Generally, a mix will get compacted by 20%–25%. Generally used thicker lifts are 2–4 in., and
thinner lifts are 1–2 in. Thicker lifts are easier to compact since they retain heat longer and also
help avoid the bridging tendency of thinner lifts. Thinner lifts, though, provide good results through
better smoothness and help avoid shoving, which could happen in thicker lifts.