Weatherstrip the edges and put a piece of rigid foam board insulation on the back of the door.
How to insulate attic hatch with sliding stair.
Treat the attic door like a door to the outside.
Since the weather is getting colder by the day up here in the northern hemisphere i had to qu.
Attach foam tape weather stripping to the top edge of the box to form a tighter seal.
Cut a piece of fiberglass or rigid foam board insulation the same size as the attic hatch and nail or glue it to the back of the hatch.
Tape the lid to the top of the box along one of the long edges with foil tape.
An attic stair cover looks a little like a rectangular tent made of foil and is placed right behind the attic hatch door.
If you have pull down attic stairs or an attic door these should be sealed in a similar manner.
These covers usually come fully assembled and are easy to install and remove.
Apply a bead of foam compatible glue to it and attach it to the plywood hatch.
Pre made insulated attic stair covers are also available from local home improvement centers or on the web.
They also come with zippers in order to grant easy access to the attic.
Insulate the hatch cut foam board to 1 2รข less than the size of the hatch on each side.
Foil faced polyiso is the greenest and best performing of the rigid foam options.