I'm gonna guess netting in the warm months, but honestly, they are far enough north to not worry as much as one would in a warmer climate. I was shocked by the

I'm gonna guess netting in the warm months, but honestly, they are far enough north to not worry as much as one would in a warmer climate. I was shocked by the lack of screens in windows in Norway, and I'm guessing Iceland is the same. The only time it has actually bothered me was on a farm when the cows were in the nearest pasture - there were so many flies!