How much does perlite expand when heated to 1500-1650 degrees?

When perlite is heated to temperatures ranging from 1500 to 1650 degrees Fahrenheit, it undergoes a significant expansion due to the rapid vaporization of moisture trapped within its mineral structure. This heating process causes the perlite to expand anywhere from 7 to 16 times its original volume, making it much lighter and more suitable for various applications, such as insulation, lightweight aggregate in concrete, and horticultural products.

The ability of perlite to greatly increase in volume is crucial for its use in the roofing industry, as it enhances thermal insulation properties, reduces weight on structures, and improves fire resistance. Understanding this expansion is essential for roofing professionals when choosing materials for specific applications to ensure they meet necessary building codes and performance requirements.