How To Insulate A Chimney In The Attic

This makes it an ideal insulation material for use in areas that experience high temperatures.

How to insulate a chimney in the attic.

It is often installed in gaps around the chimney and flue to prevent airflow that can siphon the heat away from the interior of the building. Some larger gaps weren t in direct contact with the masonry. 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. I m considering wrapping the chimney with insulation in the attic.

Anybody have any wisdom to shed. Place planks 1 by 6 or 1 by 8 or plywood sheaths across floor joists to improve your mobility in the attic. Apply a thick bead of high temperature caulk the flue on one. As such it can be used to insulate a chimney.

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. To install loose fill insulation. Where it goes through the ceiling it is 3 x6. You can wrap the masonry with a 3 5 fiberglass batt and then blow cellulose up to the batts.

Don t you still need a 2 clearance to combustables. Joe shows you how to make an attic insulation shield when space is an issue. Fiberglass insulation is naturally fire resistant. How to insulate an unfinished attic.

The attic is unheated. Installing a vapor barrier. It seems to me that this is a huge thermal bridge from the interior to the exterior. My house has a big freestanding chimney in the middle of the house.

You can insulate around masonry chimneys after airsealing with mineral or fiberglass batts no foam or cellulose directly against the chimney. Fibreglass is not considered non combustable correct.