I have a Kayline replacement canvas, got it new. So this was a while back. Using with the sides rolled up during the day and then rolling the sides down at night. I guessing if the temp was in the mid fifties the windows would be stiff and hard to roll down. I would be afraid if it was colder the windows might crack. As far as installing over the bows it has to be a warm day and the let sit in the sun awhile before fastening the twists.