The Electrical Trades Union (ETU) has launched a campaign which is calling for women's amenities to be mandatory on worksites across the country.

Women of Moyne representative Genevieve Grant said better amenities would be another step forward in what was already a positive movement of women taking up trades.

"It is nice to know there is a bit of extra thought being put into making the women who work on building sites more comfortable," Ms Grant said.

"It's not just for the girls, if they are comfortable in their environment then it makes it a lot more comfortable for the men on the site as well, everyone is happy.

"Women working on building sites and in other trades is becoming a lot more common now and it is getting to the stage where it isn't a novel thing anymore, which is very heartening to see."

The ETU commissioned a "Nowhere To Go" report to look into the available of amenities on site for its membership.

The report found women made up just two per cent of the electrical industry nationally.

The lack of on-site amenities was identified as an area that could be improved and help that percentage of women in the industry grow.

ETU national secretary Allen Hicks said ensuring workplace amenities and in particular, workplace toilets, are available and suitable should be a minimum requirement of every workplace.

He said unfortunately this was often not the case.

"For women in historically male-dominated occupations, the challenge is particularly stark, with women's amenities frequently treated as an inconvenience, improperly or irregularly serviced or not provided at all," Mr Hicks said.

"Research has shown that one way to increase participation (of women in trades) is to provide amenities and make sure women aren't left with nowhere to go."