How to install interior doors

The interior doors need to be replaced sooner or later. They can lose their appearance because they serve their owners for a very long time, or because of careless operation. In addition, replacing the interior prehung door may be necessary for an unexpected situation: because of flooding of the apartment, falling large furniture, etc.

Installing interior doors requires certain knowledge and skills. United Porte offers a wide range of stylish, modern interior models. This can be a classic or custom-made model to suit your taste. The professional understands how to install interior doors, but if you’re not a specialist, read this article.

How to remove the old door

The first step is to remove the old leaf and box. This should be done as professionally as possible, so as not to cause damage to the doorway. The process consists of three stages:

  • removing the old leaf from its hinges;
  • removing the casings;
  • dismantling the frame.

To remove the leaf from the hinges, you need to open and lift the leaf. The remaining elements: casings, door trim, and frame should be removed, depending on how they were fixed. If they were fastened with nails and screws, they must be removed. In the case of fixing with construction adhesive, you will need to use a tool. All this must be done before how to replace an interior door.

Necessary tools

When dismantling the old frame, you should use nailers, crowbars, chisels, drivers, and sets with them, as well as screwdrivers. They are also used when assembling the frame and fixing it in the opening. Beginner door installers use manual miter boxes. Experienced professionals work with the help of a miter saw.

When assembling a door frame for door installation, the most difficult thing is the accurate fixation of all its elements and the correct installation. The following things will help:

  • door trim kits;
  • cutters;
  • special spacers.

A powder-actuated tool is needed to seal and fix the frame. Fitting and fixing of the casing are carried out with the help of a nailer

Stages of installation of the interior door

There are a number of steps to be taken when installing a bedroom door or another interior door, namely:

  • prepare the doorway;
  • assemble the door elements;
  • install the fixing mechanism;
  • fix the frame in the doorway;
  • put the door leaf itself.

It takes time to install the door, but the result will please you for many years, which means it is worth carefully following all the steps.

Preparing the doorway

Choose the type of door leaf. If it is a hinged type door (sliding), you need to carefully plaster the walls near the door opening on the side of the hinged leaf. To expand the opening, you need a punch with a spatula nozzle. To reduce it, the walls are built up by pouring cement, bricks, or concrete blocks.

Assembling the door elements

For the hinged type door, the marking is made along the leaf. The marked bar is sawn off. First of all, we prepare the upper part of the frame, then we measure the vertical elements. After all the blanks are cut out, the frame is assembled. The parts are fastened to each other with self-tapping screws. The measurements for the additional elements are taken.

Installing the door mechanism

How to install prehung doors interior? Such a door is fixed by means of a special rail and roller elements. For this purpose, the hinged system is attached first. To install the sliding door, the roller mechanisms are mounted on the upper end of the door leaf. Then, a test movement of the leaf along the rail and closing of the guide rail and roller mechanisms with a decorative bar is made. The installation of the hinged door involves fixing two hinge mechanisms. For this purpose, self-tapping screws or wood screws are used.

Fastening of the frame, installation of the leaf and casings

The frame is fixed by means of dowels or staples with fixing frame with screws or self-tapping screws. The gaps between the frame and the wall are filled with assembly foam. Hanging the leaf is performed from the position of the open door. The leaf is lifted over the pin in the frame and pushed on it. The final step is the installation of the casing, which is fastened on the construction glue or finishing nails. You can also use self-tapping screws, but they are usually masked by decorative plugs similar to the tone of the casing. Now you know how to install bedroom doors or other interior rooms.

Required materials

When installing bedroom doors or any other interior of the house, you will need the product themselves, that is, a leaf made of MDF or natural wood, as well as the fittings. All products from the company United Porte are of high quality and original design. The products on our website are available to order and can be delivered to the address you specify. The door will complement any house project.


You should contact a trusted supplier to choose a quality prehung door and other types of models. United Porte has been on the market for over 25 years. The advantages of our products: are perfect quality, style, eco-friendliness, and wide assortment. Prompt delivery and installation are also available for our customers.

Collections represented on our website will complement the design of any house’s ideal space, whether it is an office, home, apartment, hotel, or restaurant. Models can be standard or made to order. It all depends on the wishes of the client. Contact us for advice and order!

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