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Old 02-22-2014, 08:31 AM   #1
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Seeking recommendations for fireblocking


Hi Folks,

I just had my framing inspection for a diy basement I'm finishing and failed due to lack of fireblocking. I had no idea that it was needed and why. I spent last night reading and I think I'm ready to go except for one tricky spot.

I have an existing 2x4 wall that had plumbing. I think may be able to scab a board in near the pvc pipe, but I'm looking for advice on how to handle this gap. I've got a couple of pictures attached that should tell the story.

Thanks in advance,
Matt
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Old 02-22-2014, 11:05 AM   #2
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Seeking recommendations for fireblocking


You can fill the area around with fire block spray foam. home depot carries a 3m brand i used plenty of times never had a problem with inspector. I heard roxul insulation works too but never talking to inspector about it. From what i hear you can stuff the whole cavity with it instead of trying to add 2x4 or plywood and then caulking the gaps with fire caulk.

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Old 02-22-2014, 02:10 PM   #3
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Seeking recommendations for fireblocking


I ended up filling in where I could with 2x4's. Now I need to fill the cavities.

I'll check at home depot for the 3m product.
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Old 02-22-2014, 03:52 PM   #4
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Seeking recommendations for fireblocking


Get some fire caulk too. You need to caulk all the wires going through the top plate.
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Old 02-22-2014, 09:12 PM   #5
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Seeking recommendations for fireblocking


How to fireblock framing

Read and hit "next section" 3 more times; http://publicecodes.cyberregs.com/ic...002_par017.htm

"7. Wood furring strips or other wood framing members attached directly to the interior of exterior masonry walls or concrete walls below grade except where an approved vapor retarder is applied between the wall and the furring strips or framing members." from; http://publicecodes.cyberregs.com/ic...9_3_par203.htm

Gary
PS. check locally; http://www.reedconstructiondata.com/...odes/missouri/
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Old 02-23-2014, 03:28 AM   #6
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Seeking recommendations for fireblocking


I'd suggest that you contact the inspector and ask him for some advice and recommendations to meet or exceed the township's building department's requirement.

Fire blocking is basically nothing more than some additional horizontal boards between the studs and/or sealing the gaps through which piping and wiring run through the sole and/or top plates.

In your case, looking at your photo's it may also include the gap between the existing masonry walls and your new framing.

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