The costs of using rock wool sandwich panels compared to other insulation or building materials over the long term can vary depending on various factors such as initial installation costs, maintenance requirements, energy savings, and lifespan. 

Initial Installation Costs: Rock wool sandwich panels may have higher initial installation costs compared to traditional insulation materials like fiberglass or polystyrene foam. However, these costs can be offset by other long-term benefits.

Energy Savings: Rock wool sandwich panels offer excellent thermal insulation properties, which can result in significant energy savings over the lifespan of a building. By reducing heat loss in the winter and heat gain in the summer, buildings with rock wool insulation can require less energy for heating and cooling, leading to lower utility bills over time.

Durability and Maintenance: Rock wool sandwich panels are durable and require minimal maintenance over their lifespan. Unlike some other insulation materials, rock wool is resistant to moisture, mold, pests, and fire damage, reducing the need for costly repairs or replacements.

Lifespan: Rock wool sandwich panels have a long service life and can retain their insulation properties for decades without significant degradation. This longevity can result in lower lifecycle costs compared to materials that may require replacement or upgrading sooner.

Life Cycle Assessment (LCA): Conducting a life cycle assessment can provide a comprehensive evaluation of the environmental and economic impacts of different insulation materials over their entire lifespan. This analysis considers factors such as raw material extraction, manufacturing processes, transportation, installation, use phase, and end-of-life disposal or recycling. While initial costs may be higher for rock wool sandwich panels, their energy efficiency, durability, and recyclability may result in lower overall environmental impacts and total costs compared to other materials.