Dave Hahn
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Airflow "through" a building or "beneath" the exterior cladding

Started this discussion. Last reply by Tom Mallard Apr 14. 3 Replies

As a licensed home inspector in the southeast, I have observed residential structures (typically 15 - 25 years old) clad with vinyl lap siding that have particulate matter deposited at some of the…Continue

Tags: Envelope, Building, Airflow

 

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Airflow "through" a building or "beneath" the exterior cladding

As a licensed home inspector in the southeast, I have observed residential structures (typically 15 - 25 years old) clad with vinyl lap siding that have particulate matter deposited at some of the overlapping seams of the siding (see photos). This is typically observed on one side - presumably the leeward side.I've been of the impression that these “puff-like” markings are likely the result of dirt depositing on the siding from the movement of air in the space behind the siding due to changes…See More
Tuesday
Tom Mallard replied to Dave Hahn's discussion Airflow "through" a building or "beneath" the exterior cladding
"I'm suspecting the dust gets into the attic at the eaves where the largest pressure diff's are from the wind, from there down the wall outside the vapor barrier pumped through by gusts. The barrier job sounds too worthy for blow-through to…"
Apr 14
Dennis Heidner replied to Dave Hahn's discussion Airflow "through" a building or "beneath" the exterior cladding
"The last picture with fiber cement - looks like the pattern you might see from water. Is the fiber cement board on firring?  Blind nailing?  Did they paint the fiber board after installation and seal up the overlapping --- leaving only the…"
Apr 7
Rich Manning replied to Dave Hahn's discussion Airflow "through" a building or "beneath" the exterior cladding
"Interesting observation. It sounds like your a good Home inspector. It seems to me like the air movement is the  from the latter. The air is moving through the wall assembly caused by the Delta-P, and it is showing up where the…"
Apr 1
Dave Hahn posted a discussion

Airflow "through" a building or "beneath" the exterior cladding

As a licensed home inspector in the southeast, I have observed residential structures (typically 15 - 25 years old) clad with vinyl lap siding that have particulate matter deposited at some of the overlapping seams of the siding (see photos). This is typically observed on one side - presumably the leeward side.I've been of the impression that these “puff-like” markings are likely the result of dirt depositing on the siding from the movement of air in the space behind the siding due to changes…See More
Mar 31
Dave Hahn is now a member of Home Energy Pros
Jan 17, 2012

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Company
Metrolina Inspection Services, LLC
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BPI BA, EP, WHALCI, HP
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At 1:43pm on January 17, 2012, Diane Chojnowski said…

Hi Dave,

Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!

Don't forget to upload your profile photo. And add your location on our Member Map!


Thanks!
Diane, HEP Moderator

 
 
 

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