How to Properly Test Wood Moisture Content

Tiny Bubbles :cheese:

Tiny bubbles in the wood,
make me happy, make me feel good,
tiny bubbles make me warm all over
with a feeling that I'm gonna love you 'til the end of time.

So here's to the golden moon,
and here's to the silver sea,
and mostly here's a toast to you and me!

It worked! First I checked the moisture content with my handy-dandy Cen-Tech moisture meter from Harbor Freight and found a freshly split piece of wood to be 15% to 18%. Then, I applied the liquid soap to one end and blew like the dickens.
After doing it a couple times tiny bubbles were quite visible. Next, I took a split that tested out between 27% and 35% (I don't know why they have such a jump at the end of their meter) and I could not get any bubbles to form even though I blew longer and harder.

I felt like a total goofball doing it but my wife got a good laugh out of it. :roll:

George

I am very impressed. One, that you had the stones to try it and two, that it worked. It might be like a snipe hunt or something but I will have to see it to believe it. If I do grow enough jewels to try this and by some stroke of luck it works then I will have discovered the ultimate party trick. Here ladies, lets have a blowing contest, let me get my wood.

Thanks for the info, I know that it works with dry wood. Just wondering at what moistue level it starts to work. Can ya try it once on month till that 27-35% wood dries out?? (man i'm too cheap to spend $20.00 buck on a moisture meter but I'm stupid enough to blow on my wood pile to see if its dry) go Figure!

Well, I make bubbles at 20%, and don't at 35%. Can't find any pieces in between those moisture contents. Damn white oak is still too wet and it's a good 1.5 years old split.

I tried the experiment I used two pieces of wood, one 1x6" about 7 inches long, pine board. It had 10.5% moisture in the center. I could not blow through it, so I drilled a 1/4" hole and inch or so deep and used 2 psi and shoved the wood in water. The only air I could see is coming out of the sides about 2" deep by the air chuck. Then I tried a small split, very dry, nothing happened this time, the air just came back out the hole. So I turned up the compressor to 100 psi, it just blew in my face. I say myth busted.

Not sure I'd by your test board - I don't see bubbles in either photo, but if the hose is blowing in where it shows in the first photo I would think the grain seems to mostly be coming out the sides near the chuck. not to mention BB's objections. I would think that the split under test should be something with reasonably straight grain - unless you're a kid, who wants to play with a "Krazy Straw"?

Gooserider

Well, all I can say is it did work with a regular piece of wood that I grabbed from the wood pile. My wife saw the bubbles form and I could still see them when I looked at the soaped end of the split. Regarding the test by Smokey, the pictures look like a piece of plywood was used — don't they use glue and several thin layers to make plywood? Im my mind that could prevent air from making it through the xylem and phloem cells of the wood. If I knew how to do pictures I'd take pictures and show you the tiny bubbles that formed. They really did, I am not just blowing smoke here. :lol:

George

That was a pine board with the grain, also used a split. My assumption is if you can blow through it when it's dry, an air chuck should easily have bubbles coming out of the bottom like an air-stone in a fish tank. Because this wood was dry it didn't work for me. This doesn't mean it doesn't work for your, in my mind it's not a reliable indication of dryness. I'll stick to my moisture meter.

How big was the nozzle on the air gun, that may have had something to do with it.
Also, putting the board in a tank means you have to exceed atmospheric pressue and that is more than 2 lbs.

Morso doesnt have that little tip on their website any longer............ they now sell a Morso digital moisture meter

It was a rubber tip, so I could apply plenty of downforce. I also used 100 psi just to see what would happen. Might have alot to do with what kind of wood your testing.

Any suggestions on a good moisture guage?

Oops, forgot about that other room

I think it's been said here before. Make sure you're on your knees and get as much wood in your mouth as possible when blowing.