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Strange Stud Shadows On Interior Walls

 
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Old 01-10-2010, 12:01 PM   #21
 
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Re: Strange Stud Shadows On Interior Walls


They are using one of those portable ionizer "air fresheners" that ionize air molecules. The denser materials are receiving a slight charge and are attracting dirt.
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Old 01-10-2010, 12:10 PM   #22
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Re: Strange Stud Shadows On Interior Walls


It's thermal bridging.

There are seveal things that cause it and even more things you can do to fix it. If it can be completely corrected.
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Old 01-10-2010, 12:10 PM   #23
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Re: Strange Stud Shadows On Interior Walls


how do you post pictures
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Old 01-10-2010, 01:00 PM   #24
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Re: Strange Stud Shadows On Interior Walls


Quote:
Originally Posted by ubenhad4 View Post
how do you post pictures
with the post a picture button
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Old 01-10-2010, 01:09 PM   #25
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Re: Strange Stud Shadows On Interior Walls


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Originally Posted by CHB70 View Post
I have a customer who thought they had some water damage. I went to check the roof, but when I arrived they showed me the problem on the inside walls.
Every place there is a stud on outside and inside interior walls they have shadows showing the stud outline. I have a pic attached

https://www.contractortalk.com/attach...1&d=1263141540
Google "thermal bridging."
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Old 01-10-2010, 09:33 PM   #26
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Re: Strange Stud Shadows On Interior Walls


i've seen this before as well.......it was in a haunted house ...it wasn't thermal anything..it was THE DEVIL !!!!
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Old 01-10-2010, 09:37 PM   #27
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Re: Strange Stud Shadows On Interior Walls


Ding ding ding

Only Warner and Neo got this right.
that is exactly what this is and considering the OP's location I would suspect a little too much humidity in the house too.
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Old 01-10-2010, 09:46 PM   #28
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Re: Strange Stud Shadows On Interior Walls


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Thank you Alex Trevek...............
its Trebek i think your thinking of Alex tyvek
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Old 01-10-2010, 09:46 PM   #29
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Re: Strange Stud Shadows On Interior Walls


A good article on thermal bridging and ghosting.

http://www.carlisle-syntec.com/docum...alBridging.pdf
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Old 01-10-2010, 09:48 PM   #30
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Re: Strange Stud Shadows On Interior Walls


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Ding ding ding

Only Warner and Neo got this right..

they are so smart
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Old 01-10-2010, 09:51 PM   #31
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Re: Strange Stud Shadows On Interior Walls


I have seen similar things with screw heads in wood or metal studs and along baseboards. With the screw heads I could see some sort of static charge. The base problem eludes me.
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Old 01-10-2010, 09:54 PM   #32
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Re: Strange Stud Shadows On Interior Walls


you can see it sometimes too on vinyl siding,with the right conditions you can see where the nails are by the condensation
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Old 01-10-2010, 10:07 PM   #33
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Re: Strange Stud Shadows On Interior Walls


The higher thermal conductivity of the frame members reduces the temperature of the wall surface. The cooler wall surface absorbs thermal energy of adjacent air molecules. The water vapor fraction of the air gas mixture is condensed from gas to liquid due to the reduction in kinetic molecular energy. The polarity of water molecules makes it the universal solvent with opposite ends of the molecules attractive to positive and negative ions of assorted fine particulate matter present in the air. This results in an accretion of dust.

Cheers,

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Old 01-10-2010, 10:13 PM   #34
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Re: Strange Stud Shadows On Interior Walls


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The higher thermal conductivity of the frame members reduces the temperature of the wall surface. The cooler wall surface absorbs thermal energy of adjacent air molecules. The water vapor fraction of the air gas mixture is condensed from gas to liquid due to the reduction in kinetic molecular energy. The polarity of water molecules makes it the universal solvent with opposite ends of the molecules attractive to positive and negative ions of assorted fine particulate matter present in the air. This results in an accretion of dust.

Cheers,

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Thank you professor Basswood, for that well thought out and informative post.
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Old 01-10-2010, 10:18 PM   #35
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Re: Strange Stud Shadows On Interior Walls


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Originally Posted by loneframer View Post
Thank you professor Basswood, for that well thought out and informative post.
Also known as "Ghosting due to Thermal Bridging."

Cheers,

Bass
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Old 01-10-2010, 10:24 PM   #36
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Re: Strange Stud Shadows On Interior Walls


Quote:
Originally Posted by basswood View Post
The higher thermal conductivity of the frame members reduces the temperature of the wall surface. The cooler wall surface absorbs thermal energy of adjacent air molecules. The water vapor fraction of the air gas mixture is condensed from gas to liquid due to the reduction in kinetic molecular energy. The polarity of water molecules makes it the universal solvent with opposite ends of the molecules attractive to positive and negative ions of assorted fine particulate matter present in the air. This results in an accretion of dust.

Cheers,

Basswood
Thats what I was gonna say. Dang you Bass you plagiarized my post! (wow plagiarized is hard to spell!)
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Old 01-10-2010, 10:35 PM   #37
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Re: Strange Stud Shadows On Interior Walls


heres those ghosts frozen
Attached Thumbnails
Strange Stud Shadows on interior walls-100_9758.jpg  
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Old 01-10-2010, 11:03 PM   #38
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Re: Strange Stud Shadows On Interior Walls


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Thats what I was gonna say. Dang you Bass you plagiarized my post! (wow plagiarized is hard to spell!)


I knew you were going to say that... so I just had to beat you to it.

Later man,

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Old 01-10-2010, 11:06 PM   #39
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Re: Strange Stud Shadows On Interior Walls


Quote:
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The polarity of water molecules makes it the universal solvent with opposite ends of the molecules attractive to positive and negative ions of assorted fine particulate matter present in the air.
Professor: How can I tell which end of a molecule I'm looking at?
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Old 01-10-2010, 11:07 PM   #40
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Re: Strange Stud Shadows On Interior Walls


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Professor: How can I tell which end of a molecule I'm looking at?
just look in the genes!

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