answersLogoWhite

0


Best Answer

If it feels wet, you probably have a Plumbing leak.
It could be mold, also, which is another serious problem.

I would contact a plumber and have him look at it.

Hope this helps!

User Avatar

Wiki User

16y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is cause of dark stain on floor joist under house?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What would cause a fluro pink stain to appear on wooden floor?

kids!


How do you re stain a wooden floor?

In order to re stain a wood floor you must sand off all the existing finish. DO NOT try to apply stain over an already finished floor. It will not take. You can easily re coat your floor with clear polyurthane.


What is the best way to stain bathroom floor cabinets?

The best way to stain bathroom floor cabinets is to first sand the wood. After that, apply the wood conditioner, then the stain and finally apply the finish.


How do you get out pee stain on a vinyl floor?

If the stain is not too old, vinegar will lift most of it out.


Can you use floor wood stain on rifle stocks?

Wood is wood.


How do you stain a cement floor?

Please see the related link below.


Is it safe to have a wood floor in a babys room?

Yes, although it's important to stain and finish the floor first.


How do you tell if your house was stained with oil based stain or water based stain?

The color


Is wood stain or concrete stain better to put on tile floor?

Concrete stain would be your bestbet. But u need to treat the surface before you stain. Go to Home Depot or Lowe's and ask for the prep info.


How can you remove motar stain from new unfinished hardwood floor?

Unfinished hardwood floor easily absorbs moisture. To remove mortar stain on it, blot the stain with dry towel and sprinkle affected area with baking soda. Dip brush in white vinegar and scrub the stained area.


How can I repair a lightly scratched wood floor?

Usually, some varnish and finishing stain will fix scratches and nicks in a wood floor.


Will a flair pen stain cause your clothes to ripp?

Flair pen will not cause clothes to rip. It is possible that scrubbing the stain too harshly damaged the fabric. If you treat the stain gently, there is no reason that the clothing should rip.