Attic Insulation Around Fireplace Flue

Although the cellulose insulation piled up around the gas flue in an attic in the photo above is an extreme example we find missing shields around gas flues in attics occasionally.

Attic insulation around fireplace flue.

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. Attic insulation around furnace flues sometimes it can be helpful to put the cart in front of the horse. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic. Insulation has been sprayed inside the shield eliminating the required air gap.

A chimney liner or flue lining is a conduit that runs from a fireplace firebox to the top of a chimney. This makes it an ideal insulation material for use in areas that experience high temperatures. Insulating around a fireplace prevents drafts. Insulating around these ixtures see page 2 2 attic air sealing and adding insulation are do it yourself projects if your attic is accessible and not too dificult to move around in.

Because the pipe gets hot building codes usually require 1 inch of clearance from metal flues 2 inches from masonry chimneys to any combustible material including insulation. Fiberglass insulation is naturally fire resistant. 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. Insulating your chimney liner helps to.

1 prevent problematic heat transfer from hot masonry to dry home frames in turn decreasing the risk of combustion. However if upon inspection. 2 increase fireplace efficiency by funneling air in and out of a home. As such it can be used to insulate a chimney.

Most all insulation manufacturers recommend a 3 clearance to any heat producing device be maintained. If the point where your chimney passes through your wall or roof is badly insulated there is a lot of heat passing through that area and. Apply a thick bead of high temperature caulk the flue on one side.