Greenawalt Roof | Roofing Services in Allentown, PA 18101

Allentown's climate, with its freeze-thaw cycles, humidity, and precipitation, accelerates the corrosion of metal roof flashing. This is especially true for older installations or flashing made from less durable materials. Once corroded, flashing loses its ability to create a watertight seal around chimneys, vents, and roof joints, which is a primary cause of leaks we see in local homes. We inspect and replace compromised flashing with modern, corrosion-resistant materials suited for our area's weather.

A roof valley is where two roof planes meet, forming a channel for water runoff. In Allentown, leaks here are often caused by worn or damaged valley flashing, improper installation, or a buildup of debris like leaves and ice dams that force water underneath shingles. Our repair process involves clearing the valley, inspecting the underlying flashing and decking for damage, and applying a proper, watertight solution—which may include replacing the valley metal or installing a high-quality ice and water shield—to ensure water is safely channeled away from your home.

Absolutely. A key part of our roof replacement service for Allentown homes is proactively addressing these vulnerabilities. We use wider, more durable valley flashings, install premium ice and water shield in critical areas (especially in valleys and along eaves), and ensure all step and counter flashings are properly integrated and sealed. This approach, tailored to our local conditions, builds a more resilient roof from the start, giving you long-term protection against the leaks commonly caused by flashing failure and valley issues.