Sab hauv ntawm lub qhov rooj hluav taws steel yog ntim nrog cov khoom siv hluav taws xob zoo ib puag ncig thiab hluav taws kub rwb thaiv tsev. Nyob rau hauv kev sib xyaw ntawm lub qhov rooj thiab lub qhov rooj ncej nrog rau ib ncig ntawm lub iav hluav taws, kev kho hluav taws kub sealing yog ua tiav, uas ua kom muaj zog ntawm qhov hluav taws kub. Hlau qhov rooj hluav taws tuaj yeem teeb tsa raws li qhov xav tau ntawm Windows, louver Windows, qhov cua louver, thiab lwm yam.

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