Accessible Pitched/Vaulted/Cathedralized Ceilings - Loose Fill Over

Verify that installation area is free of:

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

energized or undammed 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

Select insulation that has a flame spread and smoke development index of 25/450 or less when tested in accordance with ASTM E84 or UL 723

When vented eaves or soffits exist, mechanically fasten insulation baffles in every roof bay that extend above the final insulation level by at least 6"

Install a minimum of one insulation depth marker and one marker every additional 300 ft2 throughout installation area with measurement beginning at the air barrier

Install flags at all utility junctions that can be seen above the final level of the insulation

Install stabilized cellulose (i.e., wet-spray applied) when available

If ceiling pitch is less than 6/12, install loose fill cellulose to prescribed R-value without gaps, voids, misalignments, or wind intrusions

If ceiling pitch is 6/12 or greater, install baffles of the same height as the insulation perpendicular to slope a maximum of every 6' that prevent loose fill insulation from sliding downward then fill each bay to prescribed R-value without gaps, voids, misalignments, or wind intrusions

Install stabilized fiberglass (i.e., wet-spray applied) when available

If ceiling pitch is less than or equal to 6/12, install loose fill fiberglass insulation to prescribed R-value without gaps, voids, misalignments, or wind intrusions

If ceiling pitch is greater than 6/12, loose fill fiberglass insulation may not be used (dense pack fiberglass may be used)

Post a dated receipt signed by the installer that minimally includes: Installed insulation type, coverage area, installed thickness, minimum settled thickness, installed R-value, and number of bags installed