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Timothy Miller
Re: fire stops

Howdy is this a help page for DIYers ?

Ask the DIYERs if they know the difference between a fire stop an fire blocking- i think most have no idea that there is any difference. Thinking a fire block is material that is noncombustible or that it will not burn at a temperature or burn time of wood- if they even consider woods burning characteristics.

All DYIers please note: ALL POLYURETHANE FOAM SEALANTS ARE FLAMMABLE AND BURN HIGHLY TOXIC GASES- it is not a fire stop material because it is combustible.

If you want a non combustible material consider a gunnable caulk like FireSeal, Fire Stop, Fire caulk, or fire barrier putty.

Since everyone has a copy of ASTM E 136 an or ASTM E 814 ( modified) they will not get into trouble confusing "fire block" application of spray foam with a FIRE STOP: a non combustible building material that will not flame, smoke,or have a significant weight loss when subjected to 1380*F.

I would bet everyone does not have that copy ,ever heard of it, or any idea what these state.

So i stand corrected, spray foam is not a fire stop. Clear as smoke is it?

Timothy Miller
Re: fire stops

Sorry for my terms. Great Stuff is great stuff in my opinion and i use it allot... Please refer to Dow for what their product is or is not and to ASTM E 136 an or ASTM E 814 ( modified) for information. I am not making any statements or implying anything about it and code requirements for residential fire blocking or any thing else. I am just trying to explain my opinion that consumers might confuse fire block & fire stopping materials.

jenny433
Re: fire stops
LisaMorris wrote:

***, I just realized it now. Thanks for that info. I should have surfed the net.

i dont know how many times ive seen homeowners look things up and the information is nowhere near correct. i am saying this as a licensed carpenter who specializes in high end renovation and also worked in commercial construction where fire codes are highly enforced

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