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gap between furnace vent and roof decking

 05/01/2009 04:31 PM acs1123

How much of a gap should there be between the furnace vent pipe and the hot water heater vent pipe and the roof decking on a roof penetration? Do you need to use fire proof/retardant caulk in the air gap?

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Tieger plumbing

 05/02/2009 02:14 PM Sylvan




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