mold in attic from whole house fan

Q: Should I run the Fan after killing the attic mold?

I have mold in my attic on the sheathing and roof joists, dormers and such. It’s on the north side only. The area is about 1500 sq ft of sheathing and 40 joists.

I have used a whole house fan for 18 years, and just recently found the added moisture I blew into the attic over night caused this attic mold only on the north side.

I’m getting air conditioning installed and will no longer be using the attic fan, so the source of the issue is being corrected. I’m also getting my eve vents opened up to increase air flow

I plan to use the mold fogger with the moldstat plus to kill the mold, and I understand that black color go away eventually ( I am not selling my house, so that would be fine with me.)

Should I run the attic fan, or the whole house fan to speed up the drying process?

Louie from Raleigh

A: Just let things air dry

Louie, you are correct that after treatment with MoldSTAT Plus, the mold color may turn a lighter black or possibly gray and may fade over time. Even though you are not moving, if you wanted to get rid of the mold color immediately, just brush the dead mold off the surfaces.

Regarding the using the fan to expedite drying, it is really your choice. Once the mold killer has been applied, the marginal amount of humidity pulled in from the fan, won’t have an impact on the mold because it will have been killed within the first 10 minutes.

Related Posts

2 Comments

  1. Stephen K

    We lived in our house 12 years and only had soffit vents, but Last summer after the rains ended the mold began. In our case we had mold in attic insulation, rafters and beams. We went the the DIY route with mold stat plus and the fogger and had great results (not to mention saved a bundle).

    The only thing I would mention is that initially Clair was hesitant to use the MoldStat because the warning label made it seem dangerous. But after a quick phone call we learned that the warnings on the concentrate apply to specifically to the concetrate. Not the solution once mixed.

    When you mix 1.5 tablespoons into 1 gallon, it makes sense that the concentrate would be hot!Don’t let a caution label result in losing hundreds by paying for mold removal.

    • Mold Removal Pro

      Good to know.. I always recommend readers pull a bottle of bleach from the laundry room and thoroughly read the label. Scary stuff…
      I just want to add that YES, while the In Use diluition does not share the same warnings, you should still be very carefull and responsible when measuring the concentrate.. Because the warnings do apply to it.