聚氨酯板保温好，岩棉板防火强，玻璃棉板便宜——按建筑用途对号入座。PU insulates best, rock wool resists fire, glass wool saves money — match the panel to the building.
围护板材占钢构厂房总造价的 10%–15%，但决定日常使用体验的大半。三种主流板材的选择逻辑：
聚氨酯（PUR/PIR）夹芯板：导热系数最低（约 0.022W/m·K），保温首选，冷库、恒温车间用 50–100mm；有防火等级差异，PIR 优于 PUR。
岩棉夹芯板：A级不燃，防火分区与防火墙部位必选；保温性能次于聚氨酯，相同保温效果厚度需增加约 30%，自重也更大。
玻璃棉卷毡 + 彩钢板：造价最低，适合对保温要求一般的普通仓库；高湿环境需配合防潮贴面，否则棉体吸水失效。
简单结论：恒温恒湿选聚氨酯、防火隔离选岩棉、普通仓库选玻璃棉。混合使用（屋面聚氨酯 + 山墙岩棉）在高标准项目中很常见。
Envelope panels are 10–15% of a plant's cost but drive most of the day-to-day experience. The logic for three mainstream options:
PUR/PIR sandwich: lowest thermal conductivity (~0.022 W/m·K), first choice for insulation; 50–100mm for cold rooms and climate-controlled shops; PIR outperforms PUR in fire class.
Rock wool sandwich: non-combustible Class A — mandatory at fire walls and compartment lines; insulation below PU, so thickness grows about 30% for the same R-value, and it's heavier.
Glass wool + steel sheets: lowest cost, fine for ordinary warehouses; in humid buildings add a vapor barrier or the wool saturates and fails.
Bottom line: climate control — PU; fire separation — rock wool; standard warehouse — glass wool. Mixing (PU roof, rock-wool gables) is common on high-spec projects.
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