Advantages

• Cost (relatively cheap).
• Lightweight.
  
• Moisture resistance.
  
• Chemical resistance.
  
• Thermal conductivity.
  
• Electrical properties.
  
• High strength

Disadvantages

• Inhaled slivers of fiberglass irritate the alveoli and can cause lung disease.
• There is some data which suggests fiberglass in the lungs may cause cancer, by slicing DNA and causing cell mutation, in the same way as mineral wool.
• Some fiberglass still uses formaldehyde as a binder, which leaks out into the air. This product may also cause cancer.
• Resin binder Bad Smell. Vapor impermeability may require ventilation detail.