Amish made hardwood

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 Post subject: Acceptable variance in thickness of wood above the T&G
PostPosted: Mon Aug 26, 2019 9:57 am 
New User

Joined: Mon Aug 26, 2019 9:33 am
Posts: 1
First time poster here. I'm a GC and have locally source and milled about 1,300 sf of antique reclaimed heartpine flooring for a customer. The material was milled at 3 thicknesses - 5, 7, and 9 inch by 3/4 thick. We have installed the flooring in a existing 1960 house over 1x6 diagonal subfloor which is structurally sound.

The issue is that there is a variance between adjacent boards where they where the T&G meet so that some boards are higher/lower by as much as 1/8 inch. I know that this can be sanded out but the homeowner is refusing to accept that we will have to sand out the high areas. I would post a picture but I can't figure out how to.

Is there a standard acceptable variance is this situation? I've got $21,000 worth of heartpine that he is saying he won't accept. My next step is so have a certified inspector from the NFWA come and give their assessment.

Thanks in advance for any comments or insight.


 Post subject: Re: Acceptable variance in thickness of wood above the T&G
PostPosted: Tue Aug 27, 2019 7:08 am 
Worthy Contributor

Joined: Tue Nov 28, 2017 8:02 am
Posts: 125
Depends on where you live, in Ontario we have a building code and a 3rd party warranty rep (Tarion) that allow up to 6mm up or down from a specified plane. Typically the threshold for overwood/underwood is 2mm, by NWFA standards.

I had a similar situation with a pre-finished product that came from Europe once, the milling was slightly off and the east facing wall of the house was all windows, so in the morning, the sun would cast little shadows where the boards were higher and it really stood out, even though the boards were only about 2-4mm up or down. Couldn't sand so at the end of the day we went with individual boards replacements on some of the worst offenders, and a carefully planed and stained some of the more mid-range offenders. Then we oiled the the whole thing to raise the gloss a bit, which helped take the eyes away from the slight imperfections, which was enough to get the sign off.

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