Turkish company Gama Construction is expected to enter talks at the Labour Relations Commission today.
However, the company will protest against what it calls the "illegal picketing" of one of its Dublin sites by Sitpu workers.
Siptu denies the allegation of illegal picketing and is engaged in an official strike at Gama's Dublin sites with two other unions, Ucatt and Opatsi.
Up to 300 of Gama's Turkish workers began an unofficial strike six weeks ago, claiming they were paid between €2 and €3 an hour for an 80-hour week.
The Revenue Commissioners have received a labour inspectorate report into the company and are to examine the tax treatment of foreign workers in the case of Gama.
