Tips for Installing Internal Doors

While many DIY enthusiasts around the country can install a new internal door quite easily, many of us need some assistance to make sure the fitting goes as smoothly and effectively as possible.

We understand that buying new doors is an investment in your house and interior, thus maintaining them is critical. You don’t want to install a door that rattles or swings open on its own, so always read the installation instructions that came with your doors first.

This post will provide you with important information about hanging interior doors. They apply to a variety of door alternatives, such as replacing an old door with a new door, or replacing an old door with a new door, and so on.

If you are having trouble with the installation procedure, we strongly advise you to use an expert.

Door Dimensions

Before you can install a new internal door, you must first acquire accurate dimensions of your existing door. Our easy guide to measuring doors includes essential suggestions and expertise on how to do this correctly, so you don’t skip any key stages that might come back to haunt you when your new door comes and you discover it’s truly too big or much too little. So, be ready and grab your tape measure.

Different doors allow for varying degrees of trimming; for more information, please see the ‘Tech Specs’ on the product page online or contact one of our door specialists.

If you can’t find the precise size door you need, try how much you can reduce to see if you get a satisfactory fit.

More information may be found in our measurement guide.


Trimming your door to size is considerably simpler than many people believe. If you want to trim the door yourself, you’ll need a few equipment, including a pencil, tape measure, a wood plane, a hand saw, and tiny wooden wedges. The hand plane conducts the majority of the work since it just shaves off equal quantities from either side while assuming that the prior measurement was correct.

A 2mm space on each side and at the top of the door is required for a properly fitting door.

The bottom gap is determined by the thickness of your flooring.

To get an even finish, use a wood plane.

For a smooth finish, sand the door.

Finishes for Doors.

Your doors may be finished and treated in a number of ways. We appreciate that everyone has their own unique style and interests, but here are a few suggestions for door finishes. Before applying any coatings, make sure your door is completely dry. It is recommended to sand away any remaining filler or paint before adding finishes to existing doors.

There are several alternatives available for your doors:




Lacquer / Varnish



Hinges Attached to the Frame

Before you begin fitting hinges to the frame, make sure that the new hinges fit the old ones in the frame.

If they don’t, you’ll need to carefully mark the location of the new ones and then chisel away the excess wood.

After marking all of the hinge placements, screw each hinge with a center screw.

Installing a genuine wood veneer, molded, or MDF door requires two hinges, while primed doors need three hinges.

Door Hinges Installation

Now that you’ve determined the dimensions for the hinges to the frame, it’s time to attach the hinges to the door itself.

Most doors employ the typical butt hinge – there is no set location for these, but they should be installed on the top and bottom for stability (and middle)

Mark the location of the door hinge by opening it at right angles and putting it on the door’s side.

Use a chisel to carve away the areas where your marks will be. Do not try to chisel the hinge recess all at once. You should cut within the line you have drawn.

For further information, see this Interior Doors Installation Guide.

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