+Building insulation is a material or system designed to slow the passage of [Heat Transfer](/wiki/heat_transfer) through walls, roofs, and floors. It creates a thermal envelope, maintaining stable indoor temperatures and significantly improving [Energy Efficiency](/wiki/energy_efficiency).
+## See also
+- [Thermal Mass](/wiki/thermal_mass)
+- [Green Building](/wiki/green_building)
+- [HVAC](/wiki/hvac)
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