Attic Insulation Around Metal Chimney

This article describes the basic fire clearance requirements for four types of manufactured metal chimneys.

Attic insulation around metal chimney.

Wet zinc sacrifices early. Metal chimney fire clearance codes specifications. Ideally both metal and masonry chimneys should be airsealed for energy conservation purposes air leakage and to stop house moisture getting to the attic with the escaping house air. Fiberglass insulation is naturally fire resistant.

The flue is the metal tubing that extends up from the top of your gas furnace or water heater that carries the carbon monoxide gas from the heating unit to your. 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. Not ever wrapping metal vent system or metal manufactured chimney system with insulation. This makes it an ideal insulation material for use in areas that experience high temperatures.

As such it can be used to insulate a chimney. 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. 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.

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.