Soft and hard woods are organic substances that are subject to chemical laws of decomposition especially when exposed to the air and sun light. Some protection is given by soaking or coating with chemicals, but then physical stress can damage the material. Doors made of wood are subject to the same problems, which is why many people are choosing fiberglass entry doors instead.
Fiberglass entry doors are made of a combination of glass and plastic polyester. The mixture starts off as plastic resin and strands of fiberglass. An application device applies both evenly over a mold. Air drying and time causes the mixture to set, becoming hard. The casting process works for both small doors like entry doors and large doors like garage doors.
The fiberglass process is also used for making such things like skis, car molds, and boats. There are no limits to what can be made as long as one has a mold and the fiberglass resin mixture.
The most familiar type of door, and one that is utilized in both old and new houses is the wood door. It imparts essentially the most classic look, and is adaptable in that its surface could be carved into intricate and complicated designs. It may also be fixed easily with normal wood shop tools.
But the looks of wood doors is compromised by the upkeep necessary to keep the surface looking good. Even after as short a period as one year, the surfaces of these doors could crack or peel due to moisture or heat exposure or to the sun. As to the prices, wooden doors are often pricey considering the length of time they last before requiring any upkeep work and more usually have more than a year's worth of warranty.
Despite being classified as less than conventional compared to a wood door, the steel door is in fact the most frequent kind of door used in many front entryways in houses. Its advantage lies in that it's very tough and inexpensive. Even though the steel door's metal surface could possibly get either too hot or too cold during extreme temperatures, it is easy to reinforce its core with foam or insulation so as to make it more energy efficient.
Nevertheless, steel doors are usually prone to rust and denting that is difficult to repair. As opposed to wood doors, steel doors don't exactly produce a warm invitation to visitors. Since homeowners often stay away from utilizing steel doors, these doors are more frequently seen in commercial buildings, instead.
Additional resources supplied for exterior doors fiberglass can be read here. The site talks about how to choose vinyl doors and windows.