The access door also serves as a ceiling vent for removing fumes from the room to.
How to frame an attic access opening.
The frame for the rough opening requires four sides.
In this video i will show you how to build and install a attic access 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.
Nail this framing into place around the perimeter of the attic access opening.
Build a box to frame the opening with lumber boards the same depth as floor joists.
To solve this consider installing a frame around your attic door.
The headers make up two of those sides.
The measurements should be within 1 8 inch to be considered square see figure 13.
If you are installing a pull down set of stairs follow instructions that came with the unit.