Apply a bead of foam compatible glue to it and attach it to the plywood hatch.
Build insulated attic hatch.
To insulate an attic hatch you need weather stripping rigid foam board and fiberglass batt insulation.
Since the weather is getting colder by the day up here in the northern hemisphere i had to qu.
First install foam weather stripping on the inside of the trim or directly onto the hatch.
Attach foil insulation board to the back of the attic hatch panel.
Foil faced polyiso is the greenest and best performing of the rigid foam options.
Insulating the attic hatch.
I glued the foil board to the door hatch and used screws to hold it in place.
Cut out two pieces of rigid foam board that are 1 4 inch smaller than the hatch so homeowners can slide the attic access panel open easily.
Insulate the hatch cut foam board to 1 2รข less than the size of the hatch on each side.
This ible is about how to build an insulated attic hatch for cheap i am currently renovating an old building to turn it into a multi flat rental property.
In addition there are many do it yourself methods and materials available for customized thermal sealing of attic openings.