Wood doors are made of glued wood, they can then resist various deformations. And in order to protect such a door from moisture, it must be covered with varnish or film made of polymer. PVC structures can be divided into two and three -chamber, this makes it possible to be warmer and soundproof. Steel doors are covered with special varnish or skin. They are very resistant to damage and hacking. Aluminum doors are very durable and today popular. The only drawback was only that over time dents appear on them.
