3/4" 6" Wide Solid Oak Floor Install Help

 
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Old 12-25-2017, 03:54 PM   #1
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3/4" 6" Wide Solid Oak Floor Install Help


I am installing 3/4" unfinished natural 6" wide oak flooring in a new home I am building. I had planned to install like I have narrower oak flooring in the past with an underlayment and then L cleat nails, but I read in a recent Fine Homebuilding Magazine that they suggested a 4" wide strip of flooring glue every 18 inches or so for wide plank flooring that exceeded 5". What are thoughts on this? This would eliminate the use of underlayment.

I am in CO at 7500' elevations. House has 23/32 OSB floor sheathing on I joists 16 OC. little humidity to deal with here. House has radiant floor heat and an HRV system.
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Old 12-25-2017, 06:07 PM   #2
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Re: 3/4" 6" Wide Solid Oak Floor Install Help


The wider the plank, the more critical to keep balanced climate control. Swings in humidity will cause more chances for cupping. If wood wants to move due to moisture swings, no amount of glue is going to stop it from moving. Moisture barrier between sub floor & solid wood is crucial in wide plank because the softwood in subfloor, takes on & looses moisture at a different rate than hardwood floor.

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Old 12-25-2017, 09:12 PM   #3
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Re: 3/4" 6" Wide Solid Oak Floor Install Help


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Originally Posted by pinwheel View Post
The wider the plank, the more critical to keep balanced climate control. Swings in humidity will cause more chances for cupping. If wood wants to move due to moisture swings, no amount of glue is going to stop it from moving. Moisture barrier between sub floor & solid wood is crucial in wide plank because the softwood in subfloor, takes on & looses moisture at a different rate than hardwood floor.
But how do you account for a vb in a glue down situation? If it's over a crawl, would you vb somewhere between the bottom of the joists and the subfloor?

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Old 12-25-2017, 11:52 PM   #4
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Re: 3/4" 6" Wide Solid Oak Floor Install Help


This is the article I am referring to. You have to have an account to see the entire thing, but you can see the basic concept here.

http://www.finehomebuilding.com/2017...#comment-13919
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Old 12-26-2017, 02:02 AM   #5
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Re: 3/4" 6" Wide Solid Oak Floor Install Help


I wouldn't do 6" wide and OSB is not at all ideal either. Staples are proven to be stronger than cleats.
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Old 12-26-2017, 07:45 AM   #6
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Re: 3/4" 6" Wide Solid Oak Floor Install Help


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But how do you account for a vb in a glue down situation? If it's over a crawl, would you vb somewhere between the bottom of the joists and the subfloor?

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Many flooring glues are elastomeric &provide their own moisture barrier. We only use glue over concrete or with some engineered products.

Not all applications are suitable for wide plank hardwood. If I'm laying over unconditioned crawlspace, I try to steer my clients away from wide plank, but if they insist, I advise them of the added potential their floors cupping with swings in moisture.

Last edited by pinwheel; 12-26-2017 at 07:53 AM.
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Old 12-26-2017, 07:50 AM   #7
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Re: 3/4" 6" Wide Solid Oak Floor Install Help


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I wouldn't do 6" wide and OSB is not at all ideal either. Staples are proven to be stronger than cleats.
Lot of myth in this post. Every manufacturer of flooring I've laid, list osb as an acceptable subfloor. Most of the builders in this area use advantech. My experience of removing old hardwood floors, both staples & nails hold pretty much equal. Both leave a certain amount of nails in the subfloor. again, the manufacturers list both as acceptable fasteners per warranty.

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