R13 insulation is commonly used in exterior walls, floors, and crawl spaces where moderate insulation levels are needed.
Mold on insulation often appears as black, brown, or greenish discoloration and is accompanied by a musty, dank odor.
The high cost of home insulation primarily stems from the expensive extraction and transportation of raw materials, such as rock or oil. Additional costs accrue during manufacturing, which involves high expenses related to energy consumption and labor, reflecting the overall intensive nature of producing effective insulation materials.