R-19

Cold weather is on its way, so we are sealing up an exposed wall adjacent to Jennifer's living space. Should be snug now, the tricky part was the random widths between the studs. When they built the house over 100 years ago, they weren't planning for 14.5 inch insulation batts. So some of the cavities are 16 inches wide, some are 12. Makes for an interesting afternoon.
Another interesting thing: the two by fours. They are actually two by four inches.