Water damage near joist

Below is what our roofing expert John Kenney with Cotney Consulting Group had to say in response to your question:

Sharon, what you’re describing does sound like normal aging rather than an active problem. It is common for a 15-year-old roof to naturally show signs of wear in areas like valleys, primarily where water flow is concentrated. Minor surface discoloration, oxidation on metal flashing, or small cracks in sealant are typical with age and weather exposure.

During your investigation, you have confirmed that the key indicators are dryness and stability. A moisture reading of 1.5% is excellent and indicates no hidden water intrusion. I would continue monitoring the area during periods of heavy rain and ensuring the valley remains debris-free.

If you ever notice staining, softening of the timber, or raised fasteners, it could signal early deterioration or a flashing issue developing over time. Otherwise, it’s safe to consider what you see as routine, age-related wear. Preventive maintenance like cleaning, inspecting sealants, and ensuring proper drainage will help extend the roof’s life well beyond its current age.

The bottom line is that dry wood, clean valleys, and consistent readings like yours point to a roof that’s aging normally, not one that needs repair.

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