Aluminum honeycomb: cell size, grade of aluminum, depth of the material, and thickness of the cell wall are all variable that can vary based on different application and requirements
Advantages:
- High fire resistance
- Very well accepted by FM
- Low weight/high strength
- Mechanical stability
Negatives:
- Higher cost
- Low thermal and noise insulation
Styrofoam is a trademarked name for a specific form of insulation manufactured by The Dow Chemical Company; "styrofoam" is not synonymous with "polystyrene;" polystyrene is a vinyl polymer
Advantages:
- Very good insulation performances (noise and heat)
- No problem if exposed to installer during cutting for modifications on site
- Very good mechanical stability
- Competitive price
Negatives:
- Fire resistance not as good as other insulating material
- FM requires stricter anti fire measures if polystyrene is used.
- Due to fire resistance codes, it requires enclosing structure
Rockwool: a mass of fine intertwined fibers with a typical diameter of 6 to 10 micrometers; mineral wool may contain a binder and an oil to reduce dustingand making it water repellent (hydrophobic)
Advantages:
- Good insulation performances (noise and heat)
- Good fire resistance performance; well accepted by FM
Negatives:
- Poor mechanical stability performance; it normally requires enclosing and supporting structure
- Light precaution must be taken if operators are exposed to rock wool fibers
Polyurethane: a polymer consisting of a chain of organic units joined by urethane,used for this purpose as rigid foam
Advantages:
- Good insulation performances (noise and heat)
- No problem if exposed to installer during cutting for modifications on site
- Very good mechanical stability
- Competitive price
Negatives:
- Fire resistance not as good as other insulating
- FM may require stricter anti fire measures if polyurethane is used
- Due to fire resistance codes, it requires enclosing structure