3.1001.8 Preparing for and Installing Insulation Around High-Temperature Devices, Systems, and Components

Penetrations and Chases
Desired Outcome: 
Combustible materials kept away from combustion sources
For supporting material, see Referenced Standards.

Conduct pre-inspection in accordance with SWS 2.0100.4 Work Area Inspection and Stabilization

Confirm that flues or other high-temperature elements are functioning as designed and do not present a fire or health and safety risk

Ensure a safe, durable workspace that will sustain improvement

Verify attic prep

Confirm that only noncombustible sealant has been used in contact with chimneys, vents and flues, or any heat source (e.g., non- IC IC Insulation contact -rated recessed lights, heat lamps, etc.). Remove any noncompliant materials and replace them with materials consistent with application

Sealant application at factory-built vents, flues, and chimneys shall be listed for use with that vent assembly

Fire blocking in the space around site-built and factory-built chimneys, as required by either the IBC IBC International Building Code , IRC IRC International Residential Code , or NFPA NFPA National Fire Protection Association, www.nfpa.org , as applicable, will be completed and inspected before erection of any insulation dams

Prevent air leakage

Ensure materials coming in contact with high-temperature areas will not present a fire hazard

Ensure insulation dams maintain clearance

Isolate high-temperature elements

A rigid, fixed dam having a height greater than the insulation to be installed will be constructed to ensure a 3" clearance between combustion flue vent and dam

Ensure dam material does not bend, move, or sag

Prevent a fire hazard

Sealant selection

Sealants will be compatible with their intended surfaces and applied in accordance with manufacturer specifications

Selection will be durable, pest resistant, and have a weather-appropriate seal

Indoor sealants will be low volatile organic compound ( VOC VOC Volatile organic compound )

Fire-resistance-rated assemblies will be provided with sealants permitted by the authority having jurisdiction and adopted building code

Prevent intrusion of moisture and pests into the sealed assembly

Prevent exposing workers or occupants to excessive VOC VOC Volatile organic compound levels

Ensure sealant meets or exceeds the performance characteristics of the assembly and is compliant with local fire code requirements


Insulation will not be allowed between a heat-generating appliance and a dam unless material is rated for contact with heat-generating sources

Prevent a fire hazard

Building operations staff education

Documentation of material and R-value will be provided to building operations staff

Provide occupant with documentation of installation