Yes, your attic is insulated, but the access hatch probably isn’t. Here are a few ways to insulate the attic door, save energy, and save money.
2 SIZES: 22x54, and 25x54., A MINIMUM OF R-30 to R-49 is now required for new construction and renovation in accordance with 2015, 2018 IRC Section
Battic Door Attic Stair Cover
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Ask This Old House, E19, Attic Insulation, Parking Spot, Ask This Old House, Season 21, Episode 19
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Insulating a Crawl Space/Attic Door for Improved Energy Efficiency
Insulating walk-in attics
Insulation Granulate
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Types of Insulation for Your Home - This Old House