The threshold is a separation between areas. A typical threshold separates the exterior from the interior of your house at a door. If the threshold is broken down, it may allow water and air to penetrate your home and can cause damage to your laminate floors. When this is the case, the do-it-yourselfer can remove the old threshold and replace it with a new one that will seal out the elements from your home.
Purchase the new threshold before you remove the old one. You do not want to leave your home exposed to the elements. Use a tape measure to gauge the proper size.
Remove the old threshold. Most exterior thresholds are aluminium with a rubber gasket. Many times the gasket can be replaced. If this is not the case, adjust a circular saw depth of cut to 3/8-inch deep. This will allow you to cut the threshold without damaging the floor. Cut the threshold into two pieces.
Cut any caulking that is between the threshold and the door jamb and casing. This will make it easier to remove the threshold. Use a sharp utility knife and a putty knife.
Pry out the old threshold from the centre where you cut the threshold in two. Use a pry bar and a scrap piece of wood for this. Many times the threshold will have an adhesive holding it in position.
Clean off the subfloor where the new threshold will be installed. Scrape off any glue or silicon adhesive with a heavy-duty putty knife. Measure the opening for the new threshold. This is the width you will need to cut the new threshold to fit. Use a tape measure to measure the door opening where the threshold will be installed.
Cut the new threshold to length using a metal hacksaw or a jigsaw with a metal blade. Dry fit the threshold into the opening to check the fit.
Remove the threshold and apply a silicon adhesive to the subfloor. Use a caulk gun for this. Put the new threshold in place, making sure the back of the threshold is pushed back against the laminate flooring so no gaps are visible.
Use a screw gun to screw the threshold in place with the supplied anchors.
Caulk with a caulk gun a good silicon between the door and the threshold.
Wear knee pads to protect your knees while working on the floor.
Wear safety glasses when operating power tools.