Refinishing Problem With Hardwood Never Seen Before

wayne3434

im refinishing an old hardwood floor ive completed all sanding and noticed one spot had this black tarlike substance seeping up through tiny hole so i wiped it up and it stained like it was tar or oil so i sanded it down. today i went back and a lot of that **** seeped up i have never seen this in my life has anyone any idea what it could be and what i could do to stop it?

mdshunk

Artesian oil well?

OCRS

Do you have access to the underside of the floor?

mdshunk

Pitch Pocket: 1. A defect in wood; consists of an opening in the grain that contains pitch or resin. Also called a resin pocket.

Teetorbilt

New to me. Some of the old guys used to use roofing felt under hardwood. Usually it just dries up.

You may have problems outside of the flooring.

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rbsremodeling

I still use the roofing felt if the moisture below the floor is high. It seems to work better than the cheap a55 rosin paper

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Floordude

It may very well be cutback tar adhesive, residue.

The sanding heated it up and it is wicking up, is a possibility.

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wayne3434

thanks guys its only seaping up from one piece of flooring i wiped it up and sanded stain off but is still coming up what do u think i could do? what if i sand it and then seal it before it starts seaping up again?or i could replace the one piece of wood.

csheafer

Are you talking about sealing just the one area or the whole floor?
If you are talking the whole floor, I think that would be a mistake.

I think that replacing that one plank would be the best option.

OCRS

If you have access, have you looked at the under side of the floor? Trying to seal the floor will probably only result in the finish lifting.

Mike Costello

Black gold. Texas Tea