Installing an interior door requires accurate measurement, proper hinge positioning, correct handle height, and careful adjustment. A door may look simple, but if it is not aligned correctly, it may rub the frame, swing open by itself, fail to latch, or create uneven gaps.
Before starting, check whether you are installing a prehung door or a door slab. A prehung door comes with a frame, while a slab door is only the door panel.
The door opening should be clean, level, and free from old nails or damaged trim. Check the rough opening, floor level, and wall condition before installation.
If the frame is already installed, measure the existing hinge positions and latch position. If the frame is new, make sure it is plumb and square before hanging the door.
Small errors at this stage can cause bigger problems later.
Measure the door height, width, and thickness. Interior doors commonly have different sizes depending on room type and building standard.
The door should have enough clearance to open and close smoothly, but the gaps should not look too large.
Before confirming door hardware, also check the backset, bore hole size, and latch position. These details affect lever handle and lock installation.
Mark the hinge positions on the door and frame. Cut hinge mortises if required. Fasten the hinges firmly, but do not overtighten the screws at first.
After the door is placed in the frame, check whether it swings smoothly. If the door rubs, adjust hinge screws or shim the frame if needed.
Good hinges are important because they support the weight of the door every day.
Our factory mainly supplies door hinges, lever handles, pull handles, door accessories, door knobs, and related architectural hardware. For interior door hardware bulk supply, buyers often need matching hinges and handles in the same finish to keep the project consistent.
After the door swings properly, install the latch, lever handle, or door knob. Insert the latch into the door edge, align the handle parts, and tighten the screws carefully.
Then close the door and check the strike plate position. The latch should enter the strike plate smoothly without forcing the handle.
If the latch does not align, adjust the strike plate or check whether the door is sitting square.
A properly installed interior door should have even gaps, smooth swing, secure hinge support, and easy latch operation.
Do not ignore small problems. A door that lightly rubs today may damage paint or flooring later. A latch that barely catches may fail after repeated use.
For apartment, hotel, office, and residential project supply, stable hardware dimensions help installers save time across many doors.
Interior doors need hardware planning before installation. The handle type, hinge size, lock function, door thickness, finish, and accessories should all match the door use.
For OEM/ODM door hardware orders, our team can discuss lever handle style, hinge size, surface finish, lock function, packaging, and project quantity before production.
This helps buyers prepare hardware sets for different rooms instead of ordering parts separately and finding mismatches later.
To install an interior door, prepare the opening, measure the door, install hinges, hang the door, fit the latch and handle, then adjust gaps and strike plate alignment.
The best result depends on both accurate installation and suitable door hardware.
Share your door size, hinge requirement, handle type, finish, lock function, packaging plan, and bulk order quantity. We can help match lever handles, door hinges, pull handles, knobs, and accessories for interior door projects.
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