Purity: Must Women Wash All Hair in Ghusl for Validity?

Practical Laws of Islam as per the teachings of Imam Khamenei

Purity: Must Women Wash All Hair in Ghusl for Validity?

English:

Question #192:

Is it obligatory for women to wash all the hair during ghusl? And if water does not reach all the hair in ghusl does it make the ghusl invalid, even if one knows that water has reached the entire scalp?

Answer #192:

It is an obligatory caution to wash the whole hair.

-Imam Khamenei, Practical Laws of Islam, Rules of Ghusl Janābah