Should people lay a red cloth on the same floor when they die?

In the traditional culture of China, there are some customs and ceremonies after death, including the custom of wearing red cloth. Wearing red cloth means hanging red curtains or red cloth belts at home or in the cemetery during or after the funeral to show condolences and respect for the deceased.

In the case you mentioned, generally speaking, whether residents on the same floor need to wear red cloth depends on local cultural customs and family relations. In some areas and families, wearing red cloth is a traditional way of mourning, so residents on the same floor usually wear red cloth to express their condolences. In other areas and families, this custom may not be common, so residents on the same floor may not need to wear red cloth.

If the area where you live has the custom of wearing red cloth, you can take the initiative to ask other residents whether they need to wear red cloth to avoid unnecessary misunderstanding or conflict.