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09-02-2010, 02:30 PM   #1
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## Attic Dams or barriers

I am tring to fiqure out how high to build the walls around the entry way of the attic in my garage, I am not sure how high to go?

09-02-2010, 09:37 PM   #2
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If for insulating: http://www.ornl.gov/sci/roofs+walls/...on/ins_16.html

Figure the material times the R-value, gives the height: http://www.ornl.gov/sci/roofs+walls/...on/ins_06.html

“Attic access opening size (22” x 30”) and headroom above (30”) are same as U.B.C. However, IRC specifies that any attic space 30 sq. ft. or larger and a vertical height of 30 inches or more, must be provided with a complying access. (IRC 807.1) From: http://docs.google.com/viewer?a=v&q=cache:BykbPl6yI3MJ:www.12wax.com/Garda%2520Heated%2520Drive%252093/Garda%2520Heated%2520Drive%252093-Pages/IBC(2006)SUMMARY.pdf+IRC+807.1&hl=en&gl=us&pid=bl& srcid=ADGEESg7brpyShHsa_W-oEf5YLqqM7TXJfq1D3zpsLxtBWWIEXDMOaPgySMzKBDQmAVJFz 5tVK-ImpdtaPrCPxo_1WwPKgwV54h_NxnNwTDTWr1jpRkJSS235ejV7 PaKE6xmg-x_8J4i&sig=AHIEtbSRoB1Wh4YY_-lBGGkPryQ1TVnW-A

Gary

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