Air Space Along Side Of Chimney In Attic

For exterior chimneys a 1 inch minimum air space must be maintained between the chimney and combustibles.

Air space along side of chimney in attic.

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. If your chimney runs through the interior of the house look in the attic to see if it is centered in its framed opening. Combustible material shall be permitted to abut the masonry chimney walls provided there is a minimum of 12 inches to the inside surface of the flue liner or in the case of a fireplace 12 inches from the inside surface of the firebox. Can insulation be put next to the matel chimney in the attic area for a gsa furnace.

Three wall chimney systems use a combination of air cooled and insulating components. The solid insulation fits between the inner and center walls. Potentially improving the efficiency of the house overall. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving into the attic.

What kind of flue is this. Insulated chimneys differ further from air cooled systems in their structure. I ve been thinking that i might be able to insulate around the chimney in the loft space. Allow 1 inch of overlap.

Also the 2 inch air gap that i recommend is generous for some forms of insulated metal chimney which only require a 1 inch airspace. Keeping the chimney from sucking all of the heat out of this area and 2. Measure the four sides of the chimney where it goes through the ceiling framing and add up the. Unless you re sure of the type of chimney you ve got use a 2.

The attic loft will be used as semi conditioned living space and i am concerned about 1. How to air seal a metal chimney or flue vent pipe option 1 air seal at the bottom of the framing. Cut two pieces of sheet metal to cover the chase opening. Access the attic through a crawl space in the ceiling using a stepladder or use or the attic stairs.

If it s a b vent typically you need to leave a 1 clearance around the vent take a look at the listed clearance for your particular. Fasten the sheet metal to the framing and seal all edges and seams with fire rated caulk. I m wondering about the efficacy of insulating the outside of a masonry chimney.