Explore Westonci.ca, the top Q&A platform where your questions are answered by professionals and enthusiasts alike. Experience the convenience of getting accurate answers to your questions from a dedicated community of professionals. Experience the ease of finding precise answers to your questions from a knowledgeable community of experts.

Which material is most commonly used as a thermal insulator in building envelopes?
A) Concrete
B) Steel
C) Fiberglass
D) Copper