You may not always notice a badly designed door on a house (unless you're a design snob like moi
) but you will always notice a GREAT one.
When starting your search, you will want to keep a few things in mind. Above all else a door must be durable enough to withstand the natural elements (i.e.. wind, sun, rain etc.) Next, you will need to decide what material you would like. Below are some of your options.
Wood, the most popular type. Easily customizable and available in a variety of species, paint grades and construction type. A solid wood door is always a beautiful option, but it can be very expensive, not eco-conscious and will be more susceptible to the elements than one with wood veneer skins (don't go for anything less than 1/16" thick) and an engineered wood core. If the door is pre-finished, you want to ensure it has a durable stain and clear finish such as polyurethane. You will want to ensure all adhesives used on materials have no urea-formaldehyde and that all materials and finishes have no or low VOC's.
Steel doors will be your most affordable option when looking at base level models. It is stronger and more durable than wood or fiberglass and dings and dents are fairly easy to fix. Premium styles will receive a vinyl coating, similar to those you find on windows, which will help provide an additional weather barrier. If you're looking for something decorative, there are also embossed wood grain options. Looking for something even fancier? Go for a high end version with laminated wood veneer.
Fiberglass-Composite are great for humid climates. They are tough, mimic the look of wood, and most company warranties will back their models for the life of your home. Also, like steel doors, they are extremely affordable.
Aluminum doors as customized to suit your specific requirement and are only sold through dealers. They have a baked on enamel finish and so will never rust or need painting. These tough doors don't come cheap, they can be just as price as wood options.
Selecting the right door will lead to added energy savings, less maintenance and an inviting entry that will last for years to come.
One last thing, don't forget the importance of proper fitting weatherstrip seals and check that thresholds interlock with the bottom edge of the door.