If you are installing a pull down set of stairs follow instructions that came with the unit.
How to frame an attic access opening.
The frame for the rough opening requires four sides.
Build a box to frame the opening with lumber boards the same depth as floor joists.
Use an electric screwdriver to drive screws in the framing as well.
In this video i will show you how to build and install a attic access door.
Nail this framing into place around the perimeter of the attic access opening.
An attic door is helpful for keeping cold and damp air away from the main rooms of the house but sometimes the attic door just doesn t fit well with the hole cut in the attic floor.
The headers make up two of those sides.
To solve this consider installing a frame around your attic door.
If your ceiling joists are spaced so that they make up the other two sides of the rough opening check the opening for squareness by measuring across the diagonals.