How can I make my exterior walls more energy efficient?
I would like to make the exterior walls of my home more energy efficient. My home is, as shown on your climate zone map, in zone 4a. It is about 1 hour south of St. Louis on the Illinois side. I currently have a 100 + year old home with no insulation in the 2×4 stud bay. The home currently has the original shingle siding, then a layer of 1/2 inch xps, and finally vinyl siding. Removing the siding is not an option in my foreseen budgeting plans so I would like to add to the interior of the home. I am planning to remodel most of the interior anyways so removing the sheet rock/ left over plaster to access the stud bay would be ideal. I have read a great deal, on your website forum, about the option of first insulating the stud bays with a bat style insulation and then adding rigid foam boards to the interior of the stud bay. I do like the idea of this but i’m concerned of moisture build up in the wall bay. I have been unable to find my specific wall situation, meaning the shingles, xps, and vinyl siding, on your forum. Could you please give me your professional recommendations for increasing the efficiency of my home walls? Thank you very much in advance for your time.
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