How to stop heat loss through an attic hatch or open carport

What the numbers show

Counted from the threads quoted below. How we count

• The most recent one is from October 2026.
• It is not one crowd: 3 people on Reddit and 1 on Stack Exchange ran into the same thing.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

1. 1
   Adding radiant barrier rolls to studs
2. 2
   Insulating the ceiling line of the living space instead
3. 3
   Installing a drywall fire break or vapor barrier
4. 4
   Using foam board on top and weather stripping around the outside.
5. 5
   Buying a pre-made blanket tent for the hatch.
6. 6
   Building an open box out of rigid foam board with foil facing and foil tape.
7. 7
   Gluing regular fiberglass insulation to the back side of the hatch using spray adhesive.

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.