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Diagnosing Structural Deck Rot: How to Inspect and Repair Hidden Sub-Roof Decay

• September 12, 2026
• admin

When water infiltrates a sloped roof, it does not immediately manifest as a drip in the master bedroom. In well-insulated or multi-tiered building assemblies, water travels through complex interstitial pathways: tracking along purlins, absorbing into underlayment, and pooling silently across the structural decking substrate. By the time damp discoloration appears on an interior gypsum ceiling …