Vinyl was developed by scientists in the 1920’s as a safe, durable, and versatile plastic material. Vinyl is mostly composed of two chemical elements; chlorine and ethylene. For years, vinyl has been the standard material used for replacement windows. Vinyl windows are chosen over wood because they offer the two important benefits of being resistant to both scratching and rotting. This means, vinyl windows require very little upkeep and do not need to be repainted. The biggest downfall of vinyl is that it is in fact plastic. This can often result in a less than impressive appearance. Therefore, even though vinyl may be more functional and resistant to the elements, you compromise on quality and beauty.