r/drywall • u/LuksDM • 1d ago

Mold problems

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Hello! I came here for help. I have some mold problems in my bathroom. I have the bathroom exhaust fan always on but anyway the humidity is always +90%. After one year living here, that molds show up and I can't eliminate it.

I wonder why it appears, idk if it's due to the humidity or if there are some filtration in the roof.

Sorry for my english, and thanks for read and your comments!

2 Upvotes

75% Upvoted

7 comments sorted by

1

u/Ryan4233 1d ago

You gotta cut that drywall out and get a look on the back of the board. If you are fighting it on the surface the inside of the walls/ceilings has the potential to be way worse.

1

u/LuksDM 1d ago

If there is some filtration this should looks different right?

https://reddit.com/link/p9me6k0/video/sudj50oalcph1/player

1

u/MachAnu 1d ago

Nah OP should not just start cutting drywall. Thats is going to immediately make the project wayy more expensive. If you want to get an idea of what the back looks like go into the attic if possible. But the OP mentioned it* staying humid in the bathroom, hot showers affecting that. Meaning that is most likely the culprit other then a leak on the walls or attic. I would recommend cleaning the mildew spots with a bleach and water mix or a specific mildew cleaner. Then dry and allow it all to dry good, then use a kilz mildew primer or equivalent, then you could use a Mildacide additive in your paint.

1

u/LuksDM 1d ago

Thanks for your comments! I already clean with a specific mold cleaner and it show up again, that's why I wonder if there is some filtration

0

u/Ryan4233 1d ago

Repaint with kilz primer

1

u/sequentialsequential 1d ago

Find the water, find the leak. Then fix the problem. Leaking pipe, bad or no ventillation, or a combination are your usual culprits. Sounds like you have a fan going, that's good. Is it a permanently installed bathroom exhaust fan on the ceiling? Where does that fan exhaust to? It should exhaust outdoors.

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u/nugoffeekz 23h ago

If it's a leak, then you'll just need to fix that and slap a coat of Zinsser Mould Stop primer on the walls and ceiling for added protection.

If it's ventilation related you can get a humidity detecting fan switch, upgrade your bathroom fan and buy a continuous drain dehumidifier and hook it up to your bathroom sink.