Identifying whether window rot has moved beyond the sill into your wall framing is a critical step in any exterior repair. To determine the extent of the damage, we recommend following these inspection steps:

• Probe the Area: Use a tool to check for soft or spongy wood around the interior and exterior of the window frame. If the wood gives way easily, the decay is likely deep.
• Look for Visual Indicators: Carefully inspect the framing inside the wall for water stains, black spots indicating mold growth, or darkened wood.
• Check for Structural Sogginess: If parts of the internal framing feel soggy or crumbly to the touch, moisture has compromised the structural integrity of the wall.

If you discover any of these signs, it means the structural framing is compromised. In these cases, the underlying issue must be addressed before any surface-level sill repairs proceed. Because this involves the structural stability of your home, we advise that you call a licensed professional to evaluate and address the damage properly.

Please note: Estimates are preliminary and subject to change after site inspection and a full scope review. Project outcomes and timelines may vary based on site conditions, permitting, material availability, and unforeseen issues. Please consult a licensed contractor for definitive advice and verify licensure with the Colorado Department of Regulatory Agencies (DORA).

• How to Fix a Rotted Windowsill: Step-by-Step DIY Repair Guide