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Old 05-04-2013, 08:32 AM   #1
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firewell install between heat duct and floor


i had a housing inspection and the inspector coded me on not having a type of firewall protection between the heat duct going thru the floor and the upper floor. can someone tell me what i need and how to install that. does it have to be sheet metal and if so do i have to remove the duct or can i work around and how big does it have to be ? confused and want to pass inspection
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Old 05-04-2013, 12:30 PM   #2
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firewell install between heat duct and floor


in western ny any penetrations between floors were required to be fire caulked to seal them. this included plumbing pipes, wiring and heat ducts. check with your building inspector on what is required in your location.
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Old 05-04-2013, 12:51 PM   #3
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firewell install between heat duct and floor


Moved to Building and Construction forum.
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Old 05-05-2013, 07:51 AM   #4
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firewell install between heat duct and floor


What the inspector is talking about is called fireblocking. By blocking airflow, it prevents a fire from traveling to upper parts of the house through the openings for piping, ductwork, wiring, etc. The easiest way to seal these is with expandable firestop foam. Any big box store carries it, and it's not expensive. For larger openings, such as for ductwork, you may be able to just stuff some fiberglass insulation around the duct. I was allowed to do that when I built my house. But you really need to talk to the inspector about your location's specific requirements.
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