I have a walk out basement with a knee wall along the front . I can feel the cold air coming in. The construction is 2-4 framing with T 111 exterior, the inside has r 13 kraft faced insulation with 2" of foam insulation board with the rest of the basement with 1" foam board on the walls. Air is still coming in and cooling the basement down. I have an outdoor wood boiler and the water comes in the house around 180* and cools down to 172 at the heat exchanger. The water then goes into the indoor boiler system at 162 and comes back at 150*. The pex pipe runs the length of the basement, 30 feet. The heat off the pex lines used to make the basement the warmest place in the house. The rest of the house is well insulated with newer windows. Now in 15* days and 2* nights the heat can't get above 60* and that's with the circulator pump running 24/7.
I want to spray foam insulation in all the knee walls but it is too cold for that. Any other thoughts for now? I hate to tear down the insulation board that's there now but I may have no choice. Any thoughts on getting a kit to spray it on my own or is it just as well to hire it out. I used to work with 2 part spray insulation, I know the part a stuff is a mess and that it needs to have the tanks at or above 70* to spray well.