We just had our carpet installed which looks great, layer spent 10hrs however I'm not sure if the stairs are done correctly. The edges along the riser are not stapled down completely, each riser shows a small opening. I wasn't there when the layer finished the job so couldn't ask him but spoke to the boss on the phone and he said it's all done like that so if we were to change the carpet in the future, it would be easier to pull out. He also said it would look awlful if completely stapled down which I don't quite understand. If this is the correctly installed, I'm concern about insects getting into the opening.
I'm not able to attach an image so I hope the description is clear.
Your responses are greatly appreciated.