I'm helping out a friend with a fairly serious mold problem in her basement. The walls are showing pretty good signs of mold infestation about 3 feet up from the floor, with closets much higher. The water issue has already been solved,m but we're still looking at about an 800 sft basement with mold on most walls 3 feet up. The idea that i have is to remove the affected drywall about 4 ft up and hang new drywall in the affected areas. The problem is removal: I'm going to wear a respirator, tyvek suit and hand/eye protection and bag the stuff before I move it through the house. Ducts and furnace intakes will also be sealed. Is it safe for me to help her out or does she need to call in a mold abatement company? I'm getting a lot of conflicting information on the web.