this post was submitted on 14 Mar 2025
14 points (93.8% liked)

Explain Like I'm Five

15559 readers
3 users here now

Simplifying Complexity, One Answer at a Time!

Rules

  1. Be respectful and inclusive.
  2. No harassment, hate speech, or trolling.
  3. Engage in constructive discussions.
  4. Share relevant content.
  5. Follow guidelines and moderators' instructions.
  6. Use appropriate language and tone.
  7. Report violations.
  8. Foster a continuous learning environment.

founded 2 years ago
MODERATORS
 

Is it bad if my apartment doesn't get any drafts in it? I want to block the front door gap, but my dad got mad and said this would cause mold issues.

How and why? I mean I don't live there so why would it become humid?

It's not really an option to keep it open cause I'm allergic to some of the stuff that comes in from the neighbours

Follow up question: is it true that turning the bathroom fan on won't do anything, if there isn't somewhere outside the apartment that air can be drawn from?

top 14 comments
sorted by: hot top controversial new old
[–] FeelzGoodMan420@eviltoast.org 14 points 1 day ago* (last edited 1 day ago) (1 children)

All mold cares about is humidity. If relative humidity is over like 55-60% then mold will grow. That's it. Stale air and lack of airflow help to keep humidity high because air is not being circulated evenly. You can get pockets of high humidity in certain areas. So that will add to the chances of mold.

[–] AbouBenAdhem@lemmy.world 5 points 1 day ago* (last edited 1 day ago) (1 children)

Technically it’s a combination of absolute humidity and temperature. Bathrooms can be prone to mold even if they’re not any more humid than the rest of the house, because metal plumbing can conduct heat out of the room into the ground—causing the room to get cold enough for moisture to condense even if the water fixtures in the room aren’t in use.

[–] FeelzGoodMan420@eviltoast.org 3 points 1 day ago* (last edited 1 day ago)

Yeah, for sure. Relative humidity is influenced heavily by temperature so i kinda baked that into my answer haha.

[–] Delta_V@lemmy.world 4 points 1 day ago

Here's the book of standards for indoor air quality published by ASHRAE (American Society of Heating, Refrigerating, and Air Conditioning Engineers):
https://www.ashrae.org/File%20Library/Technical%20Resources/Standards%20and%20Guidelines/Standards%20Addenda/62-2001/62-2001_Addendum-n.pdf

And this is the relevant bit for this situation:

[–] constnt@lemmy.world 4 points 1 day ago (3 children)

Apartments and houses are designed for air flow. You don't need a gap in your door to prevent mold. Mold will grow despite that if you live in a city that has high humidity.

Everyone should watch for mold. Check around windows. Behind the toilet tank. Above and around the shower. Wipe with bleach often.

You can also get a dehumidifier if it becomes a problem

[–] AmbiguousProps@lemmy.today 4 points 1 day ago (1 children)

Bleach doesn't kill mold, and actually causes it to release spores. Use concrobium (or a similar product) to properly kill it.

[–] jlyndby@lemmy.world 2 points 1 day ago

I've heard vinegar is better at killing mold than bleach

[–] CrayonRosary@lemmy.world 4 points 1 day ago* (last edited 1 day ago)

Not bleach. Use mold control spray. Bleach doesn't kill the mold deep in the drywall, and sometimes not in the cracks of the paint.

[–] PlantJam@lemmy.world 3 points 1 day ago* (last edited 1 day ago)

I would get a dehumidifier before resorting to wiping with bleach often. If you ever see mold, you already have a humidity problem. This may be isolated to your bathroom due to extra moisture from showers, but it's still a problem that needs to be addressed. If it's just the bathroom, a new shower fan (or just using the existing one) could be enough.

[–] tiramichu@lemm.ee 2 points 1 day ago (1 children)

I don't understand what you mean when you say you "don't live there" ?

Regardless, if you consider mold in general then the room which most typically gets mild growing is the bathroom, because it's moist and warm which is perfect condition.

It doesn't take much to get mild growing in other places too though. If you have moisture in the air then mould could happen.

Good ventilation helps prevent mould because it lets the humid air created from normal activities like cooking and washing escape and be replaced with drier air from outside - assuming you live in a climate that doesn't have crazy humidity.

[–] jlyndby@lemmy.world 2 points 1 day ago (1 children)

As in, I don't live in the apartment, I'm living somewhere else currently. So, nobody uses any water, does any laundry, cooks etc. there.

So I don't understand how it could become humid inside my apartment.

[–] tiramichu@lemm.ee 1 points 1 day ago (1 children)

Fair :) But on that basis why are you wanting to block things off if neither you nor anyone else is living there?

[–] jlyndby@lemmy.world 2 points 1 day ago

That wasn't my question

[–] MomoGajo@lemm.ee 1 points 1 day ago

If a pipe breaks or just starts leaking or water comes in from a different apartment and you aren't there to catch it you can get mold.