Unverified88% confidenceCautionTime unknown
遮光率与漏光是两回事：即使布料100%遮光，帘布与墙面间隙、罗马杆顶部、两侧边缘仍会漏光，全黑环境需搭配封闭式窗帘盒或L型侧挡+超出窗框15cm以上
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88%
Confidence
Long-term
Relevance
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Unverified窗帘遮光要靠边缘密封而非布料本身，四周漏光会大幅降低实际遮光效果；追求全黑应选罗马杆两侧超出窗框15cm以上、底部拖地或过窗台20cm，或加装遮光盒/侧封条92% similarUnverified全遮光卧室的漏光主要来自帘布与墙壁的两侧缝隙和顶部，选罗马杆不如选带遮光盒或墙面凹槽的暗轨；帘布宽度应超出窗户两侧各15-20cm，并加装遮光帘头（帘楣）才能实现真正全黑91% similarUnverified全黑房方案：99%遮光布做主帘 + 顶部安装遮光帘盒或轨道贴天花板 + 两侧比窗户各宽出15-20cm并回墙 + 底部拖地或加遮光贴条，四周漏光是破坏遮光的主因，仅换高遮光布无法达到全黑90% similarUnverified全遮光效果不仅取决于布料，还取决于安装方式：罗马杆安装顶部会漏光，需搭配遮光盒或选择墙壁到墙壁的超宽帘；侧边漏光需布料两侧各超出窗框15-20cm。仅换全遮光布但暗轨/罗马杆漏光仍无法达到真正全黑90% similarUnverified真正的遮光关键在于窗帘四周的漏光而非布料本身：需帘布左右各超出窗框15-20cm、顶部用箱式帘头或吊顶暗轨，底部离地1-2cm，否则再高遮光率也漏光成框90% similar
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