Home>Discussions>INTERIORS>Molding & Carpentry>Oak floor cupped, when OK to sand? Moisture Content 10%? 14%?
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DieselOx
Oak floor cupped, when OK to sand? Moisture Content 10%? 14%?
DieselOx

Well, we left for Thanksgiving, and came back 4 days later to my son's aquarium constant water change system having leaked on the floor for up to 3 days. We've had the heat up for a couple weeks, and the cupping has gone down considerably. I'm afraid to re-finish too soon, I don't want reverse cupping in a year.

This is our 90 year old 5/16 inch thick oak strip flooring, over fir t and g.

Our undamaged floor in other parts of the house reads 9% moisture content. The damaged floor is about 10.5% on top, 14% in the gaps between the boards.

My neighbor has a floor sander, I'm ready to go anytime.

Anyone have any experience with moisture content? I've refinished many floors, no problem with that part. I've never had the pleasure of dealing with fresh water damage though. Thanks.

DieselOx
Re: Oak floor cupped, when OK to sand? Moisture Content 10%? 14%?
DieselOx

trying to post photo, can't get it to work....

MLB Construction
Re: Oak floor cupped, when OK to sand? Moisture Content 10%? 14%?
MLB Construction

rule of thumb is for flooring to be between 5-10% moisture....you're almost there

DieselOx
Re: Oak floor cupped, when OK to sand? Moisture Content 10%? 14%?
DieselOx

Perfect, thank you. Love having to put this off. Maybe it will be ready the week after Christmas when my Brother in Law is here.

Mastercarpentry
Re: Oak floor cupped, when OK to sand? Moisture Content 10%? 14%?
Mastercarpentry

Especially if Brother-in-law is good with a sander!

Phil

Re: Oak floor cupped, when OK to sand? Moisture Content 10%? 14%?

I am agree with MLB Construction that rule of thumb is for flooring to be between 5-10% moisture. Wood is a natural product that lives in a comfort zone of 35% - 55% relative humidity, and between 60 and 80 degrees Fahrenheit.

Sombreuil_mongrel
Re: Oak floor cupped, when OK to sand? Moisture Content 10%? 14%?
Sombreuil_mongrel

If you go to town on old 5/16" strip flooring with a drum sander, there isn't going to be much left when you get done. I would use a paint scr-aper and a random-orbit sander on a thin material like that (as I have done many times in the past).
Be patient and wait for the moisture to match the unaffected area.
Casey

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