How To Insulate A Chimney In The Attic

Preparing an attic for insulation.

How to insulate a chimney in the attic.

Joe shows you how to make an attic insulation shield when space is an issue. 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. Place planks 1 by 6 or 1 by 8 or plywood sheaths across floor joists to improve your mobility 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.

Fibreglass is not considered non combustable correct. As such it can be used to insulate a chimney. How to insulate an unfinished attic. The attic is unheated.

It seems to me that this is a huge thermal bridge from the interior to the exterior. Anybody have any wisdom to shed. Some larger gaps weren t in direct contact with the masonry. You can insulate around masonry chimneys after airsealing with mineral or fiberglass batts no foam or cellulose directly against the chimney.

This makes it an ideal insulation material for use in areas that experience high temperatures. Where it goes through the ceiling it is 3 x6. To install loose fill insulation. Installing a vapor barrier.

Fiberglass insulation is naturally fire resistant. I m considering wrapping the chimney with insulation in the attic. My house has a big freestanding chimney in the middle of the house. To install insulation batts and blankets.

You can wrap the masonry with a 3 5 fiberglass batt and then blow cellulose up to the batts. 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.