used so all those disturbed mold spores are now traveling through the entire building.
Yes, this is cheap. Yes, you probably will have to do this project over the right way; especially is you have health challenges from mold.