Proper insulation around vent through ceiling chase

What is the correct way to insulate around a metal vent flue pipe running through a square ceiling chase opening? If blow-in is used the chase opening remains uninsulated, and how to keep clearance away from pipe?

Is this for your own house?

Using a metal thimble with mineral wool insulation above the thimble, keeping necessary space clearance, if any, per vent’s manufacturer specs.


Simon’s got it!

Welcome o our forum, Allan!..Enjoy! :smile:

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