Remove the insulation between the joists where the flue is located to clear an area about 18 inches away from the flue on each side.
How to insulate a chimney in the attic.
How to insulate an unfinished attic.
To install loose fill insulation.
Apply a thick bead of high temperature caulk the flue on one.
Some larger gaps weren t in direct contact with the masonry.
Don t you still need a 2 clearance to combustables.
You can insulate around masonry chimneys after airsealing with mineral or fiberglass batts no foam or cellulose directly against the chimney.
You can wrap the masonry with a 3 5 fiberglass batt and then blow cellulose up to the batts.
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I m considering wrapping the chimney with insulation in the attic.
My house has a big freestanding chimney in the middle of the house.
Place planks 1 by 6 or 1 by 8 or plywood sheaths across floor joists to improve your mobility in the attic.
Installing a vapor barrier.
It seems to me that this is a huge thermal bridge from the interior to the exterior.
Fibreglass is not considered non combustable correct.
Fiberglass insulation is naturally fire resistant.
This makes it an ideal insulation material for use in areas that experience high temperatures.
The attic is unheated.
Preparing an attic for insulation.
Where it goes through the ceiling it is 3 x6.
To install insulation batts and blankets.
To block the air pathway the technician cut 26 gauge metal flashing to fit over the gaps and sealed the joints between the metal and the masonry chimney and the wood framing using high temperature caulk in this example 3m fire barrier sealant.
Anybody have any wisdom to shed.