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: 393

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

Home Energy Magazine posted a discussion

Let's Talk Gender

It’s no secret that home performance is a male-dominated industry. Attend any industry conference…See More
1 hour ago
Mark Rogers added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Retrotec Blower Door Kit $1800

Retrotec Blower Door Kit complete with:DM2 Mark II digital manometer & automated fan…See More
1 hour ago
Maria Lacey replied to Jamie Kaye's discussion Flickering LED lights
"I think the tendency is to look at lamps (light bulbs) as though they're the same if they all…"
2 hours ago
tedkidd commented on Scott Mellberg's blog post Lessons from Energy Efficiency Advisors: Getting Homeowners Onboard with Home Performance
"Absolutely agree Ben, "How much do I use, how much do others use, and what is my reasonable…"
3 hours ago
Profile IconTauran Ivall, Alex Burnham and Annika Brink joined Home Energy Pros
4 hours ago
David Eakin replied to Jamie Kaye's discussion Flickering LED lights
"I also thought that, but I tried to put a CFL in the A-19 outside fixture at my…"
4 hours ago
Ben Jacobs commented on Scott Mellberg's blog post Lessons from Energy Efficiency Advisors: Getting Homeowners Onboard with Home Performance
" I believe a major problem of government, of energy utilities, and home energy efficiency…"
5 hours ago
Jill Lindman posted an event

EEBA Houses That Work Education & Training at Johnson County Administration Building

August 22, 2014 from 8:30am to 4:30pm
About the SessionsIntro to Houses That Work: In this session participants learn how the many…See More
5 hours ago
Glen Gallo replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Title 24 requires whole house fans in zones 8-14 in the prescriptive path only. With many…"
6 hours ago
Jenn Saunders replied to Jenn Saunders's discussion iEnergyApp: Quickly generate professional reports for homeowners and get more contracts!
"Hey Tom, You are most welcome.  iEnergyApp is not free, but it is reasonable and pays for…"
6 hours ago
Jenn Saunders posted a photo

Automatically Generate Clean Simple Reports for Homeowners

Stop spending hours cropping and resizing images, formatting and reformatting a Word document to…
7 hours ago
Eric Sperline added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Beware ebay seller "supermomofps"

I bought a blower door system on Ebay from "supermomofps"  The item was never sent and…See More
7 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service