FAKRO LWT 66891 Wooden Thermo Attic Ladder with 12.5 R-Value for 22-Inch x 47-Inch Rough Openings Easy-to-install insulated wooden attic ladder for 22 x 47-inch rough openings Perfect for highly energy efficient projects; insulated with R-Value of 12.5 Adjustable to fit ceiling heights between 7 feet, 2 Inch and 8 feet, 10 Inch Well balanced door opens and closes easily with no sudden movements Maximum user weight of 300 pounds; backed by 2-year warranty