You can control the bath fan and the light from the switch, automate with motion and sensor controls, or you can mix and match methods. You can even tinker at the switch
Houses cannot expand and contract with changes in pressure like balloons can. Instead, they need paths for air to balance the pressure
Stop air and water leaks at the side of windows by sealing the flange to the sheathing
Tie the walls to the foundation, the floor to the walls, and add shear strength for lateral support
A drone's-eye view of an ongoing remodeling project
This old-school method kills two birds with one stone.
Anchor the frame to the floor and reinforce hinge locations with frame anchors, otherwise, it's just plumb, level, and square.