“We all know that the holy Zohar advise all married ladies – not just chassidim – to not let a single hair be seen even to the walls of their house.”
And the halachah is not according to the zohar. A married woman is not required to have any headcovering in her own house.
“The accepted way to achieve this is to shave off all the hair. “
Only in some communities, particularly those with Hungarian roots.