Radiant Barriers

Verify that installation area is free of:

active water leaks, fuel leaks (i.e., gas, oil, propane), and pest intrusions

energized knob and tube wiring

uncovered electrical junctions

improperly terminated devices (ventilation fans, dryers, plumbing stacks, condensate lines, combustion appliance flues/chimneys, etc.)

unshielded high-temperature devices (non-IC rated recessed lights, chimneys, flues, vents, etc.) unless they are zero clearance devices

insulation escape openings

Verify that installation area is:

intact, able to support insulation weight, and air sealed

existing insulation is aligned with and in full contact with the air barrier

Select radiant barrier that has a flame spread and smoke development index of 25/450 or less and backing material for attics used for storage with a smoke development index of 450 or less when tested in accordance with ASTM E84 or UL 723

Install radiant barrier using mechanical fasteners according to manufacturer specifications

Install radiant barrier with the manufacturer's prescribed air space between it and the protected surface

Seal all seams, joints, and connections of the radiant barrier airtight

When installed on attic ceiling (i.e., roof framing) maintain a minimum clearance of 3" from ridge vents

When installed on gable walls, do not block gable vents

In vented spaces, install radiant barrier so that it withstands local wind loads

Post a dated receipt signed by the installer that minimally includes: Installed insulation type, coverage area, number and thickness of the air spaces, the direction of heat flow, and the installed R-value