What Are Pre-Hung Doors? Readymade Door Sets Explained for Indian Homes

What Is a Pre-Hung Door?

Pre-hung doors are doors assembled in the factory and installed directly in the space.

Key Components of a Pre-Hung Door

Key Components of a Pre-Hung Door include everything you see in any door, based on your requirements. For an overview, see the list below.

• ​Door Slab (Leaf): The swinging panel itself.
• Door Jamb (Frame): The three-sided vertical and horizontal enclosure that surrounds the slab and matches the total thickness of your wall.
• Hinges: Metal fasteners already mortised and attached to both the door slab and the side jamb for smooth operation.
• Stop Moulding: The thin raised strip fixed along the inside of the jamb that prevents the door from swinging through to the other side.
• Bore Hole and Strike Plate: Pre-drilled holes in the slab for the doorknob or lockset, alongside a mortised strike plate on the latch-side jamb.
• Threshold / Sill (Exterior only): The bottom horizontal piece on exterior doors that seals against drafts, moisture, and debris.
• Casing / Trim (Optional): Decorative moulding pieces that cover the gap between the wall and the door frame on the outside

How Pre-Hung Doors Are Installed

Step 1: Survey and Measurement

First, the space is surveyed to determine the functionality, and therefore detailed measurements are taken accordingly.

​Step 2: Manufacturing and Assembly

The survey team returns to the factory and hands over the measurements to the team, who then manufacture the frame and assemble all the parts mentioned above.

​Step 3: Installation

This includes plumbing and securing the hinge side, aligning and shimming the latch side, fastening the hinges and doorknobs, and adding finishing touches as needed.

​Pre-Hung vs Traditional Door Installation

Pre-Hung Door Benefits

• Faster, simpler installation: The door comes pre-hung, with hinges and other preparation largely taken care of, reducing on-site installation work.

• Better alignment and compatibility: Because the door and frame are designed and assembled, it's easier to achieve proper alignment and smooth opening and closing.

• Less site work: Minimal cutting, drilling, and hinge preparation is required on site, which can make installation cleaner and more efficient.

• Ideal for new construction: Pre-hung doors are particularly convenient when the opening is new and can be prepared to the required dimensions from the beginning.

Pre-Hung Door Limitations

• Bulkier to transport and handle: The complete door-and-frame assembly takes up more space and requires more care during transport and installation.

• Less flexible for customised openings: Unusual dimensions, shapes or existing openings may require additional modifications or a separately fabricated door and frame.

• Requires a properly prepared opening: Even though the door is pre-assembled, the wall opening still needs to be correctly sized, level and plumb for the door to function properly.

• Not always practical for replacements: If you're replacing only a damaged door or retaining an existing frame, installing a complete pre-hung unit may involve unnecessary changes.

How to Choose the Right Size and Frame

This is for those who would like to get into DIY (Do It Yourself) pre-hung doors.

​Measuring the Rough Opening

• Remove the interior trim (casing) to expose the raw framing studs.
• Measure the width at the top, middle, and bottom of the rough opening, and use the smallest or largest depending on manufacturer specifications (typically standard rough openings are sized 2 inches wider than the door slab).
• Measure the height from the top of the opening to the floor on both sides.
• Measure the jamb depth (wall thickness) from the inside edge of the drywall to the outside edge to ensure the frame matches your wall width

​Selecting the Frame and Swing

• Jamb width: Match your frame thickness to your total wall thickness, including drywall.
• Door swing: Determine if you need a left-handed or right-handed swing by standing on the side where the hinges are visible and seeing which way the door opens.
• Standard sizes: Common interior passage widths are 28, 30, and 32 inches, with a standard height of 80 inches.

​Final Tips for Indian Homeowners

• Think about where the door will be used: A bedroom door, bathroom door, main entrance and balcony door can have very different requirements. Consider privacy, security, ventilation, and weather exposure before choosing the same type for every opening.
• Check what comes with the door: A pre-hung door can come with different combinations of hinges, locks, handles, seals, and other hardware. Confirm exactly what is included rather than assuming everything shown in the product image comes with it.
• Consider pest and dust protection: For homes in areas prone to dust, insects or monsoon-related moisture, pay attention to the sealing around the door and the bottom gap. They make a noticeable difference in daily use.
• Think about furniture movement: If you're renovating or furnishing the home, consider whether the door width and swing will allow large furniture, appliances or mattresses to move through comfortably.
• Coordinate with other work: If you're installing multiple doors during a renovation, coordinate the door installation with painting, flooring, electrical and carpentry work. This can prevent finished surfaces or hardware from getting damaged during subsequent work.
• Check service and replacement support: Especially for branded or customised pre-hung doors, find out whether replacement hardware, seals and other components are readily available locally. A door may last for years, but individual components may eventually need attention.
• Don't choose purely by appearance: A door that looks good in a catalogue may not suit every room. Consider how it will be used every day, how much traffic it will see and what kind of exposure it will have.
• Keep future maintenance in mind: Ask how the door, frame, hardware and finishes should be cleaned and maintained before you buy. A little clarity upfront can prevent avoidable maintenance problems later.