Hi, is there anyone here who's an expert on mold in the basement?
I recently bought the house and removed an old thick vinyl floor in the basement, since the plan is to lay tiles.
Today when I removed the flooring, I first saw a black spot in one place, and then when I removed more "picture no. 2" there was almost water dripping because it was so damp.
What do I do now and how do I proceed?
Involve the insurance company?
 
  • Concrete basement floor with mold and water damage revealed after removing old vinyl flooring. Hammer on the floor nearby.
  • Concrete basement floor with removed vinyl flooring, showing black mold spots and moisture. A hammer and level are visible on the side.
The insurance company will not do anything if there is a plastic mat in a basement.

Remove all the plastic mat and wash away the mold.
Then let it stand and air out, and most likely the water will disappear by itself. The plastic mat traps the moisture and it cannot go anywhere.

In the worst-case scenario, the water does not disappear, and then one must suspect that drainage is needed around the house.

Laying tiles is absolutely right as it allows the floor to breathe.
 
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RolfoHelena and 3 others
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K
R Roobiiiiin said:
Hello, is there any mold expert for basements here?
I recently bought a house and have removed an old thick vinyl floor in the basement, as the plan is to lay tiles.
Today when I removed the floor, I first saw a black spot in one place, and then when I removed more "picture no. 2" there was almost water dripping, that's how damp it was.
What do I do now and how do I proceed?
Involve the insurance company?
Pretty predictable? A sealed mat directly on the concrete in a basement is rarely a good idea.

I GUESS if the drainage works as it should and there is no reason to suspect leakage in sewage/drinking water pipes, then it's a matter of applying mold removal liquid, and letting the floor dry a bit before moving on?

Will follow the thread with great interest!
 
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Farstatjej90 and 1 other
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That is what I'm thinking too, the other rooms are dry. This is a hallway in the middle of the house, so no contact with exterior walls.
I suspect that there might be a water pipe there leading to an outdoor faucet.
 
K Kardan79 said:
Pretty predictable? A dense carpet directly on the concrete in a basement is rarely a good idea.

I GUESS if the drainage works as it should and there's no reason to suspect leakage in the sewage/drinking water pipes, then it's probably just a matter of using cleaning fluid, and letting the floor dry out a bit before you proceed?

I will follow the thread with great interest!
Yes, I suspect there's a leaking water pipe there. I'll have to plug it in the boiler room and let the dehumidifier run.
 
Today I have torn off the plastic carpet in another storage room and there was completely dry concrete underneath.
I also tried tearing off a piece of the carpet in the bathroom and it looks better there too, but there it is built up with levelling compound on the concrete as well, could there be moisture under the levelling compound?
 
R Roobiiiiin said:
Today I tore off the plastic mat in a storage room and there was completely dry concrete underneath. I also tried removing a piece of the mat in the bathroom, and it looks better there too, but it's built up with self-leveling compound on the concrete; could there be moisture under the compound?
I've now used mold-free and then sanded off the glue. Do I need to remove all the black stuff before tiling, or can it stay since the mold is dead?
 
  • Concrete floor with remnants of black marks and areas of sanding, possibly mold removal. The corridor is narrow with white doors on either side.
  • A concrete floor in a hallway, stripped of adhesive, showing remnants of black mold stains needing evaluation before tiling.
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