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Application for Great Stuff in sources near heat

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Hoschton, GA
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[#1] Posted: 06/16/2012 - 1:50:04 PM
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Photo depicts silver paint over "Great Stuff" expandable foam. Says on the safety sheet not to use around heaters or furnaces where foam may come into contact with heat-conductive surfaces. This foam was applied around air ducts and boxes adjacent to an electric heat pump. Any issues I may not be aware of?

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Hank Spinnler, ACI
Harmony Home
Inspection Services
Atlanta Georgia
www.HarmonyInspection.com
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Samantha, AL
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Application for Great Stuff in sources near heat
[#2] Posted: 06/17/2012 - 05:15:23 AM
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That looks like an home owner repair. If a sheet metal person /duct installed did that they need to be took out behind the wood shed.

There is no need for the great stuff if the duct was installed properly. It looks like someone did not want to buy some duct wrap.

Have a good day inspecting.
Phillip R. Smith Sr.
Samantha (Tuscaloosa) AL
www.homesweethomeinspectionsal.com
"When you inspect crap, you find crap." Phillip 2010
"Always desire to learn something useful."
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Hoschton, GA
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Application for Great Stuff in sources near heat
[#3] Posted: 06/17/2012 - 08:15:01 AM
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Homeowner reported he did it the day before the inspection. This is more commonly done around vent boot registers in attic ceilings.
Hank Spinnler, ACI
Harmony Home
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Atlanta Georgia
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Lafayette, Louisiana
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Application for Great Stuff in sources near heat
[#4] Posted: 06/17/2012 - 08:41:25 AM
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I've never seen spray foam used that way. Phillip's right, a proper installation would have eliminated the need for foam, but aside from the MSDS, what's the concern? Heat pumps don't generate air temps very high, only about 90 degrees or so.

Marc

"If Guam gets too overpopulated, it might tip over."
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Application for Great Stuff in sources near heat
[#5] Posted: 06/17/2012 - 3:37:13 PM
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I would be concerned about the foam restricting air flow inside the duct.

Great Stuff does makes an orange foam that is UL listed as a fire block and can be used around vents.

http://greatstuff.dow.com/medi...730a.htm

Mike Lamb
http://www.inspection2020.com/
   
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