Building Science Articles Some Truths about Condominiums It’s Not the Rain, it’s the Humidity Window leaking got you freakin’? Water in your building? Sealing does not solve the problem. Problems with insulation, and water, in Chicago masonry buildings. Efflorescence, what is it and what causes it? Masonry Building Problems in Chicago. Problems with Older Brick Houses in Chicago. Bathroom Exhaust Fans. Water intrusion consultation for wet buildings and mold problems.