Hi All

Wanted to get the opinion of an expert.

Attached is a photo of a customer's window.... as you can see there is a large cold spot above the window... Here's my opinion..am I right?

The large horizontal cold spot is thermal bridging from the double 2x6 or 8 top plate.

DO you agree?  The customer's pain was condensation on the windows.  WIndows were well installed with minimum leakage. The house was very tight, which I believe is the problem..not this.

Tags: ir, windows

Views: 378

Replies to This Discussion

Master shows!

John, Thanks for the review in Home Energy 101.  Sometimes, as auditors, we get so enamored with the technology, we forget the basics.  Comments like this, keep my feet firmly on the ground, and improved my audit results.

 

 

Matthew, this is not thermal bridging or else it would look like the wall studs and the window header. This is a result of running the blower door in a tight house where air coming in at the soffitt vents is pulled into the building through penetrations in the drywall. Take the same shot before the blower door has been run and it will look a lot more normal.

This is not thermal bridging and it has nothing to do with the blower door.  This is the ceiling plane meeting the wall plane, and this is thin insulation at this area combined with possibley a slight breeze blowing or convection causing cold air to ride up under the first couple of inches of attic insulation.  The very dark spot every 2 feet corresponds to the roof trusses/rafters and the week insulation adjacent to them. In the mid-Atlantic we are required to install hurricane clips - metal clips that hold the trusses/rafter down to the top plates.  We see the conducted cold from the metal as a dark spot every 2 feet even if it is not connected between with a dark area.  The blower door would have caused the cold air to come down the wall/ceiling joint into the wall - but this is not the case, and thermal bridging would have made all the studs show as much as the top plates.

Ed Minch

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Colin Genge commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"Pressurize the house to +25 Pa. Use smoke on the registers to identify leakage to outdoors then use…"
3 hours ago
Tim Reynolds replied to Alan Gindt's discussion Minneapolis Blower Door, Pressure Pan, and Bacharach CO 3 For Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"I was wondering if you would sell the pressure pan by itself and for how much? Thanks -Tim"
12 hours ago
Profile IconTim Reynolds and angela hines joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
12 hours ago
Profile IconAllen Rathey, Kevin Love, Shannon Kahl and 1 more joined Home Energy Pros
12 hours ago
angela hines replied to Alan Gindt's discussion Minneapolis Blower Door, Pressure Pan, and Bacharach CO 3 For Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"What is the price for them together? What is the price just for the blower door set?"
yesterday
Alan Gindt replied to Alan Gindt's discussion Minneapolis Blower Door, Pressure Pan, and Bacharach CO 3 For Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Yes"
yesterday
Anna Jursik's blog post was featured
yesterday
Everblue posted a status
"New Energy Auditor Jobs posted on our Massachusetts Job Board! Check them out: http://www.everblue.edu/hiring/job-board/massachusetts"
yesterday
Everblue posted events
yesterday
angela hines replied to Brooke Ingram's discussion 3 full sets of testing equipment available for sale! in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Hi is the Minneapolis blower door set still available?"
yesterday
angela hines replied to David Allen's discussion Like new! Great Deal! Minneapolis Blower Door system, Duct Blaster and Flir i-7 Infrared Camera for sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"I am interested in the blower door and camera. Are they still available? If so i will buy. Please…"
yesterday
angela hines replied to Alan Gindt's discussion Minneapolis Blower Door, Pressure Pan, and Bacharach CO 3 For Sale in the group Energy Auditing Equipment for Sale, Trade or to Purchase
"Is this still for sale? I am interested and would want to buy."
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service