1. Remove insulation

• Remove any existing insulation to gain access to any penetrations or bypasses

2. Prep surface

• Clean floor by vacuuming or sweeping away any debris that is existing as opportunity allows.

• This will help to properly apply sealant to air seal space.

3. Air seal floor

• Use appropriate sealant to seal joists, cracks, plumbing penetrations.

• Use backing or infill that will prevent sag or movement once sealing materials are installed.

• Sealant must be compatible with all adjoining surfaces.

4. Seal gaps with batt and foam

• Stuff large gap with fiberglass batt, and spray foam over the top to seal the surface of this plug.

4a. Seal gaps with rigid material

• Use rigid material such as drywall or wood sheathing for bypasses and other large openings.

• Secure to the floor using nails or screws.

• Seal around the edges of rigid material using appropriate sealant.

5. Seal wiring penetrations

• Look for cable and electrical wiring penetrations in floor assembly.

• Seal any wiring penetrations that go through panned joists.

• Use appropriate sealant to seal around wire penetrations

6. Seal plumbing penetrations

• Use appropriate sealant to seal around plumbing penetrations.

• If annular space (gap) around plumbing penetrations is greater than 1/2" use other methods "Seal gaps with batt and foam" or "Seal gaps with rigid material".

• Seal around plumbing penetrations that pass through panned joist spaces.

7. Duct penetrations

• Use appropriate sealant to seal around duct penetrations.

• Seal the edges of panned joist spaces and the knockouts of I-Joists that have been panned for return air.

• If penetrations is is greater than 1/2" use other methods "Seal gaps with batt and foam" or "Seal gaps with rigid material".

8. Open chases

• Use appropriate sealant to seal around open chasses.

• If gap around this open chase is too large. Use one of the methods "Seal gaps with batt and foam" or "Seal gaps with rigid material".

9. Photograph work

• Before reinstalling insulation take photos of area that will now be covered with insulation.

10. Reinstall insulation

• Reinstall insulation that was removed in step 1.

• Follow step from "Insulation: Batts" to properly reinstall these batts

11. 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.