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Badly Vented Bathroom Fan leads to attic mold

Q: How can I remove black mold around my exhaust vent?


Our home's previous owner installed a light and exhaust fan combo that moves even more air than most contractor bathroom ceiling fans. It was a selling point for us. The winter after moving in we noticed an 'off smell when putting away Christmas decorations. On further exploration my husband discovered that the new fan had a larger diameter vent pipe, and rather than replace the full vent ductwork through to the roof, the previous owner just inserted the narrow pipe into the newer wide pipe, and wrapped it in in duct tape...
As you can imagine, the simple vibrations from this high velocity fan created enough wobble that the duct tape separated and for months a third of the shower moisture was being venting directly into the attic.
From what I have read on your site, I'm certain the wood's cellulose became a buffet for the mold and its just gross and out of control.
Once the vent is corrected we'll be cleaning up the mold and would appreciate any ideas. Should we using the Mold Coating Sealant once we are done?

Gloria G in Florida

A: First use MoldSTAT Plus to kill attic mold, then fix your vents.

Gloria, you have it right, the combination of moisture and wood makes for good eating for the city of mold growing in your attic. Idea wise certainly killing attic mold on wood is the sweet spot for using MoldSTAT + mold killer. More details about how to go about application and the tools are a bit lower on this page.

What we wanted to call your attention to is when to kill the mold. We recommend quickly killing the attic mold now to prevent the growth from getting even more out of control. By eliminating the mold that has already built up you will reduce spread of mold spores that will happen from the activity of replacing the existing duct work. Once the duct work is replaced, then as a final step, we suggest a re-application of the mold stat plus to get rid of any lingering mold that may have been jostled loose during the construction activity.

As far as a need for Mold Prevention Solutions, as long as the moisture is under control, the attic mold is unlikely to regrow, so a mold sealant would be over kill, but it might make sense to use an anti-microbial mold prevention spray as a final pass to afford 6 months of prevention as the overall attic moisture levels recede.

Attic Mold Remediation Products:

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MoldSTAT Plus Mold Killer
MoldSTAT Plus Mold Killer | Makes 21 gallons
MoldSTAT Plus Mold Killer
EPA registered Mold Killing solution
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Makes 21 gallons

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Fogmaster mold fogger
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Mold Cleaning - Mold Cleaner
MoldSTAT Plus - Contractor ( 128oz | makes 168 gallons)
Mold Removal Bulk
EPA registered
Makes 168 gallons
Kills mold without bleach

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Mold on attic trusses and plywood underlayment

Q: What is best way to kill mold in my attic?

I am interested in Mold STAT mold cleaner and killer, and was wondering what the best way to kill mold in my attic?
The mold in the attic is on the plywood and trusses and I want to do it right so I don't have to do it again.
Didn't know if anyone had any attic mold removal suggestions.
I would appreciate any info you could give me. Thank you very much.

Ron S in Florida

A: Use MoldSTAT Plus to kill attic mold

You can effectively kill mold on wood in your attic using MoldSTAT + mold killer by soaking the mold growing on the trusses and plywood and allowing it to stay wet for at least 10 minutes then air dry. The mold killer solution can be applied using a pressurized sprayer, or for deeper penetration the Fogmaster Mold Fogger.

If the mold growth is thick may need to soak the trusses and plywood multiple times. Remember that MoldSTAT Plus can only kill mold that it touches.

Related Mold Removal Tags:

Attic Mold Remediation, mold in attic, white mold in attic, kill mold on wood