Final answer:
The primary drawback of using carbon fiber in architecture is its high cost. While it offers excellent strength and durability, the expense can be prohibitive for many construction projects.
Step-by-step explanation:
One drawback to using carbon fiber in architecture is its high cost. Carbon fiber is known for its strength-to-weight ratio and durability, making it an attractive material for various architectural applications. However, these benefits come with a significantly higher price tag compared to traditional materials such as steel or concrete. The cost factor can be prohibitive for some projects, especially when large quantities of the material are needed. Despite being resistant to corrosion and having a high tensile strength, the budgetary considerations often limit the use of carbon fiber in construction.