Prefab Steel Structure Products

● High-quality PU sandwich panels typically have a service life of 20 to 30 years in normal industrial and commercial applications. ● The lifespan of PU sandwich panels depends on steel facing quality, PU core density, coating protection, installation quality, and environmental exposure. ● In coastal, high-humidity, or corrosive areas, PU sandwich panels may age faster if the coating and sealing system are not properly specified. ● Proper joint treatment, fastener installation, drainage design, and routine inspection can significantly extend the service life of PU sandwich panels. ● Compared with many conventional wall and roof systems, PU sandwich panels offer a strong balance of thermal insulation, construction efficiency, and lifecycle durability.

● PU sandwich panels usually provide stronger thermal insulation at a thinner panel thickness than rockwool panels. ● Rockwool panels are typically preferred when fire resistance and sound absorption are the highest priorities. ● In humid or temperature-controlled projects, PU sandwich panels often perform better in moisture resistance and enclosure efficiency. ● Rockwool panels are heavier, which can influence handling, installation speed, and support structure design. ● The better choice depends on the building’s fire code, insulation target, operating environment, and lifecycle priorities.

● Sandwich panels can often be repaired without replacing the entire roof. ● Most leaks start at joints, screws, flashing, or roof openings rather than the panel core. ● Local sealing, refastening, and patch repair work well when damage is limited. ● Wet insulation, crushed joints, or repeated leakage usually point to panel replacement. ● Repair quality depends on drainage, detailing, and compatible replacement materials.