This video demonstrates the proper technique for undercutting the door casing or the molding around the door. You will need to do this when you are laying a laminate floor, otherwise the laminate flooring will not seat underneath the door casing correctly. The first step is to figure out how much you will need to cut out of the door casing. This can be accomplished by measuring the thickness of the laminate flooring plus any underlay you may be using. The presenter demonstrates this with a power saw and decides 1/16" is the correct width. He then places the saw against the door casing and cuts the 1/16" away from the bottom. Now the laminate flooring will slide under the door casing and sit correctly against the law.