Batt insulation is by far the easiest insulation to install — poorly. This intro tells the basics of installing it right.
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
When bridging an opening in the base cabinets, don't rely on the wall to dictate cabinet placement. Use a straightedge to align the faces of the cabinets on either side.