Insulation: Dense Pack

Before

Missing insulation along the top of each cavity

After

Continuous insulation in the wall

Steps

  1. Determine Lead Safe work

  • Review work orders to determine if Lead Safe RRP is required.

  • When required, follow RRP guidance as listed in the LEAD Safe work measure.

2. Prep work site

  • Depending on the location of the work you will need to work with the client to:

  • Clear furniture and belongings away from exterior walls.

  • Use drop cloths and other measures to protect the client's belongings.

  • Move obstructions around the outside of the home as need for access.

3. Inspect walls interior and exterior

  • Look for any hidden holes or openings in cavity. (e.g. behind posters hanging on the wall)

  • Drywall must be a minimum thickness of 1/2" for 16" framing, or 5/8" for 24" framing

  • Panels must be able to support the weight of dense pack.

  • Surface material shall cover 100% of the cavity.

  • If major repair is needed, coordinate with auditor to see if incidental repairs can be justified.

4. Drill hole for access

  • Steps 4a -4f are examples of how to access the various types of walls you will be insulating

4a. One hole method

  • Drill a 2 1/2" diameter hole near center of wall cavity.

  • One hole may be acceptable to fill an entire space if fire blocking or other obstructions are not in the cavity

4b. Two hole method

  • Drill a 2 1/2" hole at the top third and lower third in each wall cavity

4c. Chair rail method

  • Chalk a line at chair rail height

  • Drill the 2 1/2" holes along the chalk line

  • Once the wall is insulated install foam plugs in holes.

  • Install chair rail molding over holes

  • Caulk on top and bottom of chair rail.

4d. Exterior Siding Method

  • Remove one row of siding that runs the full length of the wall for access to exterior sheeting .

  • Drill a 2 1/2" hole between each wall cavity

4e. Balloon framed walls

  • Install blocking at the bottom and top of wall cavities

  • Send fill tube down the wall cavity from inside attic when possible

  • Otherwise block both the top and bottom of each wall cavity and do a standard drill and fill.


4f. Unfinished Spaces: Add netting

  • Staple netting to studs or joists with 1/2" crown staples no more than 2" apart.

5. Check for blocking in the wall

  • Use an infrared camera, See-snake, plumbers tape or other method to verify if the wall has blocking in it.


6. Fill cavity with insulation

  • Fill cavity to achieve manufacturers specified density.

  • With machine turned off work hose nozzle until it reaches the far end of the cavity, then pull back a few inches.

  • Start material fill.

  • Fill space and pull back when material is no longer being moved through hose.

  • Probe the nozzle into different areas of the cavity and use multiple angles to fill the cavity with as much material as possible.

7. Patch and seal holes

  • Sheetrock walls: place a foam plug in the hole and finish with one coat of sheet rock mud

  • Paneling or exterior walls: Caulk a plastic plug in place.

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 Utah WAP Worst Case Draft Test form.

9. Install certificate

  • A dated insulation certificate signed by the installer will be posted on a wall in the space where the furnace is located, a utility room or an approved location inside the building.

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

  • Number of bags installed in accordance with manufacturer specifications