Three women are refusing police requests to abandon a rooftop protest at the immigration minister's Brisbane office.

Scarlett Squire, Kelly Purnell and Ellen Sargent have climbed onto the roof of Peter Dutton's Strathpine electorate office to protest against the federal government's proposed life-time ban on refugees arriving by boat.

Protesters have climbed onto the awning of Immigration Minister Peter Dutton's office to denounce the government's new immigration policy.

They say they'll stay put until Mr Dutton responds to their concerns about plans to ban adults sent to immigration centres on Nauru and Manus Island from ever entering Australia, regardless of whether they're found to be refugees or not.

Ms Squire said police had arrested two supporters on the ground, one man and one woman. Police told AAP one person had been arrested but could not provide further details.