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Author Topic: What's wrong with my boards  (Read 4104 times)

Jimpa and 1 Guest are viewing this topic.

Offline kelLOGg

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Re: What's wrong with my boards
« Reply #20 on: July 05, 2017, 07:16:34 am »
I am sawing pine now for a customer and due to the humidity I am stacking and stickering on my trailer and moving the trailer to its shed to avoid getting wet from rain. I have put a fan on the trailer and for the first time I am using plastic sheeting to channel the air flow through the boards. The shed is quite low and it is difficult to see but the plastic is at the far end. So far there is about 200 bd ft of pine. I have been accumulating it for about 5 days. I can make draping of the plastic more effective if needed. We'll see.

 

 
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Offline WDH

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Re: What's wrong with my boards
« Reply #21 on: July 05, 2017, 07:34:52 am »
I was wondering if I stood the boards up after cutting the if they would dry better than stacking and stickering them?  They would definitely get more air flow.  it has been raining every day in Georgia and humidity is sky high.

Yes, but you have to have a lot of wall space to do that. 
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Offline flatrock58

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Re: What's wrong with my boards
« Reply #22 on: July 05, 2017, 09:14:33 pm »
WDH.  I have a 40 x 60 shed I just built.  I could stand up the boards along the side for a week or so and then maybe they would be dry enough to stack and sticker.  If I can get the plumbing done this week and get the slab poured, then maybe I will have power to run fans next month.  Seems like I got a lot more done in a day when I was working for a living!
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Offline Kbeitz

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Re: What's wrong with my boards
« Reply #23 on: July 05, 2017, 09:36:28 pm »
Make sure you flip your boards every day I you stand them up.
If you don't they will have a bow in them.
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Offline YellowHammer

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Re: What's wrong with my boards
« Reply #24 on: July 05, 2017, 10:53:02 pm »
The nice thing about pine is that it likes to dry fast, the faster the better.  Generally, I'll only put the big fans on a stack for a couple weeks, sometimes only a week, and it's past the danger zone, depending on how hot it is. 

I've never done the leaning trick, but I would be worried about them bowing too much while drying to be able to fix later by stickers.
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Offline Solomon

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Re: What's wrong with my boards
« Reply #25 on: July 06, 2017, 02:31:19 pm »
Mold. You need air circulation. You'd be better off outside but probably still need fans. Down here pine will mold overnight in summer.
I have had mold problems with SYP and Silver Maple  and I'm also in Virginia.
I have found White Pine to be a lot less prone to getting moldy or turning black
and I've had good results with WP but I may have gotten lucky.
 Thinking back, I can't tell you what the humidity level or the weather was the few times I've sawn WP.
 SYP seem to turn green if I don't take the board right off the mill straight into
the drying box with the fans running and I bleach it on the way in.
 I have about 1k  BF  of silver maple that's stained up pretty bad/good but I will
build some paint grade adirondack chairs or a country pantry that I can paint.
  A gallon of Kilz and a good quality satin  extierior latex will make a sawyer what he ain't !!!!
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Offline clintnelms

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Re: What's wrong with my boards
« Reply #26 on: July 06, 2017, 08:26:10 pm »
I had the same problem over the last two weeks with some 1x12 board and batten I cut.  I have them stacked in the new shed but there is no power so no fans.  I unstacked them and sprayed bleach, but like yellowhammer said that does not stop the moisture problem. 

I was wondering if I stood the boards up after cutting the if they would dry better than stacking and stickering them?  They would definitely get more air flow.  it has been raining every day in Georgia and humidity is sky high.

I'm in South Georgia myself and having the same exact problem. Gotta be this heat and humidity we're having. Luckily the boards I've sawn so far have been furring strips and other boards that will be covered. I sprayed them good with bleach and got a fan blowing on them good and it helped. Definitely gotta figure something out for the board and batten siding I'm fixing to start on.

Offline cwimer973

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Re: What's wrong with my boards
« Reply #27 on: July 06, 2017, 10:49:24 pm »
You know what they say about stopping a jelly fish sting...maybe worth a shot :)

On a serious note this thread will save others from the issue, so you are paying it forward with the 40 hrs in.  Not sure that helps but hopefully eases the pain a little.
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Offline Darrel

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Re: What's wrong with my boards
« Reply #28 on: July 06, 2017, 11:55:55 pm »
I read this thread and it makes me glad that I live where I do. I feel for you. Had that problem when I lived in Roseburg. But on the east side of the Cascades it's much dryer. Today the temp was 90 F and the humidity 12%.
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Offline fishfighter

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Re: What's wrong with my boards
« Reply #29 on: July 07, 2017, 07:07:26 am »
12% humidity? :D Down here in Louisiana at this time of the year it is around 75% all day and night. One's tee shirt sticks to you once you walk outside. :(

Offline Ianab

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Re: What's wrong with my boards
« Reply #30 on: July 07, 2017, 08:10:09 am »
75%, that's luxury...

I think we hit 80% today, as the low. Currently it's 92%. At least it's a cool, 46F.

Don't try and air dry pine around here at this time of year. Cold and humid enough that it wont dry, but not so cold the fungus and bugs wont get in there.

Summer you can dry pine, given a bit of air flow. Still  80% humidity of course.
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Offline clintnelms

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Re: What's wrong with my boards
« Reply #31 on: July 07, 2017, 08:18:01 am »
8:15 AM right now and it's 81 degrees and  87% humidity. Supposed to be a high of 95 degrees today with a heat index of 100 to 105. I need to move up north!

Offline fishfighter

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Re: What's wrong with my boards
« Reply #32 on: July 07, 2017, 08:38:51 am »
That 75% is about avg year round. Of course the heat index the last week has been well above 100F. :(

Offline redprospector

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Re: What's wrong with my boards
« Reply #33 on: July 07, 2017, 08:42:58 pm »
At 6:30 PM it has cooled down to 95 F at my mill. Humidity is about 15%.
Meanwhile, here at the house, it's a sultry 69 F with 30% humidity.
Lumber will dry pretty good either place.  ;D
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Offline Dewey

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Re: What's wrong with my boards
« Reply #34 on: July 07, 2017, 09:42:02 pm »
It all comes down to airflow....  Years ago I sawed 10'000 BF of Pine and stickered it all with just enough space to walk between piles in a fairly small area... the lumber on the outside piles dried fine, but the inner piles  stained allot..... I later started leaving at least 4' between piles on bunks 6"+ high and use dry stickers also sticker the lumber the day it was sawed ... one other thing that I think helps is when taking lumber off the mill thump the boards once on edge to knock any loose sawdust off that traps in moisture  .    I now saw Northern White Cedar the great thing there is no STAIN !!!

Offline clintnelms

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Re: What's wrong with my boards
« Reply #35 on: July 07, 2017, 09:48:20 pm »
It all comes down to airflow....  Years ago I sawed 10'000 BF of Pine and stickered it all with just enough space to walk between piles in a fairly small area... the lumber on the outside piles dried fine, but the inner piles  stained allot..... I later started leaving at least 4' between piles on bunks 6"+ high and use dry stickers also sticker the lumber the day it was sawed ... one other thing that I think helps is when taking lumber off the mill thump the boards once on edge to knock any loose sawdust off that traps in moisture  .    I now saw Northern White Cedar the great thing there is no STAIN !!!

None of that helped me this time. I use a broom and sweep off all the saw dust off both sides before stacking with 1 inch stickers out in the open and they still molded like that. We've had a lot of rain lately though. Guess that hasn't helped. The stack was covered with metal roofing panels too.

Offline YellowHammer

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Re: What's wrong with my boards
« Reply #36 on: July 07, 2017, 10:32:01 pm »
Mold needs surface moisture to grow, so the solution is to dry the surface of the boards as soon as possible.  This mold and stain issue is a significant one, and there are several papers written in the subject of drying soft and white wood, which is much different than drying conventional hardwoods. 

The drying effect of air velocity on lumber is proportional to how moist the wood is, and how fast the air is flowing.  The effect of air velocity decreases drastically as the wood starts to dry out.  High air velocities and wet wood result in very rapid moisture loss, heigh velocity air and drier wood, not so much. 

The solution is to get high airflow over the stacks as soon as it is milled and use H style stickers.  Typically, I can dry a load of pine out of the danger zone, with the big fans, in about a week, two at the most, in Alabama summertime. 

You don't have to worry about sawdust, when the fans fire up, a cloud will cover anyone downwind.  Thats when you know you have enough airflow.

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Offline Peter Drouin

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Re: What's wrong with my boards
« Reply #37 on: July 08, 2017, 06:12:57 am »


You don't have to worry about sawdust, when the fans fire up, a cloud will cover anyone downwind.  Thats when you know you have enough airflow.






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Re: What's wrong with my boards
« Reply #38 on: July 08, 2017, 06:57:37 am »
lol lol lol lol




 Now what if theres sawdust under the sticker, more possibility of sticker stain eh?
Wait til you get to be my age

Offline YellowHammer

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Re: What's wrong with my boards
« Reply #39 on: July 08, 2017, 08:48:12 am »
Yes, so the H stickers will trap almost very little sawdust under the contact area, especially is they were made on a molder and have a radius on the tips. 
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