some funny stuff happening with my above-garage apartment and trying to figure out what's going on. note that i've had a certified electrician come out and have a look and he was not able to conclude anything specific, but did confirm that he doesn't see any loose wires anywhere and breaker...

I have a cement block house in Baja, with no insulation. Winter temps range from the 30a at night to the 60a during the day. The house stays very cold all day. How do I insulate it?