Massachusetts Unrestricted Construction Supervisor License Practice Test

What aspect of building construction does the U-factor measure?

1. Thermal transmittance

2. Mechanical strength

3. Air leakage

4. Water penetration

The correct answer is: Thermal transmittance

The U-factor measures thermal transmittance, which is a crucial property in building construction. This parameter indicates the rate at which heat is transferred through a building component, such as walls, windows, or roofs. A lower U-factor signifies better insulating properties, meaning that less heat is lost or gained through the building envelope, leading to improved energy efficiency. Understanding the U-factor is essential for energy calculations in buildings, as it helps in assessing the overall energy performance and in designing systems that will maintain comfortable indoor temperatures regardless of external weather conditions. This information is vital for compliance with energy codes and standards, aiding builders in minimizing energy costs and enhancing sustainability in construction practices.