1. Prep attic for insulation

• Follow steps in Insulation: Prep Attic before insulating.

• Verify that installation area is free of active water leaks, fuel leaks (i.e., gas, oil, propane), and pest intrusions

• Identify any energized or undammed knob and tube wiring

• Identify uncovered electrical junctions

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

• Inspect for insulation escape openings

• Verify that installation area is intact and able to support insulation weight

2. Establish clearance from combustibles

• Follow steps in Air Seal & Dam High-Temp Attic Penetrations

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

3. Install air sealing measures

• Install all air-sealing measures listed on work orders prior to adding insulation.

For additional guidance, reference the Air Seal Attic steps

4. Maintain consistent height and thickness

• Use depth rulers to ensure the insulation is at consistent depth. 

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5. Install insulation

• Start work from the far end of space and work back toward the attic entrance.

• Use sweeping motion to layer insulation consistently ensuring the material is sufficiently broken up and adequately fluffed.

• Avoid compacting insulation. 

• Fill in "bald" areas to meet insulation height 

• Selected insulation must have a flame spread and smoke development index of 25/450 or less when tested in accordance with ASTM E84 or UL 723 

6. Insulate around heat shields and access

• Install insulation against attic dams and heat shields. 

• Insulation level must be 2" below the top of heat shields, Insulation Dams and baffles. 

• Do not get any insulation inside baffles or heat shields. 

7. Install certificate

• Fill out insulation certificate and post in electric panel

• Certificate shall include: Insulation Type, Coverage Area, installed thickness and minimum settled thickness, 

• Number of bags installed in accordance with manufacturer specifications 

8. Worst case draft test

• Conduct a Worst Case Draft Test to verify Category I, II and III appliances are venting safely before leaving home for the day. 

• Testing shall be recorded using the WAP Worst Case Draft Test from.