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Old 11-17-2022, 08:44 PM   #1
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See where the studs are

Any idea why you can see where the studs are?
We didnít notice them earlier in the year.
Not sure if a good wash & wax will take care of it.
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Old 11-17-2022, 08:58 PM   #2
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Is it condensation or discoloring?
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Old 11-17-2022, 10:26 PM   #3
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Depending on temperature and humiditiy conditions I can see all of the studs on mine. Once the sun comes out and air temps warm the marks go away.
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Old 11-18-2022, 11:10 AM   #4
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Depending on temperature and humiditiy conditions I can see all of the studs on mine. Once the sun comes out and air temps warm the marks go away.
^^^This.

There's probably some scientific answer about the area where the studs are being warmer or colder and the fact that the trailer walls are really thin.

Nothing to worry about anyway.
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Old 11-18-2022, 11:17 AM   #5
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If this condition is temporary from condensation, consider this phenomenon a benefit in case you ever need to know where the wall framing is.
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Old 11-18-2022, 11:21 AM   #6
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^^^This.

There's probably some scientific answer about the area where the studs are being warmer or colder and the fact that the trailer walls are really thin.

Nothing to worry about anyway.

Not a tremendously scientific explanation but the studs are aluminum with styrofoam insulation in between. Metal and fiberglass are NOT good insulators so they will absorb the reflect heat or cold. Youíre likely seeing the aluminum stud absorbing warmth from inside and creating condensation frost from the cold on the outside.
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Old 11-18-2022, 05:17 PM   #7
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Your correct

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Youíre likely seeing the aluminum stud absorbing warmth from inside and creating condensation frost from the cold on the outside.
Condensation occurs on surfaces that are at or below the condensation temperature. Anyone familiar with the terms DRY BULB/WET BULB and RH (RELATIVE HUMIDITY) and DEW POINT?

Where the condensation occurred, the surface temperature was at or below DEW POINT. Where the condensation did not form, the surface temperature (DRY BULB) was above DEW POINT.

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Old 11-18-2022, 05:23 PM   #8
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Take a pic...so you know where the studs are!
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Old 11-18-2022, 05:40 PM   #9
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Originally Posted by simiHal View Post
Not a tremendously scientific explanation but the studs are aluminum with styrofoam insulation in between. Metal and fiberglass are NOT good insulators so they will absorb the reflect heat or cold. You’re likely seeing the aluminum stud absorbing warmth from inside and creating condensation frost from the cold on the outside.
Not quite. The aluminum is not creating frost. In the photo, the aluminum is creating voids in the condensation.

The aluminum is a better conductor of heat than the fiberglass and polystyrene behind it. The aluminum is conducting heat from the inside, resulting in slightly higher temperatures on the exterior where the framing is. This is creating voids in the surface condensation where the framing resides. The fiberglass/polystyrene backed surface is below the dew point. The fiberglass/aluminum backed surface is above the dew point.
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Old 11-18-2022, 05:49 PM   #10
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Take a pic...so you know where the studs are!
I usually do pictures and I'll even take measurements off of windows and whatnot.
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