The front door or back door in a house is designed to keep out the outside. It usually opens up into a street. A patio door is designed as transition between an indoor and an outdoor space. It usually opens up into a garden or backyard. It is also bigger than an ordinary door.

This type of plastic has various uses in the building industry such as siding, weatherboarding, fascia, window frames, sills, and doors. There are also upvc front doors, upvc back doors, upvc French doors, upvc stable doors. Instead of cast iron, this material is also used as gutter and down pipes, waste pipes, and drainpipes.

It is a type of rigid plastic. It is an abbreviation of Unplasticized Polyvinyl Chloride. In other countries it is known as vinyl. Due to its unique properties, it can be made to simulate the appearance of wood and other material. It is weatherproof, waterproof, durable, and low maintenance.

It is a specially designed door for patios that is made out of the material upvc.