By-Material
Insulation Materials – Compare Types of Insulation Material
Insulation materials are used to control heat, sound, and fire performance in buildings. Each insulation material differs in thermal performance, acoustic properties, fire rating, durability, and handling, which affects where and how it should be used.
Note: If you already know where the insulation will be installed (roof, ceiling, wall, or floor), view our By Application pages. This section compares insulation materials based on what they are made from.
Mineral Wool Insulation Material
Mineral wool is a broad insulation category that includes glasswool and stone wool products. These materials are manufactured from mineral-based raw materials and are widely used across residential, commercial, and industrial applications. Mineral wool is valued for its thermal performance, acoustic properties, and fire resistance, with specific characteristics varying depending on the material type.
Explore options → Mineral Wool Insulation
Glasswool Insulation Material
Glasswool is a high-performance thermal and acoustic insulation material manufactured from recycled glass and sand. It delivers excellent R-values, consistent long-term loft and a non-combustible fire rating, making it one of the most widely used and trusted insulation materials for South African homes, offices and commercial buildings. It has a combination of strong thermal performance, fire safety and affordability.
Explore options → Glasswool Insulation
Stone Wool Insulation Material
Stone wool is a high-density insulation material manufactured from volcanic rock. It is non-combustible and designed for applications where fire resistance, acoustic performance, and temperature stability are required. Stone wool is commonly used in commercial, industrial, fire-rated, and soundproofing applications where higher strength and performance are needed compared to lightweight materials.
Explore options → Stone Wool Insulation
Polyester Insulation Material
Polyester insulation is a soft, non-irritant material made from recycled PET. It contains no loose fibers, offering a comfortable installation experience for homeowners who prefer a non-itch product. Polyester provides lower R-values, B-class fire classification, less acoustic performance, and a higher cost compared to glasswool, but it remains a popular choice for those prioritizing non-itch during installation.
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Reflective Insulation Material
Reflective foil products are designed to reduce radiant heat under metal and tiled roofs by reflecting heat away from the roof cavity. Commonly used alongside bulk insulation to improve summer performance, assist with moisture and condensation control, and help stabilize indoor temperatures. This makes them a valuable supporting layer in both residential and commercial roof systems.
Explore options → Reflective Foil Insulation
Polystyrene Insulation Material
XPS polystyrene is a rigid, closed-cell insulation board offering reliable thermal performance, strong compressive strength and very low moisture absorption. It provides a firm, durable and long-lasting insulation layer that stays stable over time, making it a practical choice for ceilings, certain roof applications, walls, floors, and areas where a solid panel is preferred over a soft roll. It provides excellent insulation performance.
Explore options → Polystyrene Insulation
Which Insulation Material Should You Choose?
Every insulation material performs differently, so the right choice depends on what you value most:
- Highest r-value → Glasswool / Mineral wool
- Best soundproofing → Glasswool / Mineral wool
- Highest fire rating → Glasswool / Mineral wool
- Affordable pricing → Glasswool
- Non-itch installation → Polyester
- Heat reflection → Reflective Foil
- Moisture barrier → Reflective Foil
For room-by-room suggestions, visit our By-Application pages.
Where to Go Next
- Explore all insulation types → Insulation
- Explore insulation applications → By-Application
- Browse all brands → Insulation Brands
- View our homepage → Insulation Warehouse