Partition Between Men and Women in Mosques

ALLAH commands Muslims to refer to people of knowledge to get themselves well acquainted with the teachings of Islam as well as all aspects of life. It is perfectly Islamic to hold meetings of men and women inside the mosque, whether for prayers or for any other Islamic purpose, without separating them with a curtain, partition or wall.
If there is a concern that the lines of men and women will mix inside the mosques, then there is no harm in putting a lower barrier, only to demarcate the separate area for women. But women should not be put in a totally separate room in the mosques unless there is a shortage of space and no other proper arrangement can be done for them.
Both men and women are allowed to pray in the mosque in the Friday congregational prayer. When men and women are together in the mosque then we should have first men's lines behind the Imam, then children and then women. This is the way Muslims used to pray behind the Prophet (peace be upon him). He did not make or ask his Companions to have a curtain or wall between the lines of men and women. (See Al-Sindi's Commentary on Sunan An-Nasa'i, p. 798)
According to Shariah, it is not required to have a partition, neither of temporary nor of permanent nature, between men and women in the mosques.
It is perfectly Islamic to hold meetings of men and women inside the mosques, whether for prayers or for any other Islamic purpose, without separating them with a curtain, partition or wall.
It is, however, very important that Muslim women come to public gatherings wearing proper Islamic dress, for it is haram (forbidden) for a Muslim woman to attend a public gathering without a full Islamic dress. She must cover her hair and neck with a scarf, which should also go over her bosom. Her dress should be modest and loose enough in order not to reveal the shape of her body.
It stands to reason that partitions were introduced inside the mosques later in Islamic history. This was done, perhaps, because some women began coming to mosques without observing proper Islamic dress, or perhaps, some men wanted to discourage them from coming to mosques. During the time of the Prophet (peace be upon him) there was no curtain or partition in his mosque, although women used to come to the mosques almost for every prayer and for many other gatherings. It is, however, reported that they used to come to the mosques dressed up in long clothes. A'ishah, the Mother of the Believers (may Allah be pleased with her) said that the believing women used to attend the dawn prayer with the Prophet (peace be upon him). They used to come wrapped up in their long garments and then they used to return to their homes after the prayer, no one could recognize them because of the darkness. (Reported by Al-Bukhari)
Jumuah means a congregation of people who are praying behind one Imam in continuous lines without any barrier or interruption. As for people who pray behind the Imam, they should either see the Imam or see those who are in front of them. There is no Jumuah when a person is in one room and his/her Imam in another room, the lines are not continuous and the people behind the Imam are also not visible, otherwise people would not have to come to the mosque for Jumuah prayer. They would stay home and pray listening to the loudspeakers from their mosque or through intercoms. They could nowadays even pray Jumuah prayer in this way in their own homes listening to the prayer broadcasts coming from Makkah and Madinah on their radios, television sets or through the Internet. But no jurists have ever allowed a Jumuah prayer in this way.
The definition of Jumuah that is given above is a general one and is applicable to both men and women. Only in the case of necessity this rule can be relaxed. For example, if the mosque was too small and people had to pray on different levels or in different rooms to accommodate every person then this would be permissible because of necessity. Muslims should not deliberately and for no reason bifurcate their congregation in their mosques.
If there is a concern that the lines of men and women will mix inside the mosques, then there is no harm in putting a lower barrier, only to demarcate the separate area for women. But women should not be put in a totally separate room in the mosques unless there is a shortage of space and no other proper arrangement can be done for them.