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I’m finishing my basement and thought about insulating the walls. Picture of my basement attached. The house is about 22 years old. Poured in place concrete walls, no history of water. I started framing the walls and have them all up. What should I do here? Thanks I’m advance for your help.

  • An excellent question : Uninsulated, the finished wall will be cool/cold. But if you insulate the concrete will remain cool and moisture could / will condense on them , and rundown to the floor ( behind the finished wall.), I finished a basement in il – blacksmith37 Dec 21 '17 at 17:51
  • Continued --- I insulated the walls. I did it in the fall and we moved in spring; so I don't know if there was a condensation problem in the humid summer. – blacksmith37 Dec 21 '17 at 18:00
  • You need to tell us about your climate. How moisture is managed depends on where it's going. – isherwood Dec 21 '17 at 18:39
  • I live in VA, so we have all seasons. My basement is a full in ground basement, no windows etc. the temperature really stays the exact same all year around – J Bocook Dec 21 '17 at 19:43
  • what does your local building code say about basement wall insulation? – jsotola Dec 22 '17 at 5:33

Since you live in Virginia and it doesn't get very cold for extended periods of time and you said that the basement is fully below grade, insulating the basement may not be cost effective. The outside ground temperature from about 36" down stays approximately 55 degrees the year round. If you have a forced air furnace, you could install a couple heat supplies and returns. Depending on your end result of finishing your basement the supply registers could be located in the bottom of the supply duct work and the returns should be mounted near the floor level possibly in the furnace return ducting or elsewhere depending upon the basement layout. The supply registers would be open during the winter and closed in the summer. The returns would always be open. This would add some heat to the basement in the winter and assist with the cooling in the summer and keep the basement ventilated year round for comfort. I would probably just use styrofoam mounted tight against the walls and finished as you like. The styrofoam would be it's own vapor barrier. I would however ask builders in your area for their recommendations, first.

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