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Door hinges are a critical part of your door hardware selection. Selecting the appropriate door hinges for your project will ensure a seamless fit and decades of reliable performance.  There are a few factors to consider when choosing between different types of hinges which we will lay out below.  This guide will focus primarily on residential door hardware and what will be found in the majority of homes across the US.  As always we are here to help.  This article will serve as a helpful guide to make a purchase decision, but if you are still in need of help please reach out to us.  Your call or email will be answered by a knowledgeable associate who will get you on the right track! 704-489-2990 or support@ebuilderdirect.com Door Hinge Anatomy   Door hinges are composed of 3 main parts.  The Hinge Leaf, Knuckle, and Hinge Pin.  The hinge leafs are the two sides that mount to the door and door jamb respectively, they are joined via the knuckle and are held together with a hinge pin that runs the length of the knuckles.   Residential Door Hinge Types   Butt hinges are the most common hinge type for residential applications, they are cost effective and fit a broad range of applications.  They are installed on doors which have been mortised on both the frame and the door.  Mortised just simply means that a groove has been cut for the hinge to rest flush within the mounting surface.  Butt hinges consist of two rectangular halves that are joined in the middle via interlocking knuckle as shown above in the hinge anatomy example Plain Bearing- Standard as shown above no additional components to reduce friction.  Hinge simply opens and closes by pivoting around the hinge pin Houseguard Hardware 3.5