When addressing air leakage around an exterior door, the underside of the threshold is often overlooked. As homes shift with weather and age, gaps form beneath the door threshold. Hidden underfoot ...

When you approach door installation as a system—sill pan, flashing, shims, hardware, and sealants working together—you avoid the squeaks, drafts, and sticking ...

Slide the new threshold into place between the door jambs, and use a power screwdriver and screws (perhaps those saved from the previous threshold installation) to fasten it to the floor beneath.