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Old 05-01-2011, 07:22 PM   #1
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Default Fire stopping around pex

Starting a 6 unit apartment building and the building inspector wants fire stopping around my penetrations between floors. I never had to do this before, insulation company's used to do this for insulation reasons but they have stopped. Im wondering what to use, would like some advice. Thanks
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Old 05-01-2011, 07:32 PM   #2
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Starting a 6 unit apartment building and the building inspector wants fire stopping around my penetrations between floors. I never had to do this before, insulation company's used to do this for insulation reasons but they have stopped. Im wondering what to use, would like some advice. Thanks
Did you ask the building inspector why he wants you to firestop around a flammable material?
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Old 05-01-2011, 08:02 PM   #3
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I think he is referring to the use of fire caulk (intumescent caulk). Basically once the pex melts or burns the caulk will swell up and close off the hole preventing toxic fumes and fire to spread.
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Old 05-01-2011, 08:50 PM   #4
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I think he is referring to the use of fire caulk (intumescent caulk). Basically once the pex melts or burns the caulk will swell up and close off the hole preventing toxic fumes and fire to spread.
This is what was mentioned by the GC, he thinks it comes in a tube and is red in color. Where would I buy this and will it affect the pex?
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Old 05-01-2011, 08:57 PM   #5
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This is what was mentioned by the GC, he thinks it comes in a tube and is red in color. Where would I buy this and will it affect the pex?
Hilti has a full line of firestopping caulk and accessories, but I have never seen this product expand enough to fill a void left if the piping itself is gone, nor do I see the point, if the material burns the fire will be carried to the next floor despite the firestopping effort.
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Old 05-02-2011, 10:43 AM   #6
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http://selfsealfirestops.com/product/Type-SSR

Google Type Ssr firestop rings. This product states it is approved for pex. It will expand and crush the pipe, sealing the penetration.

I believe this is exactly the type of thing you are looking for.
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Old 05-02-2011, 11:52 AM   #7
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Old 05-02-2011, 11:50 PM   #8
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This is what was mentioned by the GC, he thinks it comes in a tube and is red in color. Where would I buy this and will it affect the pex?
There is a lot more to it than just throwing a tube in a caulk gun and filling in voids.Did the G.C. provide you with firestop submittals when you bid this job?Is it in your contract?If not then you need to put it back in the G.C.'s lap.Ultimately the responsibility lies with the architect.Firestop methods have to have an engineers stamp or they are worthless.You also have to be certified by the firestop manufacturer to install thier system.
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Old 05-03-2011, 12:25 AM   #9
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first--- i would contact the manufacturer to see what the reccomend, simply due to the warranty of the product
second--- i would simply ask the inspector what he requires, some are cool enough to explain in detail,
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Old 05-03-2011, 09:54 AM   #10
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I would think once the pex melts it will help stop the fire.
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