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Forum topic by Harryn posted 07-10-2020 02:34 PM 254 views 0 times favorited 4 replies Add to Favorites Watch
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Harryn

91 posts in 3398 days


07-10-2020 02:34 PM

What’s the best cleaner to remove mildew from lumber?


4 replies so far

View John Smith's profile

John Smith

2519 posts in 972 days


#1 posted 07-10-2020 02:41 PM

do you have some photos to show what you are trying to fix ?
is it fresh mildew from freshly cut lumber ?
or – seasoned for years.

.

-- there is no educational alternative to having a front row seat in the School of Hard Knocks. --

View controlfreak's profile

controlfreak

968 posts in 411 days


#2 posted 07-10-2020 02:58 PM

I know there are products https://www.amazon.com/Concrobium-Control-Household-Cleaners-Gallon/dp/B009AN7Y2U/ref=sr16?crid=1P39H8NLWH6BV&dchild=1&keywords=mold+and+mildew+killer&qid=1594392988&sprefix=mildew+killer%2Caps%2C174&sr=8-6 that “crush” the mildew spores but have no idea how that would affect raw wood. Using bleach only bleaches the mildew but won’t kill it. My gut reaction is to plane the material to remove the tainted part however I would be careful how you handle the air and material if using any powered tools. Stay safe.

View therealSteveN's profile

therealSteveN

5972 posts in 1384 days


#3 posted 07-10-2020 04:49 PM

A good quality ozone generator will kill mold, mildew, bacteria, and viruses. Essentially you need to figure out if you are the source, or if it came to you from elsewhere.

Elsewhere, don’t buy wood there anymore.

If you are the source, then you need to fix the underlining problem, or this won’t be the last tainted wood you will see.

-- Think safe, be safe

View John Smith's profile

John Smith

2519 posts in 972 days


#4 posted 07-10-2020 07:56 PM

to answer a PM from the O/P:

Harry said: ”On the ceiling of a flooded building”

Harry – this still does not put us on the same page as you.
in a forum setting, there are hundreds of potential prospects
of providing responses and suggestions.
the more information you can provide, the more accurate the responses will be.

your reply is a very wide description.
again, what kind of wood (oak, poplar, cedar, cypress, mahogany, etc).
was the wood ever submerged completely
is the wood stored under the ceiling with supports
or – are the boards actually the ceiling material.
have the boards been removed to be used in another project.
are the boards still attached to the ceiling and you plan to live
or work in the building ??
there is a world of difference between mildew and MOLD.
“mold” can contribute to serious health issues and even death.
personally – I would take a scraping sample to your local Health Department
to have it analyzed to determine if it is even safe to work with.
and what about the rest of the building, if it was “flooded” ? walls, floors, etc.

as you can tell, there is more to removing an unknown substance than just
spraying with bleach.
just because you kill the mildew and mold spores, it may not remove any stains.
again – photos would help. and now many square feet do you have, how many rooms, etc.

let us know a little more info please.

.

-- there is no educational alternative to having a front row seat in the School of Hard Knocks. --

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