Why Roof Leaks Can Appear Due to Structural Movement or Building Settling
Part of the ROOFNOW™ Roofing Knowledge Center
Buildings move over time due to settling, thermal expansion, snow load, and foundation changes. This movement can gradually open pathways for water intrusion.
Differential Movement
Roofs, walls, and structural elements expand and contract at different rates. These differences stress flashing, fasteners, and seams.
Seasonal Load Shifts
Snow loads, freeze–thaw cycles, and wind forces can temporarily deform roof assemblies, allowing water entry during certain conditions.
Why Leaks Appear “Suddenly”
Movement-related leaks often develop slowly, but only become visible once tolerances are exceeded.
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