Up here in Canada, I've universlly seen them grind up the very top layer of the old asphalt before laying down the next layer. I presume that's to improve adhe

Up here in Canada, I've universlly seen them grind up the very top layer of the old asphalt before laying down the next layer. I presume that's to improve adhesion. Can't say I've seen many places where obvious delamination of the layers happens. Are they not taking that step in florida?