Help! Hardwood floors

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Forum topic by Machinehead posted 06-10-2019 01:51 AM 389 views 0 times favorited 8 replies Add to Favorites Watch
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1 post in 39 days

06-10-2019 01:51 AM

Topic tags/keywords: flooring

I recently bought a house with a horrible looking carpet, pulled it back to see some hardwood floors that didnt seem in too bad of shape. Ive never worked on wood anything really, my trade deals with steel. After about 16 hours of vigorous work its starting to look nice, but i noticed in both room there is a darkened square that no matter how much i sand it stays. Is there a way for me to get the color neutral or am i doomed to have darkened squares on my finished floor?

8 replies so far

View tomsteve's profile


958 posts in 1637 days

#1 posted 06-10-2019 11:28 AM

did you use a drum sander to sand or just the pad sander?

View ibewjon's profile


679 posts in 3211 days

#2 posted 06-10-2019 12:46 PM

Have a pro do the sanding and finishing if possible. I have seen several people rent a belt sander and destroy the floor.

View LesB's profile


2123 posts in 3861 days

#3 posted 06-10-2019 10:25 PM

Without some experience I agree that you should seek help from a professional floor finisher. Sanding is tricky. Besides the main area you need special sanding tools to do around the edges and scrapers for the corners. You can rent these tools if you really want to DIY.
You said you worked on it for 16 hours. What did you do during that work time???? Sand it, just clean it, or what?

That said. If you have removed the finish on the wood and the discoloration is still there you could try “bleaching” that area. Try some household bleach in an inconspicuous spot to see if that works….even just a little. If it does then you will need to bleach the whole floor to get it all the same. There are commercial wood bleaches including Oxalic acid, sodium hypochlorite and a couple of others. and as usual lots of videos on the internet on how to do it. If you want more color back after the bleaching you can use a stain. Here is one web site with instructions.

-- Les B, Oregon

View pottz's profile


5550 posts in 1402 days

#4 posted 06-10-2019 10:30 PM

Have a pro do the sanding and finishing if possible. I have seen several people rent a belt sander and destroy the floor.

- ibewjon

i agree it’s just not something for a rookie to attempt especially with the situation you dont want to look at a mistake everyday and regret it.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View Knockonit's profile


584 posts in 620 days

#5 posted 06-10-2019 10:33 PM

it had a mat or pad or something that bled into the flooring, gonna be a tough one to resolve best of luck

View TravisH's profile


676 posts in 2353 days

#6 posted 06-11-2019 02:27 AM

Dark spots almost always pet urine or water damage (tea, beer, kids milk, fish tank). I have repaired a few floors (DIY homeowner not a pro). The usual tricks are vinegar, hydrogen peroxide, and water/bleach solution. Might take several treatments to get the desired effect. Usually try vinegar first then progress down the line of treatments to get the desired out come.

Can also at times salvage wood from a closet and patch it in. Have done this a few times with very good results especially if sanding/staining the entire floor.

If all else fails one reason you see a lot of dark stained floors. Really depends on the floor and the stain however. Have come across some refinished failures where the bulk of the floor is really nice and then you have black splotches here and there. Always best to try and remove stain first.

View therealSteveN's profile


3084 posts in 992 days

#7 posted 06-11-2019 03:31 AM

Dark spots almost always pet urine or water damage (tea, beer, kids milk, fish tank).
- TravisH

This is likely true. Both can stink, so don’t put a lot of stock in that. But if you have pets, they will make a beeline to try to pee on it to put their own scent down, if it is urine. They will likely ignore the area if it’s water. Another sure fire way to check is if you look at the ceiling right over the spot….. Does it look like the ceiling was repaired, or maybe it’s still rough?

Old school fix was using Hydrogen Peroxide, spill out enough on a clean rag over the spot, allow it to work in, then just wipe up the damp. You will find a lot of staining on the clean rag. Today they have an entire industry on cleaning up old buried under carpet, hardwood floors. Most of them will have the word Rejuvenator, rejuvenation, or Transformation, something saying it is going to magically change the floor to new looking and beautiful. I have not used any of these, so don’t know if they are in fact better than Peroxide.

As you may know peroxide can cause blonding, white spots, and other leeching of color, so always do that inconspicuous spot, or if not having one of those, start with very small amounts.

Some times this is deeper than you would think, so sanding often doesn’t go deep enough. If you can clean it up, if you do need to sand, it always looks more uniform if you do the entire thing. Trying to patch, sand, clean, here and there leaves a lot of tell tale marks.

I have not used Vinegar on these, might work, outside of it’s own odor, not much risk. I would use that on metals, not sure about woods. Also a few of the newer age clean all’s, are of all things, Peanut Butter, Toothpaste, and WD-40, all with a buttload of elbow grease.

-- Think safe, be safe

View Ripper70's profile


1288 posts in 1327 days

#8 posted 06-11-2019 03:50 AM

Stain the floors to a shade just darker than the darkest areas. Or, as suggested above, hire a pro.

-- "You know, I'm such a great driver, it's incomprehensible that they took my license away." --Vince Ricardo

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