Unverified84% confidenceDecision RuleTime unknown
选购前测量窗宽后应按窗宽×1.05再加两侧各15-20cm延伸量确定杆/轨长度，遮光帘需超出窗洞两侧使闭合时侧边不漏光；伸缩杆要选实际可调范围覆盖目标长度且预留≥10cm余量，避免拉到极限承重下降
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84%
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Long-term
Relevance
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Unverified买杆长度须按窗框左右各外延15-20cm计算总长（而非仅窗宽），遮光帘拉开时能完全避开窗户并减少侧漏光；伸缩杆购买要预留20%收缩余量避免顶到极限90% similarUnverified伸缩杆选购要让实际窗宽落在标称范围的中段而非极限值：如窗宽1.5米应选1.1-2米款而非最大1.5米款，杆体伸出越长内管重叠越少，承重和抗弯下降50%以上90% similarUnverified定制卷帘测量：内装量窗洞净宽减1-2cm，外装量窗洞外沿每侧加5-10cm并预留顶部安装高度10-15cm，先确定安装方式再测量避免尺寸报废88% similarUnverified窗帘宽度需按窗框实际宽度乘以褶皱倍数计算：轻薄褶皱1.8-2倍，普通2倍，高级饱满感2.5倍；高度需在窗框顶部上方15-20cm安装并落地或离地1cm防漏光87% similarUnverified轨道长度需比窗户实际宽度每侧多出15-20cm（共30-40cm），高度落地帘离地1-2cm、飘窗帘压窗台2-3cm；测量不留富余量会导致边缘漏光和视觉压缩87% similar
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