What aspect of rigid roofing makes it heavier compared to other materials?

The aspect that makes rigid roofing heavier compared to other materials is primarily due to the type of materials used. Rigid roofing typically comprises substantial materials like concrete, metal, or high-density foam, which offer durability and structural integrity. These materials have inherent weight characteristics that contribute to the overall heaviness of rigid roofing systems.

While insulation properties, design, and coatings can influence performance and functionality, they do not significantly alter the fundamental weight of the roofing material itself. For instance, insulation can add some weight, but it usually does not compare to the weight of the rigid materials that form the base structure of the roof. Similarly, while coatings can enhance weather resistance or aesthetics, they generally do not contribute significantly to the overall weight of the roofing system. Therefore, the weight discrepancy is most directly attributed to the materials selected for the rigid roofing.