Johnson Construction & Roofing | Roofing Services in Ottawa, IL 61350

Those black granules are a sign of shingle wear, a common issue we see in Ottawa. While some loss is normal over time, excessive granule loss—often accelerated by sun, wind, and temperature swings—exposes the asphalt underneath to UV damage, leading to cracks and leaks. It's a serious indicator that your roof's protective layer is failing. We recommend a professional inspection to assess the extent of the damage and determine if targeted repairs or a replacement are needed to prevent water intrusion.

In Ottawa, flashing corrosion is frequently caused by our freeze-thaw cycles and exposure to moisture, which can be compounded by improper installation or low-quality materials. Corroded flashing around chimneys, vents, and valleys is a major leak source. Our fix involves carefully removing the damaged flashing, preparing the surface, and installing new, high-grade metal flashing sealed with durable, waterproof materials. Proper installation is key to creating a long-lasting barrier that withstands our local weather.

It depends on the extent and pattern of the damage. We often perform successful repairs for isolated areas of granule loss or minor flashing issues. However, if the granule loss is widespread across the roof or the underlying decking shows signs of moisture damage, a full replacement may be the most cost-effective and secure long-term solution. We provide a honest, detailed assessment to help you make the best decision for your home's protection and your budget.