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How long does wood take to acclimate?



"How long does wood take to acclimate?," in the Hardwood and Laminates Q&A forum, begins: "How long does wood take to acclimate? I received it last night. By the way I received my flush mount ..."

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Old December 12, 2008, 07:28 AM   #1
davesaint86
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How long does wood take to acclimate?


How long does wood take to acclimate? I received it last night.


By the way I received my flush mount vents yesterday. I'm not an expert on vents but the quality of the vents seem excellent and their prices seem reasonable. Below is their website McGregors Wood Tech Hardwood Flooring Product Hardwood Floor Register Wood Floor Vent Wood Vent Register. I paid with shipping $27.50 for each 4X10 maple vent with dampers

Thanks,

Dave

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Last edited by Jim McClain; September 3, 2012 at 05:36 PM.
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Old December 12, 2008, 08:05 AM   #2
Tandy Reeves
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Re: How long does wood take to acclimate?


Moisture content in wood is not a time thing. You need a moisture meter not a clock. When the wood gets within 2% to 4% of the sub floor then it is ready to be installed. I like nearer to 2%. Each location has its own environment and the wood must acclimate to that environment.

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Old December 12, 2008, 09:24 AM   #3
Peter Kodner
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Re: How long does wood take to acclimate?


Ditto to what Tandy has stated. Leave the wood in the shipping packages- it is better to have it acclimate slower and not have a rapid shock of MC change. Do not stack the cartons too high- 3-4 max. Stage the wood in the areas it will be installed in. Do not let it sit where it will be in direct sunlight from a window.

Measure each strip you take MC (moisture content) readings in in several locations (you can stab the backs of the boards). Take readings with the grain direction, not across.

Wider boards, i.e. over 3 1/4 strip or exotics species should be within 2% of subfloor. Domestic 2 1/4 or 3 1/4 strip can go in at 4%.

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Old December 12, 2008, 01:53 PM   #4
Kman
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Re: How long does wood take to acclimate?


Guys, I know we've discussed this before in another thread, but if the boxes are shrink- wrapped, isn't it better to remove the plastic to allow the wood to better adjust to the humidity of the installation location?

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Old December 12, 2008, 02:13 PM   #5
Tandy Reeves
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Re: How long does wood take to acclimate?


If it was my wood I would and spread it in the rooms where it would be installed on 2" X 4"'s. and not the concrete floor.

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Old December 12, 2008, 02:40 PM   #6
Jerry Thomas
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Re: How long does wood take to acclimate?


What is the width of the maple and is it a solid? Domestic or a Chinese import?

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Old December 12, 2008, 05:45 PM   #7
Peter Kodner
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Re: How long does wood take to acclimate?


Kman said View Post
Guys, I know we've discussed this before in another thread, but if the boxes are shrink- wrapped, isn't it better to remove the plastic to allow the wood to better adjust to the humidity of the installation location?
I agree off the record. If it was my own, I'd at least cut slits it in several areas and probably would remove the shrink wrap. Best to read the labels though.

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Old December 12, 2008, 07:58 PM   #8
steve h
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Re: How long does wood take to acclimate?


Good evening gentlemen you all have covered everything. But one thing nobody has talked about is making sure that the AC/heat is up and working properly. Should be kept between 60 and 80. And every day keeps checking the moisture content in the world.

HAVE A GREAT DAY

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Old December 13, 2008, 06:13 AM   #9
Floorguy
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Re: How long does wood take to acclimate?


I personally don't like to acclimate wood to the dry heating season.

I walked into a jobsite yesterday and took some ambient air conditions. The humidity because of the heater was 22%rH. Acclimate the wood, or bamboo to that and install it tight, and see what happens during April or May as the heaters are no longer in use and the humidity rises inside to 40-50%.

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Old December 13, 2008, 08:17 AM   #10
Country Flooring Direct
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Re: How long does wood take to acclimate?


Floor Guy makes an interesting point. I leave the wood on the job for 48-72 hours before installation that is what the mill says that is what I do. The humidity should be at 40-50% and the heat or air temp should be between 60-80 degrees f.

The only time this bit me is in michigan it went from 60 farenheight and raining to 5 and snowing in a couple of days I delivered it 3 days prior to install installed the wood sanded and finished it then the weather changed and the wood gapped up by the air ducts. I had already informed the customer they needed to regulate the humidity with a humidifier dehumidifier but they didnt like the look of one. The gaps were only where the air ducts were and the vents.

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Old December 13, 2008, 08:47 AM   #11
Tandy Reeves
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Re: How long does wood take to acclimate?


CFD you make a lot of assumptions. How long are you going to let it set? Pick only one. What R/H are you going to pick? Pick only one. At what temp. are you going to install. Pick only one. Remember in the real world you don't get a range of conditions.

How close to the sub floor M/C are you? You are dealing with two different surfaces, and they must go together properly or there is a good chance you will get lucky and it will work or a good chance it will fail. I know nothing about gambling, but are those good odds in Vages?

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Old December 13, 2008, 09:02 AM   #12
Country Flooring Direct
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Re: How long does wood take to acclimate?


Tandy,

I am not saying you are incorrect because you are correct. One way to answer the question is the way you answered it and it is more in depth than the way I answered it. Floor guy brought up the point that you bring the wood in to acclimate it in the winter when its dry and the wood is more moist than the home when the weather changes you could get buckling. I think that is interesting, I have checked the moisture content in the subfloor and in the wood before installing and then the weather changed and I had huge gaps where the air ducts were strictly because of the weather changing so dramatically. So all I am saying is depending on how you look at the situation could dictate your response. You say dont install it when the floor and the wood does not have an acceptable variance, true. The mill says leave the wood on the site for at least 48 hours this is true. Floor Guy says acclimating the wood when its dry can be a problem because the wood may cup when the weather changes this is true. So the customer is asking, and we have to think from his view point how long to acclimate the wood. And we have to give the customer an answer that they will understand. It is easiest to understand 48-72 hours with the heat on your normal amount and the humidity should be kept between 40-50%. Unless they have a moisture reader and know how to use it saying within 2% of the subfloor, although very good and sound advice, may be useless to the customer.


Last edited by Jim McClain; September 3, 2012 at 05:37 PM.
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Old December 13, 2008, 09:12 AM   #13
stullis
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Re: How long does wood take to acclimate?


Floorguy said View Post
I personally don't like to acclimate wood to the dry heating season.

I walked into a jobsite yesterday and took some ambient air conditions. The humidity because of the heater was 22%rH. Acclimate the wood, or bamboo to that and install it tight, and see what happens during April or May as the heaters are no longer in use and the humidity rises inside to 40-50%.

There you go using your brain instead of following the "book" anwers Perry.

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Old December 13, 2008, 03:29 PM   #14
Floorguy
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Re: How long does wood take to acclimate?


Before HVAC, how did they do it?? LOL!!!!

The key... Each species of wood has a shrink & swell number associated with a gain or loss of MC.


Scott, that is by the book!!!! Page 12 & 13 of the water & wood chapter.

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