Fire boards vs sprayed mortar in fire protection for tunnels
26/05/2026
Aestuver fire protection systems for tunnels and sprayed mortar systems can both be used to protect tunnel structures against severe fire exposure, but they behave very differently in installation, quality control, durability, repairability, and site logistics. A technically rigorous comparison shows that board-based systems are fundamentally more deterministic and construction-friendly, while sprayed mortar systems are far more sensitive to workmanship, environmental conditions, and downstream operational damage.