Window replacement, especially in Chicago, is much more needed than other climates due to the extreme weather changes. As expected, windows do take a lot of the beating from the winter weather, however many people overlook the condition of the masonry when replacing their windows.
The brick, like the windows, are exposed to the outside elements and must withstand the extreme weather condition as well. Because of this, the professionals you have chosen to replace your windows must be knowledgeable and experienced enough to make the right assessment on whether or not the brick should be replaced as well.