Why is it important to insulate and seal the attic access hatch in your home? Insulating and sealing your attic access hatch is essential for several reasons. One of them is energy efficiency. Especially during Minnesota winters. As we heat the air in our home, it will naturally rise towards the ceilings and upper levels. If an attic access hatch located on the ceiling is not well insulated and sealed, it will become a prime spot for the heated indoor air to make its way out