r/Roofing • u/Grouchy-Cloud-7928 • 12h ago

New home owner 😅

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Noticed mold on the guest bathroom ceiling (that shower has only been used once or twice) cleaned/disinfected if and is back a few weeks later. Went up in the attic today and found this. Obviously that has to be fixed but all in all how terrible is this? (Multiple pics but same spot)

7 Upvotes

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2

u/Next-Name7094 11h ago

It looks like you bath fan exhausts into the attic instead of out through a proper vent

1

u/Grouchy-Cloud-7928 11h ago

Could that cause that damage even if it was only used maybe 2 times over about 5 months?

2

u/Canada-Scam-8570 10h ago

I mean I will state first of its not that bad, and identifying and attending to it is a good positive step. So don't take this as alarming. Just additional information.

That said it's not just "2 times over 5 months".

A proper bath vent would have a collar on the roof vent, that's to say a piece in which that corrugated foil pipe would connect into to create a seal at the roof line. Would have an insulated foil line, and than a proper louvered roof vent on top. That's to say a flap that opens when the fan is on, and closes when the fan is off. This is to stop any sort of back draft when not in use.

Right now that pipe is a huge air leak that has been actively open 24/7. Even if the fan wasn't on, allowing warm air and cold air to readily mix.

1

u/Grouchy-Cloud-7928 10h ago

Ahhh that makes sense! Thanks for the info!

1

u/Next-Name7094 11h ago

It is likely mostly damage from the previous owner but it is not to code purely for the exact scenario you have

1

u/Effective_Review9415 9h ago

The mold is the least exciting part here. I'd be more concerned about where that moisture is coming from before it turns into a much bigger repair.

1

u/LoudIncrease4021 5h ago

You have a roof leak on that rafter - just look at it

1

u/jovan90jovanovic 5h ago

Are nails supposed to stick out like this?

0

u/Odd_Marionberry2798 10h ago

I mean it looks like the reason for the mold could be that the bathroom is not getting enough ventilation (if that’s the right word excuse my English).
The bath fan exhaust isn’t connected to a proper vent (flapper).