Exterior Metal Door

Since the 1940s, technology has significantly improved the manufacturing process of commercial hollow metal doors. The manufacturing process involves nine steps before a metal door is shipped to a job site for installation. First, the process begins with the raw materials. The standard material for a commercial metal door is galvanized steel.

Galvanized steel is a steel surface that has received a galvanized coating, which has been annealed. Galvannealed steel starts with a galvanized coating, where the steel is dipped in zinc to protect it from rust. After coating, the steel is heated (annealed) to allow the zinc to bond with the surface. The result is a corrosion-resistant matte finish that holds paint well.

Steel shaping for commercial doors involves several key steps:

• Large steel sheets are cut down to the required door size.

• The sheets are bent and formed into the outer shell of the door.

• Reinforcement channels are shaped and

Different commercial door locations call for various materials and features. For example, interior commercial doors do not require the same level of durability and security as external doors. Your back exits should provide security for your building and an easy way for occupants to leave the premises. Let’s look at a few examples of the best door options for back exits.

There are many different door varieties to choose from, from wood to metal to glass. While glass doors or doors with glass inserts are an attractive option for the design of your business, glass is generally not a suitable material for backdoor exits. 

Back exits are often not visible and can be a tempting place for thieves and unauthorized visitors to break in. In fact, nearly a quarter of break-ins in 2025 happened through the back door. Glass, by its nature, is more vulnerable than other types of doors. For these back exits, it is best to choose a material such as metal, wood, or another solid material.