What Are the Benefits of Regular Exterior Cleaning in Connecticut Buildings It usually starts with small signs. A faint layer of dirt on the siding, dark streaks near the roofline, or slippery patches forming along walkways. Many homeowners and property managers notice these changes but delay cleaning, assuming it’s only cosmetic. Over time, though, these minor issues can quietly lead to bigger problems, especially in a climate like Connecticut’s where moisture, seasonal debris, and temperature shifts take a toll on building exteriors.