Attic Insulation Around Metal Chimney

Metal chimney fire clearance codes specifications.

Attic insulation around metal chimney.

This article describes the basic fire clearance requirements for four types of manufactured metal chimneys. B vents l vents class a chimneys and 650c chimneys. Wet zinc sacrifices early. 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.

Can insulation be put next to the matel chimney in the attic area for a gsa furnace. 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. Initial vent exposed in cold attic below roof deck not appropriately sized unenclosed to begin with often problems. 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.

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. As such it can be used to insulate a chimney. Fiberglass insulation is naturally fire resistant. This makes it an ideal insulation material for use in areas that experience high temperatures.

How to insulate a metal flue pipe. Are rated for zero clearance.