Certified Healthcare Constructor (CHC) Practice Exam

Which building envelope material is the most expensive per square foot?

1. Masonry

2. Precast (tilt slab)

3. Curtain wall

4. Wood framing

The correct answer is: Curtain wall

The curtain wall is recognized as the most expensive building envelope material per square foot due to several factors. One of the primary reasons for its high cost is the complexity of its design and installation. Curtain walls typically consist of large panels of glass and metal framing systems that require precise engineering and skilled labor to install correctly. This complexity translates into higher labor costs and careful attention to detail during construction. Furthermore, curtain walls often incorporate advanced materials and technologies, such as thermal performance enhancements and high-performance glazing systems, which contribute to their higher price. The aesthetic appeal and ability to create expansive, unobstructed views also make curtain walls a desirable choice for many modern architectural designs, justifying their elevated price point. In contrast, materials like masonry, precast (tilt slab), and wood framing generally have lower costs associated with both materials and their installation. They are more traditional building methods that do not demand the same level of precision and specialized labor required for curtain walls. Therefore, while all these materials serve important roles in building construction, the unique attributes, design considerations, and installation requirements of curtain walls position them as the costliest option.