Residential HVAC Installation Practice Exam 2025 - Free HVAC Practice Questions and Study Guide

One of the most commonly used characteristics of building construction materials is the R-Value. R-Value is a measure of the resistance of a material to heat flow. It indicates how well a material insulates against heat transfer. The higher the R-Value, the better the material is at insulating. This makes R-Value an important factor to consider when selecting construction materials for homes and buildings.

The other options mentioned are not commonly used characteristics of building construction materials. K-Value, U-Value, and Q-Value are not standard measures used to describe the insulating properties of building materials.