Attic Insulation Around Metal Chimney

Metal chimney fire clearance codes specifications.

Attic insulation around metal chimney.

Are rated for zero clearance. Among the many air leakage points damon and his crews commonly encounter in an older maine house is the open chase around the brick chimney. Wet zinc sacrifices early. This makes it an ideal insulation material for use in areas that experience high temperatures.

This article describes the basic fire clearance requirements for four types of manufactured metal chimneys. 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. Not ever wrapping metal vent system or metal manufactured chimney system with insulation.

How to insulate a metal flue pipe. B vents l vents class a chimneys and 650c chimneys. Initial vent exposed in cold attic below roof deck not appropriately sized unenclosed to begin with often problems. With the metal types check with the manufacturer as some are still tested with the loose attic insulation shield firestops and should be left as is.

As such it can be used to insulate a chimney. Air sealing a flat attic and upgrading the insulation with a blanket of blown cellulose is bread and butter work for weatherization contractor matt damon and his company penobscot home performance based in bucksport maine.