icf walls and service cuts
Last Post 11 Sep 2009 07:01 PM by Clark. 3 Replies.
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bashmaxasUser is Offline
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10 Sep 2009 12:50 AM
what's the best practice for services cuts in a icf wall.   should i use the next size pipe to make a sleeve that the service requires?  does this include dryer vents,  electrical,  sewage,  water,  security ,  et?   does the  pipe or sleeve need to be covered with anything to protect it from the concrete?  if a sleeve,   how do you water proof it?    
ClarkUser is Offline
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11 Sep 2009 11:15 AM
It's a good idea to put a PVC pipe sleeve through the ICF form for every penetration you can think of. You need to carefully measure the locations for these sleeves so they are properly aligned with interior partitions, as needed, or so they are not blocked by eventual interior objects (beams, ducts, pipes, etc.) Use a sleeve with an inside diameter which slightly larger than the O.D. of the pipe it must accommodate. Some additional penetrations to consider: central vacuum pipes, lawn sprinkler system water supply and wiring, landscape lighting conduit, air conditioner pipe and cables,. No need to cover the sleeve. I sealed each penetration with spray foam after the pipe or conduit was placed.
dmaceldUser is Offline
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11 Sep 2009 03:12 PM
Plumbing penetrations must be sleeved per code. You might stick in a few extra sleeves here and there cut off flush with interior and exterior wall surfaces. Fill them with foam and cover up with the wall finish. Make an accurate notation where they are located and if you ever need to add a pipe or wire, etc., through the wall you will already have the sleeve in place.
Even a retired engineer can build a house successfully w/ GBT help!
ClarkUser is Offline
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11 Sep 2009 07:01 PM
Good idea, dmaceld. If worse comes to worse, however, it's not too hard to hammer drill a hole through the concrete up to 2" in diameter. Bigger than that gets tricky. I cut two 5" dia. holes through 7-1/2" of ICF concrete wall with a diamond core bit. Cut right through 1/2" rebar to boot. It was a bit slow and required a constant stream of water to cool the bit. It also was not cheap to rent the drill and bit. Better to put the sleeves in and avoid the fuss.
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