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Old 11-13-2011, 02:25 PM   #16
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Mold Growing on Hardwood Floors


I remember many many years ago, at least twice a year, I had to help in the "Redoing" of the hardwood floors in the house I grew up in, if I remember correctly this also took care of water stains.

Varsol, fine steel wool and Johnson's paste wax.

Pour varsol on the effected area and scour with fine steel wool, once clean apply wax. Now with the poly finishes, I would imagine it would be pour varsol on the effected area and scour with fine steel wool, stain to match color and finish with poly. Then scour with find steel wool to match sheen.

Mark

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Old 11-13-2011, 02:48 PM   #17
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Mold Growing on Hardwood Floors


I did exactly as tcleve4911 outlined above except I used a brush to apply the polyurethane and it blended very nicely with the surrounding floor.
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Old 11-13-2011, 06:02 PM   #18
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Mold Growing on Hardwood Floors


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Originally Posted by oh'mike View Post
That's not mold---Red Oak contains tanic acid--when exposed to water it will turn black---nature of the wood--
Red oak does not tolerate water---your finish is about shot---Consider refinishing the floors.

Use 3 coats----
I'm not sure what this means. So, the hardwood floor is red oak, which contains tanic acid and, therefore, will turn black when exposed to water? Once it's exposed to water, does it turn black permanently?
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Old 11-13-2011, 06:09 PM   #19
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Mold Growing on Hardwood Floors


Yep---that's why you need to sand as much as you dare--then oxalic acid used sparingly to lighten the stain.

I will be removing a few planks when I sand my floors as there a some boards where the stain will not sand out.
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Old 11-13-2011, 06:19 PM   #20
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Mold Growing on Hardwood Floors


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Yep---that's why you need to sand as much as you dare--then oxalic acid used sparingly to lighten the stain.

I will be removing a few planks when I sand my floors as there a some boards where the stain will not sand out.
I see. Following tcleve4911's instructions, would I apply the oxalic acid after I lightly sand with 220? Also, do I need to make sure the oil-based polyurethane matches the floor's color? Sorry to sound so clueless, but, I'm pretty clueless. I've never even thought about messing with this stuff.

Thanks for the quick responses and suggestions everyone.
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Old 11-13-2011, 06:45 PM   #21
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Mold Growing on Hardwood Floors


oxalic acid is sold in paint stores and is usually a powder---mixed as you need it---Very mild and safe to use.

The new work will be lighter colored than the old---a little bit of purital pine stain may be needed to add the missing 'patina'.--Mike---
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Old 11-13-2011, 09:28 PM   #22
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Mold Growing on Hardwood Floors


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Did you ever try that?

I had rotten luck---turned the wood a nasty yellow---I may have over done it----
Not sure what might have happened there, Mike. I've used it mostly on teak brightwork and oak furniture and haven't seen that particular problem. The most common thing I've run into is that it isn't always strong enough and I have to do repeat applications or go to a two part bleach.
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Old 11-13-2011, 11:55 PM   #23
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Mold Growing on Hardwood Floors


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Originally Posted by oh'mike View Post
oxalic acid is sold in paint stores and is usually a powder---mixed as you need it---Very mild and safe to use.

The new work will be lighter colored than the old---a little bit of purital pine stain may be needed to add the missing 'patina'.--Mike---
Thanks Mike! You're a real life-saver. I'm headed to Lowe's & Paint Store tomorrow and I'll let you guys know how it goes.
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Old 11-14-2011, 02:54 AM   #24
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Mold Growing on Hardwood Floors


Quote:
Originally Posted by oh'mike View Post
Yep---that's why you need to sand as much as you dare--then oxalic acid used sparingly to lighten the stain.

I will be removing a few planks when I sand my floors as there a some boards where the stain will not sand out.

Just flip em over( I am sure you thought of this but many HO would not and are out buying new wood)
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Old 11-14-2011, 05:33 AM   #25
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Mold Growing on Hardwood Floors


That wouldn't work,as it is tongue and groove and the planks will be destroyed in the removal---
And the backs aren't flat---

(besides---standard oak flooring is so cheap that there is little cost in using fresh clean product)
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Old 11-14-2011, 06:41 AM   #26
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Mold Growing on Hardwood Floors


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Originally Posted by ratherbefishin' View Post
Yeah, but did you guys forget that oak tannins can usually be bleached out with oxalic acid?
Good tip!!!!
Where do you buy that?????
Is it called something else? Like Tannin Bomb??? get it?? ....sorry.....
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Old 11-14-2011, 10:40 AM   #27
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Mold Growing on Hardwood Floors


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Good tip!!!!
Where do you buy that?????
Is it called something else? Like Tannin Bomb??? get it?? ....sorry.....
Ewwww....that was bad!
Now I know who took my Alvin and the Chipmunks Christmas CD.......
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Old 11-15-2011, 02:06 AM   #28
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Mold Growing on Hardwood Floors


Here's the polyurethane I got from Lowe's:



Is that right?
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Old 11-15-2011, 04:47 AM   #29
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Mold Growing on Hardwood Floors


That will work just fine----
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Old 11-15-2011, 01:43 PM   #30
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That will work just fine----
Awesome! Thanks Mike!

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