Alright let me first say i have never done any structure work to a house besides putting up vinyl siding , that is why i am asking you all this to better inform me on the steps i should take. I recently bought a house 3 or 4 months ago with a detached garage that is pretty much my shop. It measures 20×30 with a half bath. The shop and the house was built new 4 years ago. The walls are made of cinder blocks. The previous owner did not have insulation put up. In fact there is nothing up just the walls and the rafters on the ceiling. My question is if i were to try and insulate this shop what are the steps i should take? I dotn want an insane amount of insulation just enough to keep it bearable during the summer and winter. (i live in Ga, its 110 today). Ive been doing some research and it seems like i would need to put Rigid foam insulation against the walls and then frame in the walls with 2×4s and dry wall? And when i was watching a show on DIY the other night they put the rigid foam, framed in with 2×4s and then put roll insulation between the studs, and then drywalled it in. Any help is appreciated. Bear with me!