Expose the ceiling finish approximately 12" on all sides of the attic hatch.Cut batt insulation and adhere to the access cover. Size the batt insulation to fit within the opening joist space and over the top of the ceiling joists on all sides. Adhere weather stripping to the ledge of the access opening on all sides.Install rigid insulation around the opening. Size the rigid insulation so that the top edge is above the additional insulation level. Notch it to fit around joists and other framing.Replace existing insulation and install additional insulation around the rigid insulation.
Ensuring a proper air seal
Use latches around the attic hatch perimeter to ensure engagement of the edge gasket.
