Select the Appropriate Size of Backer Rod

always spilled the joint up as much as possible and if you feel the joint entirely then it's not going to crack and it's not going to fail I see there's all kinds of different background different sizes of background there's all the way down to quarter Edge so would I always try to use background or is there times when I just don't need to use that garage so I'll typically tell folks that I start thinking about using background when the joint's about a half