Desired Outcome:
Continuous, contiguous, safe, and compliant thermal boundary that prevents air movement @ 50 Pascals
SWS Detail: 4.0102.3 Inaccessible Ceilings - Dense Pack; 4.0103.6 Accessible Attic - Dense Pack Insulation; 4.0104.1 Knee Wall Dense Packing; 4.0201.3 Dense Pack Insulation: Accessible Walls ; 4.0202.1 Dense Pack Insulation: Enclosed Walls; 4.0301.4 Dense Pack in Joisted Cavities With Rigid Barrier; 4.0302.3 Dense Pack Exposed Floors with Rigid Barrier;
Author: Brenna
Before
Missing insulation along the top of each cavity
After
Continuous insulation in the wall
Steps
- 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