The price of glass wool board versus rock wool board can vary depending on several factors such as quality, thickness, density, manufacturer, and market conditions. However, in general, rock wool tends to be slightly more expensive than glass wool due to differences in production processes and raw materials. Rock wool is made from volcanic rock, whereas glass wool is made from recycled glass fibers. The manufacturing process for rock wool is typically more energy-intensive and involves higher temperatures, which can contribute to its higher cost compared to glass wool.
Additionally, rock wool often has superior fire resistance and sound absorption properties compared to glass wool, which can also contribute to its higher price. However, it's essential to note that prices can vary significantly based on regional differences, supplier pricing strategies, and other market factors. It's best to consult with suppliers or conduct market research to get accurate pricing information for your specific needs and location.