Basement- how much insulation do I need
So trying to create a playroom in unfinished basement for kids. I attached a picture of general layout. The main room I want to keep comfortable is 23 by 13.5, not including a wall I plan to build to separate furnace. I have 2 ft thick concrete wall that separate areas in basement. In 2 years I’m adding an addition and basement will be attached to garage on wall away from stairs. So a few questions:
1. Interior concrete walls do I use 1 in foam board to separate framing and wall or skip insulation and just leave in 1 inch air gap.
2. If an entire exterior wall will be attached to addition in 2 years, hence making it an interior concrete wall do I still insulate and frame that wall.
3. Is it more cost effective for me to just heat this room for 2 years without insulation and make floor more comfortable for kids until addition is put in. Also if I go this route concrete wall is rough and needs work. Do I re stucco the walls or use some other material just to make walls more kid friendly
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