Gutted living room - Electrical/Insulation question
Home is built in 1888 in NE Wisconsin. Gutted out the living room due to 2nd story bathroom leak prior to buying it. The room is around 24x35 with a 9ft ceiling. Once the wire/plaster combo was removed, I lost 1.5" of wall thickness which will have to be furred out to meet finished flooring. The siding has 1.5" foam board behind it. My questions are these:
1. Can I get away with R19? All the framing is 2x4... If I fur out the studs 2 inches could I use R19(6")? instead of R13(3.5")
2. If I do fur out and use R19, could I simply run the electrical between the strips of furring (in front of insulation)?