Insulating old walls

My home is a circa-1930 wood frame in NYC, with an extension that was probably added sometime in the 40’s. The extension appears to be double layer brick, with stucco… My home is a circa-1930 wood frame in NYC, with an extension that was probably added sometime in the 40’s. The extension appears to be double layer brick, with stucco…Read MoreGreenBuildingAdvisor