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mold on stored plywood

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Forum topic by fiddlebanshee posted 09-25-2018 05:17 PM 267 views 0 times favorited 4 replies Add to Favorites Watch
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fiddlebanshee

227 posts in 3089 days


09-25-2018 05:17 PM

Topic tags/keywords: wood mold advise plywood

Hi guys,

Unbeknownst to me the air-conditioning in the garage broke and since I had not been in the shop for about a year or more, I found most of my tools with rust (not too bad, I can deal with this), but also some of the plywood cutoffs and panels that I had not used are sprouting mold at the edges. It is only at the edges where you see the plies, not on the surface that I can tell.

What would you do with this?

  1. Throw it all out, the spores will have spread all in between the plies
  2. Cut off only the edge with the mold and use the rest
  3. Treat the mold with mildew killer and continue to use the entire piece.

Also, some of the shop furniture that I made out of plywood also has mold on the edges. What is the best method to prevent this from happening (apart from repairing the AC)? I never finished anything, would applying a layer of polyurethane have prevented this? Any finishes that are particularly mold resistant?

It does not seem to have affected the pine 2×4 in the same way, although the top of the lathe stand that was a glued up pine panel that I got at Lowes did get mildew on some of the pieces but not all! I did clean this up with a mold killer and it looks fine now.

Your help would be appreciated.

-- As if I needed another hobby!


4 replies so far

View Flyfisherlady's profile

Flyfisherlady

5 posts in 22 days


#1 posted 09-25-2018 07:52 PM

Hello,
I’m new here. I am moving my woodshop from an old basement shop into my garage. I had to stop my woodworking because of a real job and life got real busy. Now years later I’m back to making sawdust.
My moldy plywood is birch ply. I can not image using it, except I’m making a strip canoe and need plywood forms.
I thought I would let it dry. I’ll make sure ply is still holding. I have a full face hepa filtter system that I will wear to knock the mold off with a sander. Then I was going to “kilz” it. Any and all pieces not up to snuff will be burned.
My full size sliding crosscut table made with baltic birch was damaged. I’m just going to build it over.
Good luck

View lumbering_on's profile

lumbering_on

331 posts in 633 days


#2 posted 09-25-2018 09:27 PM

Mold on plywood isn’t usually a big deal. Try using soap and water, and if that works, you’re done. If not, let it dry then use a diluted bleach solution, something around 1:4, and let it dry for a day. Then do a light sanding and use a damp cloth to wipe it down.

Make sure you always wear a respirator to avoid any bleach or mold, and then a standard N95 mask when sanding.

View pottz's profile

pottz

3140 posts in 1128 days


#3 posted 09-25-2018 10:27 PM

you might want to invest in a good dehumidifier,but if you only go in once a year that may still be a problem since most need to have the water drained regularly.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View fiddlebanshee's profile

fiddlebanshee

227 posts in 3089 days


#4 posted 09-25-2018 10:39 PM



you might want to invest in a good dehumidifier,but if you only go in once a year that may still be a problem since most need to have the water drained regularly.

- pottz


The AC iand heating is being fixed, so hopefully we will not have this problem in the future. And.. I hope to be able to spend more time in there from how on!

-- As if I needed another hobby!

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