Vinyl is sometimes known by its chemical name polyvinyl chloride or the abbreviation PVC. It is a polymer compound meaning that a single chemical subunit forms the building block which is polymerized to form very long molecular chains. When it is polymerized, vinyl takes on a solid form. This solid form may be flexible if there are additives such as pthalates in the mix. The result is a durable, indestructible material.

PVC products are found in homes also in the form of vinyl doors and windows. They are attractive for two reasons. One, they are relatively cheap as a construction material. Two, they are quite durable as they do not suffer from warpage and cracking in the sun and rain.

There are a few problems associated with vinyl doors. They tend to be much uglier than fiberglass or wood doors. Also repair is near impossible except for very particular cases. In most circumstances it is better to replace the entire unit when it is damaged through trauma.

Vinyl lags a bit behind steel and wood as a material for doors.

Nevertheless the aesthetics of wooden doors is compromised by the upkeep needed to keep the surface attractive. Even after only one year, because of the door being exposed to the sun or moisture, the surface may begin to peel or crack. In terms of costs, wood doors normally are more expensive because they last longer before needing maintenance work to be done and they usually have more than one year warranty.

The steel door is categorized as being less classic when compared to a wooden door but is regarded as being probably the most commonly utilized kind of door in most houses. This type of door is very durable and very affordable. Even though the metal surface of a steel door could get hot or cold during extreme conditions, the core could be reinforced with insulating foam to boost the energy efficiency of a steel door.