Replies

1. 
   RalphWicklund | Feb 18, 2006 02:25am | #1

   Cut a plug and pound it into the hole.

   Or cut a 2x4 or whatever you have for the wall and fit it in on the plate between the studs as if you were placing another piece of regular blocking (unless you ran your other wires in the same bay - then cut a plug and pound it into the hole).

   
   

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   Edited 2/17/2006 6:28 pm ET by RalphWicklund

2. 
   Sphere | Feb 18, 2006 02:26am | #2

   Smack a nail plate over the hole(s) .

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3. 
   Shep | Feb 18, 2006 02:52am | #3

   here in NJ we're allowed to use rock wool insulation to fill any large holes in the framing. Take a chunk, stuff it in the hole, and you're done.

   My regular yard sells it by the individual batt, as well as by the bundle. Maybe you can find some near you.

1. 
   pm | Feb 18, 2006 04:22am | #4

   How about where I'm using the caulk. Do I need to try to completely fill the space around the pipe, from the top and the bottom, or just block the air space from one side or the other?

2. 
   andy_engel | Feb 18, 2006 04:25am | #5

   The downside of using rock wool as a fireblock is that it doesn't block air flow any better than does fiberglass. If you use a fire rated foam or caulk, you've blocked air leaks and fire paths.Andy

   "Never try to teach a pig to sing. It wastes your time and annoys the pig." Robert A. Heinlein

   "Get off your dead #### and on your dying feet." Mom

1. 
   G80104 | Feb 18, 2006 04:35am | #6

   We use large amounts of both types of insulation. Slows the flame spread. They (building dept) also make use draft stop every 10' when we stand party walls back to back. By the time the flame was to enter that area 2" void between one address & another. The fire would be quite the Barn Burrner at that point & I would bet that the insulation would not be doing much to slow the fire.

2. 
   Shep | Feb 18, 2006 06:19pm | #8

   When I use the rock wool, I stuff it in pretty tight. I don't know how much air can get through it, but it's probably minimal.

   I do use the fire caulk on the smaller gaps, like around pipes and wires. I haven't tried the foam yet.

3. 
   plumbbill | Feb 18, 2006 08:30pm | #9

   We use both.

   First pack rockwool in cavity around pipe then fire caulk over the top. Our inspectors will poke at it to make sure our fire stop is within manufactures specs.

4. 
   BillHartmann | Feb 18, 2006 05:08am | #7

   I don't think that they are talking about the Great Stuff in the can at HD.

   But rather this stuff.

   http://greatstuff.dow.com/greatstuff/pro/gaps.htm

   I see that it also available in a 12 oz "straw" can. But you will probably need to hunt around to find some.