Source: This Old House | Repost Fadely 8/14/2020 –
Entry doors must be tough enough to withstand wind, rain, scorching sun, and would-be intruders, yet handsome enough to make a good first impression. Unfortunately, meeting those needs is a tall order for many front doors. Most older ones are made of wood or wood veneer, both of which warp, crack, and delaminate after years of exposure to the elements. Metal doors don’t last forever, either–the surface on some older steel doors can peel.
Whether that describes your front door or you just want to trade a solid door for one with glass panels that offer more light, you’ll find plenty of options available. There are new wood doors that resist the elements better than earlier versions, as well as metal and fiberglass ones that look like wood but provide greater security and often cost less.
Detecting Damage
Sometimes replacing a door means simply exchanging one door, called a slab or blank, for another. But in some cases you’ll have to rip out and replace the old door framing, which includes the door jambs and threshold — especially if these wood members have begun to rot.