Uninsulated building component
Properly insulated building component
Clear work area of any debris or clutter
Follow work order guidance on air sealing area before insulating.
For other reference see sections listed below:
Install unfaced batts so the sides are touching the framing and interior surface
Make sure not to compress the insulation.
Cut batts to fit neatly around pipes and outlets so it is not compressed.
Split batt around wiring to prevent compressing the insulation
Secure batt by following methods:
Install wood lath to joist approximately 12 inches apart for joist 24 inches on center and 18 inches apart for joist 16 inches on center;
Or secure by installing non-stretching polypropylene or polyester twine.
Install twine in a zig-zag pattern, use power driven staples12 inches apart for joist 24 inches on center and 18 inches apart for joist 16 inches on center.
If batt size does not fill the entire cavity it needs to be securely installed against the surface being used as the air barrier.
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
As a best practice we recommend not using faced batts.
If faced batts must be installed, the faceing should be installed toward the conditioned side of the envelope
Batts exposed to interior living space must be:
Covered with minimum half inch drywall or other material that has a ASTM flame spread rating of 25 or less
OR, covered with an air barrier such as house wrap to prevent R-value degradation by convection and to prevent occupants from being exposed to insulation fibers.