Why Did America Abandon the Roof That Cools Naturally?

Why did America move away from naturally cooling roofs that could reduce heat before it ever reached the attic? In this video, we explore how traditional terracotta clay tile roofs use more than just material. Their curved shape, thermal mass, reflective surface, and ventilated air gap work together to slow, separate, and remove solar heat before it enters the home. You’ll also learn: How above-sheathing ventilation helps carry heat away without fans or electricity Why some clay tile roof systems reduced peak heat flow by around 70% in Oak Ridge testing Why the famous 90% figure came from a complete roof system that also included insulation How asphalt shingles became dominant because they were cheaper, lighter, and faster to install Why old clay tiles can often be reused even after the supporting parts of the roof fail How modern lightweight roofing can copy part of the same cooling principle The real lesson is simple: the best roof does not wait for heat to enter the attic. It reflects, separates, and removes heat while it is still outside. If you enjoy forgotten building methods, passive cooling systems, and old technologies that still make sense today, subscribe to the channel. #PassiveCooling #ClayTileRoof #TerracottaRoof #RoofingTechnology #HomeCooling #EnergyEfficientHome #SustainableArchitecture #BuildingScience #RoofVentilation #HistoricArchitecture #AsphaltShingles #CoolRoof