I would truly appreciate any advice anyone could offer on insulating the walls of our garage. The wall of the house adjoining the garage is always freezing cold in winter and warm in summer. The interior of the wall on the house side seems to be a thick, uneven (not smooth) coat of painted cement. The rooms adjoining the garage are a laundry room and half-bath, which though heated are freezing in winter. We live in a 1952 brick Cape Cod with an attached single garage. The interior of the garage walls are made from cement blocks and some bricks. What we would like to do is insulate these walls, especially the one adjoining the house. Can we attach say 2x2's to the cement block (with nails or screws?); then fit pieces of that dense, rigid styrofoam between these small studs, and finally apply a sheathing, over the studs and styrofoam, such as 0.25 inch plywood that can be painted? Do I need to install any type of vapour barrier? If so, where? Should I use pressure treated lumber for the studs given that it's in the garage? There are no moisture issues.
Thanks in advance :)