What hours to techs work?

I have been working in the wind industry as a tech, for about 2 and a half years now mostly working in Ireland and Scotland, and I was just wondering how many hours do y’all work?. Because the company I’m with, when I’m out on site working major ops, e.g taking rotor down/drivetrain exchange we work on average 70-80hrs a week including weekends. Is this normal?.