How To Insulate A Chimney In The Attic

To install insulation batts and blankets.

How to insulate a chimney in the attic.

Some larger gaps weren t in direct contact with the masonry. As such it can be used to insulate a chimney. You can wrap the masonry with a 3 5 fiberglass batt and then blow cellulose up to the batts. My house has a big freestanding chimney in the middle of the house.

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. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Where it goes through the ceiling it is 3 x6. Place planks 1 by 6 or 1 by 8 or plywood sheaths across floor joists to improve your mobility in the attic.

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. How to insulate an unfinished attic.

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. Apply a thick bead of high temperature caulk the flue on one. Don t you still need a 2 clearance to combustables. It seems to me that this is a huge thermal bridge from the interior to the exterior.

Fibreglass is not considered non combustable correct. The attic is unheated. You can insulate around masonry chimneys after airsealing with mineral or fiberglass batts no foam or cellulose directly against the chimney. Fiberglass insulation is naturally fire resistant.

To install loose fill insulation. Preparing an attic for insulation.