Cold room ceiling condensation??

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Old 10-31-18, 02:28 PM
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Cold room ceiling condensation??

I have condensation on my cold room ceiling and
its only 5 degrees celcius here ....

what's the best way to prevent this.

1. Due to code reasons no Rigid foam is allowed.
2. The vent is currently stuffed with rags. I guess I should remove that .
3. Door has draft seal but is a hallow door . Will a metal or solid door actually help much
4. Of i do spray foam . How should I do entire walls or just the wall section above ground level and the ceiling
 

Last edited by wantboost; 10-31-18 at 03:14 PM.
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Old 10-31-18, 04:39 PM
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Your code probably allows for Thermax to be used. (Its fire rated). Glue 2 layers of 2" Thermax to the ceiling and seal all edges with pl300 or similar. Tape joints with foil tape. You need to prevent any interior air from contacting that surface.
 
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Old 10-31-18, 04:51 PM
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I cannot find the equivalent here in cananda.....
how about rockwool 80 ?

also do the wall area above grade need to be covered too ??

I guess it's best if i unplug that vent ??
 
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Old 11-01-18, 02:33 AM
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I have condensation on my cold room ceiling
Please define what a cold room is and it;s construction/location relative to the primary structure!
 
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Old 11-01-18, 04:21 AM
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The vent is how moisture from the room escapes and needs to be open.

You should make sure that the seal on the entrance door is airtight to prevent moisture from the house making it's way into the room.
On a cold room you would need some insulation to prevent the room from freezing.
I have seen older cold rooms with a vent and an additional adjustable flap to be open in warmer and closed in colder temps.

More important than adding insulation is a vapor barrier on the inside wall surface to prevent humid air from condensing on the cold surface.
 
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Old 01-19-20, 05:13 AM
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i going to upgrade the cellar door , currently its a hollaw door, whats the insulating difference between a solid wood door and a metal insulated door....trying to stop the room warm from entering the cellar also...
 
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Old 01-19-20, 05:47 AM
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Just install an exterior door!

You never fully explained the construction of your room, sort or WAG not knowing how it;s build!
 
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