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Old 03-04-2009, 04:57 PM   #1
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FLIR Thermal Imaging Scan - Insulation Issues


This is a spin off of another thread I had started in the HVAC section which is no longer relevant to just HVAC.

I hired an inspection firm to come and do a thermal scan of the house today.

The inspection was completed this morning. We found several areas that I can improve air infiltration. As I suspected, the rim joists...some of the outlets and switches in the exterior walls need gaskets (some have them). ON the part of the house that is on a slab, there is considerable air infiltration at the base of the walls. Two of the doors leak (as suspected).

I need to find a way to seal up the seam between the cement wall and the house framing outside....I need a j shaped nozzle for the end of a caulking gun to be able to get up in there...as I cant get a regular straight tube in there. Any suggestions?


Attached are some images from the scan.
Attached Thumbnails
FLIR Thermal Imaging Scan - Insulation Issues-th780008.jpg   FLIR Thermal Imaging Scan - Insulation Issues-th780011.jpg   FLIR Thermal Imaging Scan - Insulation Issues-th780015.jpg   FLIR Thermal Imaging Scan - Insulation Issues-th780021.jpg   FLIR Thermal Imaging Scan - Insulation Issues-th780039.jpg  

FLIR Thermal Imaging Scan - Insulation Issues-th780044.jpg  

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Old 03-04-2009, 04:59 PM   #2
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FLIR Thermal Imaging Scan - Insulation Issues


and a few more of the basement and outside foundation.

We were able to find where the bathroom fans exhaust to. They dont have dampers, so often cold air pours back in through the fans when they are off.

Now that I know where they vent in the sofit, I can fix them.
Attached Thumbnails
FLIR Thermal Imaging Scan - Insulation Issues-th780058.jpg   FLIR Thermal Imaging Scan - Insulation Issues-th780063.jpg   FLIR Thermal Imaging Scan - Insulation Issues-th780064.jpg   FLIR Thermal Imaging Scan - Insulation Issues-th780065.jpg   FLIR Thermal Imaging Scan - Insulation Issues-th780067.jpg  


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Last edited by AndrewF; 03-04-2009 at 05:02 PM.
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Old 03-04-2009, 05:25 PM   #3
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FLIR Thermal Imaging Scan - Insulation Issues


You can remove your baseboard, and caulk between the baseboard and floor.

Looks like you got a good draw on 1 or 2 of those cords plugged into the receps.
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Old 03-04-2009, 05:30 PM   #4
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FLIR Thermal Imaging Scan - Insulation Issues


Very cool.

I've been to a product presentation on FLIR (very cool stuff) FYI: BMW uses their cameras for nite vision.

I'm thinking to call the local rep and ask for a demo unit to do the same to my house! =)

Last edited by skizsam; 03-05-2009 at 08:15 AM. Reason: grammer
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Old 03-04-2009, 07:59 PM   #5
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FLIR Thermal Imaging Scan - Insulation Issues


Quote:
Originally Posted by beenthere View Post
You can remove your baseboard, and caulk between the baseboard and floor.

Looks like you got a good draw on 1 or 2 of those cords plugged into the receps.
The cord in the first picture is to the paper shredder.
The cord in the other picture is to the hot tub, I expect that one to have a draw.

Yes, we were talking and the recommendation is to seal up the outside, and then for the walls on the slab part of the house, to remove the baseboard and seal it up real good, then put the baseboard back.
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Old 03-04-2009, 08:00 PM   #6
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FLIR Thermal Imaging Scan - Insulation Issues


He also recommended to insulate all the trunk lines in the basement, since it is usually 55-60 down there I am losing a lot of heat that way....even though I do want the basement to be warmer/heated.
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Old 03-05-2009, 07:16 AM   #7
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FLIR Thermal Imaging Scan - Insulation Issues


Insulating the duct work, is both a good idea, and a bad idea.

You end up with your floors being cooler. And many people feel colder, when their feet get cold, and then turn up the stat to compensate for it.

So if you insulate the duct, if the joist bays aren't insulated, you should also insulate them.
Now that you did all that, you end up with a much cooler, and damper basement.
So then, you need to add a supply or 2 to the basement, to warm it back up.
Kind of defeating the purpose of insulating the duct work in the first place.

A sometimes more effective thing to do. Is use a dehumidifier in the basement, and keep it set for 50%RH.

Unless the occupied area of the house needs humidity.
Then adding a supply and return to the basement sometimes works better.
Warms up the basement, and adds humidity to the occupied area.

.
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Old 03-05-2009, 07:52 AM   #8
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FLIR Thermal Imaging Scan - Insulation Issues


"I need to find a way to seal up the seam between the cement wall and the house framing outside....I need a j shaped nozzle for the end of a caulking gun to be able to get up in there...as I cant get a regular straight tube in there. Any suggestions?"

The apron stores sell vinyl tubing in different sizes. Get a piece and slip it over the nozzle on your caulk tube. You may have to clamp or tape it. You can direct it anywhere you want.
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Old 03-05-2009, 09:56 AM   #9
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FLIR Thermal Imaging Scan - Insulation Issues


Quote:
Originally Posted by Maintenance 6 View Post
"
The apron stores sell vinyl tubing in different sizes. Get a piece and slip it over the nozzle on your caulk tube. You may have to clamp or tape it. You can direct it anywhere you want.
Why didn't I think of that. Thanks for the suggestion. I have many sizes of vinyl tubing already that would work perfect.
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Old 03-05-2009, 10:00 AM   #10
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FLIR Thermal Imaging Scan - Insulation Issues


Quote:
Originally Posted by beenthere View Post
Insulating the duct work, is both a good idea, and a bad idea.

You end up with your floors being cooler. And many people feel colder, when their feet get cold, and then turn up the stat to compensate for it.

So if you insulate the duct, if the joist bays aren't insulated, you should also insulate them.
Now that you did all that, you end up with a much cooler, and damper basement.
So then, you need to add a supply or 2 to the basement, to warm it back up.
Kind of defeating the purpose of insulating the duct work in the first place.

A sometimes more effective thing to do. Is use a dehumidifier in the basement, and keep it set for 50%RH.

Unless the occupied area of the house needs humidity.
Then adding a supply and return to the basement sometimes works better.
Warms up the basement, and adds humidity to the occupied area.

.
Interesting points.

The basement has four supply ducts already. I do have a humidifier down there, it is currently off as the RH levels in the basement are around 30%.

The rim joists, the floor and the duct are not insulated.

I installed an Aprilaire 600a humidifer a few weeks ago as the humidity for the rest of the house runs as low as 20% at times.
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Old 03-09-2009, 10:18 AM   #11
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FLIR Thermal Imaging Scan - Insulation Issues


How about insulating the rim joist?

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