Which action is most likely to solve the problem of lower-floor rooms feeling cold while upper-floor rooms feel hot?

Which action is most likely to solve the problem of lower-floor rooms feeling cold while upper-floor rooms feel hot?

• A. Air seal the roof
• B. Increase attic insulation
• C. Install more windows
• D. Close damper on some floors

Answer: (B)

When lower-floor rooms feel cold and upper floors feel hot, the issue is how heat moves through the building and how well the ceiling-to-attic area resists that transfer. Heat naturally rises and can leak through a poorly insulated ceiling into the attic. If the attic has little insulation, a lot of heat escapes upward, leaving lower floors chilly while the space above gets warm. Adding more attic insulation raises the resistance to heat flow at the ceiling. With a thicker, better-insulated ceiling, less warm air slips into the attic, so the lower floors stay warmer and the upper floors don’t become as hot. It addresses the root path of heat loss and helps balance temperatures across floors, improving comfort and efficiency. Air sealing the roof could help with leaks, but it doesn’t reduce heat transfer through the ceiling as effectively as adding insulation. Installing more windows would likely worsen the problem by increasing heat gain and loss, and closing dampers changes airflow without fixing the underlying heat transfer issue.

When lower-floor rooms feel cold and upper floors feel hot, the issue is how heat moves through the building and how well the ceiling-to-attic area resists that transfer. Heat naturally rises and can leak through a poorly insulated ceiling into the attic. If the attic has little insulation, a lot of heat escapes upward, leaving lower floors chilly while the space above gets warm.

Adding more attic insulation raises the resistance to heat flow at the ceiling. With a thicker, better-insulated ceiling, less warm air slips into the attic, so the lower floors stay warmer and the upper floors don’t become as hot. It addresses the root path of heat loss and helps balance temperatures across floors, improving comfort and efficiency.

Air sealing the roof could help with leaks, but it doesn’t reduce heat transfer through the ceiling as effectively as adding insulation. Installing more windows would likely worsen the problem by increasing heat gain and loss, and closing dampers changes airflow without fixing the underlying heat transfer issue.