Need to poly "both" sides of 9" wide plank douglas fir?

Old 02-08-04, 08:22 AM
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Need to poly "both" sides of 9" wide plank douglas fir?

I'm the guy wanting to install,stain and poly 80 year old doug fir planks (t&g) in my home. I was at a home show this week end talking to the owner of a hardwood "do it yourself shop"....sells poly,stain,rents equipment etc.. He claims that if I do not put at least one coat of poly om the back side of wide plank boards they will "cup or bow" slightly.

I've seen examples of this exact re-milled wood installed and I don't know if has been polyed both sides or not but it is not bowed. The 9" planks are gooved with two grooves running the length of the backside. The guy who sells the planks did indicate with wood wider that 5" that it should be face nailed every 12-16".

Any comments on this double sided poly thing? Thanks.

Old 02-08-04, 08:34 AM
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Location: Taylors, SC
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Finishing all 6 surfaces will keep moisture out. Finishing the back will go a long way to keeping cupping and such to a minimum.
Old 02-08-04, 09:50 AM
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Make sure there is no moisture in the wood before you go ahead and seal all sides

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