Daily weather like rain, snow, humidity and the hot summer sun combined with dust and dirt that’s carried by the wind is the ultimate mix for tarnishing your home’s curb appeal. Your home may not look dirty after the first humid and sunny day or even a week. However, after a few months, the effects of weather and impurities in the air will definitely show on your roof and facade. While a deteriorating curb appeal of your home is a problem, it’s certainly not as significant as the microorganisms that will start nesting on your home’s outdoor surfaces. A dirty roof and facade is the perfect breeding ground for microorganisms like fungi, mold, moss, and algae. Over time, they’ll create huge colonies and start to eat away at your roof shingles, facade, and wood deck causing significant structural damage.