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To maintain commercial doors and prolong their lifespan, regularly inspect and tighten hinges, lubricate locks and moving parts, and check weatherstripping for air leaks. For automatic doors, it is also important to clean the sensors to prevent costly repairs.

Inspecting your storm door regularly is important to catch any issues early and ensure its proper functionality. It's recommended to perform a thorough inspection at least once every season. This means you should check your storm door for any signs of wear, damage, or malfunction approximately four times per year—during spring, summer, fall, and winter.

Butt hinges are the most common of all door hinges. They’re frequently used in commercial and residential structures, secure interior and exterior doors, and can be used on cabinetry. They’re inexpensive, simple to install, easy to remove, and available in various materials and styles. They come with two leaves with a knuckle or barrel in the middle.

The vast majority of hinges are symmetrical, and either side of the hinge can go on the door or the frame. Occasionally, you'll find a hinge specifically made for right or left-handed doors with different attachment hardware or larger plates on one side. In most cases, the large side of the hinge goes on the frame.

It is possible to install hinges backward, so be careful when placing them. Position the hinge so that the hinge pin faces the direction the door will swing. For example, if you're standing on the side the door will open into, the pin should be visible. Be extra careful when installing exterior doors, as placing the hinges on the outside for an outward-facing door makes your home much easier to break into.