Ok, so we are getting on with the project and now it is time for the walls. So, here is what we have. The existing walls consists of studs (2x4) sideways around the windows and door. In order to make the room a bit more efficient, we are extending the walls to make it thicker and in the process add more insulation. At this point I need hints, pointers, ideas, and help that you can provide on how to I go about it. The lower part of the walls (below the window) will be extended an extra 8" to cover a "step" that was there and also to give a wide window sill. The remaining (side of windows and top) will be extended 4". The wall in question here has 3 windows and is angular, sort of like a bay window, but much larger. The other wall in question is where the door and one window are located. I hope this will help you help me.
Thanks. Be well