INFRARED THERMOGRAPHY USERS

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INFRARED THERMOGRAPHY USERS

This group is dedicated to knowledge sharing and discussion of infrared thermography for building sciences and energy applications.

Members: 179
Latest Activity: Feb 15

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New building thermography 360 pages ebook - including blower door and heat flux meter !

Started by Davide Lanzoni. Last reply by Don Fitchett Jan 10, 2015. 3 Replies

Link to buying and pdf preview page:http://www.saige.it/Details.aspx?id=41This is a rich handbook (over 300 pages in original printed edition, much more in this ebook) about thermography applied…Continue

Tags: door, airtightness, blower, infrared, building

Expert Eye Needed

Started by Matthew P. Last reply by Ed Minch Nov 15, 2014. 17 Replies

Hi AllWanted 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…Continue

Tags: windows, ir

Google Thermal View?

Started by Joshua Knittel. Last reply by tedkidd May 31, 2013. 4 Replies

As most of you know, there is more to an energy audit or energy rating (such as a HERS rating) than just the thermal imaging - but this start up company is using it to get a nationwide database going.........Here's a link to the article on…Continue

Tags: Audit, business, Energy, Google, imaging

Infrared Image - What is it?

Started by Fluke Thermal Imaging. Last reply by Dale Sherman Apr 26, 2012. 6 Replies

We thought it'd be fit to share this infrared image we received from group member, CK Ang, in New Zealand. Just wanted to spark some discussion here on what you guys think this image is of, and what the problem could be. A little background on the…Continue

Tags: Fluke, Ti55FT, telephoto, lens, Ang

Timber Home with no effective air barrier

Started by Davide Lanzoni. Last reply by Sean Lintow Sr Apr 11, 2012. 1 Reply

Hi folks,just another image of a brand new timber home without an effective air barrier, and without sealing tapes.…Continue

New article on infrared thermography

Started by John Snell. Last reply by Jim Klebes Nov 17, 2011. 1 Reply

The Journal of Light Construction has long been respected as a place where builders can educate themselves and share information. I was recently asked to write an article introducing their readers to thermography and how it can be used in the…Continue

Moisture detection, a fascinating thermal signature

Started by John Snell Sep 9, 2011. 0 Replies

I don't mean to derail folks from this website to ours (I often send folks here too!) but that is exactly what I'm going to do because www.IRTalk.com has a fascinating discussion about thermal signatures of…Continue

New York first passivhaus ...

Started by Davide Lanzoni. Last reply by John Snell Aug 25, 2011. 4 Replies

... with windows with a better R-value than walls ?…Continue

Using thermal imagers in the summer

Started by John Snell. Last reply by Tyson Pischel Jul 7, 2011. 5 Replies

Too many thermographers leave their imagers in the case during the summer. This comes, in part, from the way we used to work when imagers were not nearly as sensitive and our understanding of how to use them was limited to winter work.Get the darned…Continue

IR and Moisture Meters

Started by Bret Monroe. Last reply by allen p tanner Jun 23, 2011. 12 Replies

As many of you know the new RESNET Guidelines are being worked on and I am advocating for the use of Moisture Meters to ensure potential serious moisture problems in sidewalls and building substrate material is not being overlooked when identified…Continue

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Comment by TJ Ewing on November 17, 2010 at 1:15pm
Thanks for the input Allen. the wall is above grade and is stacked concrete block. Hopefully know more on friday.
Comment by allen p tanner on November 17, 2010 at 1:06pm
The church wall that is showing blue may be wet or may have an active air leak causing the cooling effect. Check along the wall with a radiometric meter and measure temperature difference. A pin point or radiometric moisture meter will confirm moisture.
Comment by allen p tanner on November 17, 2010 at 1:02pm
The bulletin board is causing the wall to appear cool around it as the heat is being redirected away from the wall in this area.
allen@nyinfraredscan.com
Comment by allen p tanner on November 17, 2010 at 1:00pm
The wall appears to be stacked concrete block. To check for open cells, missing insulation or filler: you need to thermal load the wall from the outside and check with IR several times during the loading span to get a good picture of the cells. If the wall is below grade; then it will be harder to test. It appears that the hot electric or water baseboard is heating the wall unevenly and distorting the IR image. It will be nearly impossible to get and accurate IR scan on a concrete wall below grade or in contact with soill.
allen@nyinfraredscan.com
Comment by dale garren on November 11, 2010 at 8:32am
one more question, is the masonary full cell grout?
Comment by Rod Hoff on November 11, 2010 at 8:27am
TJ
Yes, to see a thermal drop due to evaporative cooling where the moisture issued is water intrusion the surface would have to be permeable. The moisture must reach the surface. Condensation, of course, occurs on the surface and therefore is not affected by permeance.
Comment by TJ Ewing on November 10, 2010 at 7:45pm
Yep still here but was out of office all day today, just getting caught up on the flurry of input! Thanks so much for the questioning and ponderings Michael, Rod and Dale.

Just a note that the wall was not showing signs of surface water at the time the thermograms were taken.
- The bulletin board is flush with the wall, no standoffs.
- The wall is masonry block with an external brick veneer
- The interior of masonry is painted, unknown permeability. Drip marks are evident along the bottom of the bulletin board at the center area of interest
- At time of thermogram, Temp-in = 72, RH-in= 70% (at end of mass with >300 people inside), Temp-out=63, RH-out=64%. Again the wall surface wetness manifests only during summer on hot humid days.
- The heating system is water based, and does not provide cooling. No cooling at all in building.

Rod, the evaporative cooling water technique you outline is very interesting. So do I have it correct that you are saying if there is evaporative cooling and a non-permeable surface then we can rule out water intrusion? However if the surface is permeable we can’t rule out either intrusion or condensation?

What seems to make sense at this point is for further inspection by removal of the bulletin board. And as Dale aptly suggested, inspection at the beam pocket, and to determine a presence of a vapor barrier?
Comment by Michael Stuart on November 10, 2010 at 7:23pm
Dale, another good thought. I believe that the apparatus at the bottom is a heater system. Rod and I also asked the same questions about the bulletin board mounting.

TJ... are you still out there? ;-)
Comment by dale garren on November 10, 2010 at 3:04pm
has anyone checked the water barrier detail around that beam pocket in the masonary portion

what is the apparatus at base of wall?

is the bullitin board "stood off" from wall?
Comment by Michael Stuart on November 10, 2010 at 12:36pm
This is another of TJ's images of the situation... I just applied a low-temperature color alarm to highlight the area of concern.
 

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