Anyone have mold remediation on a commercial building experience or been/are in the mold remediation industry?
I have a maintenance contract on this building that just started, could smell a strong mildew odor in a unit on the top floor north side of the building when completing a PO. Was doing top floor work in the south side of the building no odor. Slight odor in hall at the midpoint of the building top floor. It was unseasonably warm that day, mid 40’s high temp.
I went into the attic, there is a full height fire wall east and west dividing the building in half, attic access on the south side. South attic was hot, no alarming issues, entire building has 6-8 of old blown fiberglass and is wind washed on the exterior eaves. Hip roof. I could see most light locations, bath fans and other penetration by staining on the fiberglass. No active mold growth was visible.
There was a small 2’x2′ open cut in the attic fire wall to the north side. Right at the hole the smell intesified, went in 10′ and looked around, was like a jungle. Humid, mold running up the top chords, eave edge plywood looks like it has been painted black, all plywood has some sort of staining of various intensity, jack trusses off a girder truss looked soaking wet. Nasty. Obviously informed the owner, its pretty clear the sun is protecting the south side.
Inside the units, electric baseboard heat. Carpet showed damp by electric baseboards when I did a quick scan with thermal cam, took the owner up a few days later and it didnt smell as bad and appeared much drier, this was colder out, sun was setting.
So obviously we need to eliminate moisture source, thats not my worry, the method of cleanup is. Cleanup research is all over the place, some companies use chemicals, some use dry ice, some just scrub, all with negative air and I find differing opinion on the chemical, paint and dry ice approaches from works to makes things worse. Decontamination rooms, clean dirty rooms with no real defination of when one protocol kicks in. Epa protocol and IICRC 520 protocol seems to take 2 different approaches.
Also pretest for spore count or waste of time? we know there is mold. More than one guy the owner has talked to has said just “spray it” and correct moisture issue, whatever the spray they are referring to is. Some say bleach works, other opinion is its hazardous and better methods. Very hard to seperate fact from fiction with this stuff, does anybody have any experience dealing with this? It isnt my liability or property, but I want it done right for the owners sake and have some say in the matter being the “construction guy” who will put everything back together once it is remediated, trying to figure out the correct definition of “mold remediation”, a lot of companies seem like snake oil salesman with the franchise systems. We are talking over 1000 square feet pretty black sheathing under a 10 year old roof plus thousands more of various stages of staining and hundreds of feet of what looks like white fuzzy mold running up top chords, obvious liability issue to owner and Id rather not have some clown attorney trying to tap my GL limits, so it seems somewhat of a sensitive situation.
Moisture source seems to be a combination of ice dams, ventilation fans dumping into the space, lack of upper ventilation (hipped roof), and possible roof leak, very few proper vents. Insulation levels are equal both sides.
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