Non-Joisted Floors Batt Insulation

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

Verify all plumbing and ductwork will be inside the thermal boundary

Verify that existing floor air barrier is smooth and is not ribbed or fluted metal decking material

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

Remove any existing insulation or vapor barrier materials from installation area

Install flags that can be seen below the insulation level at any utility junctions that will be covered by insulation

Install batts over 100% of accessible area to prescribed R-value in full contact with the air barrier and all structural framing without gaps, voids, compressions, or misalignments

If vapor retarder facing exists, install it facing the conditioned area

Install a support system for batt insulation that is mechanically fastened to the floor deck and supports the batt insulation without compression and has a minimum service life of 20 years

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