> How to armor a wooden door

How to armor a wooden door

We are constantly looking for new methods to protect our homes, businesses or offices. We install security locks, alarms, sensors of all kinds and then we notice how none of that matters, if our door is weak and does not provide any security.

Many times, we have in our homes doors made of plywood or made with low-quality materials; so it is necessary that we shield them so that they are really resistant to potential attacks. The first thing we think of when we hear “armor” is to place a steel sheet on one or both sides of the wooden door; to later cover them with a lacquer or veneer board. There is a relatively right part of that thinking, but armor is so much more than that.

In this article we will tell you everything you need to know to shield a wooden door, so that it is really safe for your property. Read on and find out how to do it.

What is the “Shield” of a wooden door?

Shielding consists of a series of techniques, by means of which a common object is taken and transformed to make it resistant to possible external attacks. Generally, wooden main doors are armored because it is a much more affordable option than install a new armored door.

Armoring a wooden door basically consists of eliminating the weaknesses or vulnerable points that it may have. Therefore, one or two steel sheets are attached to the inside of the door, so that it is reinforced against potential attacks. The frame can also be protected with multiple anti-lever anchors, in such a way that we can protect the line of the hinges. Other measures we can take are to install a new security lock that guarantees anti-bumping, anti-picking, anti-breakage, anti-extraction and anti-drilling protection; being able to have several closing points such as the Mul-T-Lock. As well as a reinforced protective shield and an attack detection system

The most important thing when armored a door

The main objective of the shielding is to increase and reinforce the security of the door, frame, lock and closing device. Most of the wooden doors are weak, due to the material with which they are constructed. It is really easy to deform a door by exerting leverage, due to its flimsy nature. Although we must point out that this does not happen with quality solid wood doors such as cedar, mahogany or walnut.

In the case of the lock, it must meet the following objectives:

  • It must include a good protection shield.
  • It should make the extraction of the cylinder really complex.
  • The latches should anchor firmly in the door frame.
  • It must be reinforced against door and frame leverage.
  • It must be recessed and these must reinforce the edge of the door.
  • The cylinder must be of high-end and maximum security.

Previous Considerations

Because we are going to tune a wooden door, we must consider a series of points to make it as similar as possible possible to an armored door. These are:

  • The steel plate to be installed glued to the faces of the door must be 1.5mm thick and must have the same dimensions as the door.
  • Once the steel plates are installed, they must be covered with sheets of wood to paint or with finishes in pine, walnut or cherry; all for aesthetic purposes.
  • The frame must be reinforced with expansion bolts, so that it can be further joined to the pre-frame and the benefits to which it is attached.
  • Existing hinges must be replaced by continuous bolt lines along the entire length of the door. The bolts must have the perfect width for the door in question and 8 anti-lever pivots must also be installed. In this way an opening attempt will be extremely difficult.
  • When installing the lock, we will fix it both to the shield, to the door and to the decorative panel.
  • The lock must have a minimum of 3 anchor points and a maximum of 6. Among the best on the market we have the Fortissime, Primlock and Vertipoint locks.

How to armor a wooden door

Next, we will proceed to tell you how you can armor your door without resorting to professional services. Consider taking the proper time in each work, so that you obtain an optimal result.


  • Two 1.5mm thick steel sheets, with anti-prying function.
  • A protective shield, the Lynx are one of the best valued.
  • Safety lock.
  • Surface lock with template.
  • Decorative wood planks.

STEP 1: Replacing the old lock

The first action to reinforce our door is to replace the old cylinder or cylinder with a security one and install an external protective shield. With the shield we will protect the cylinder of the lock, of the attempts of struggle.

To proceed, we will remove the interior handle by loosening the shield locking screws. We will take the opportunity to change the cylinder before installing the new shield. To do this, we will remove the screws located on the edge of the door. Once changed, we will place the protection of the cylinder marking the location of the detention screws and we will make small lateral cuts to extract the chips.

STEP 2: Placing the plates

We will mark the exact location of the plate that is located just above the door frame; Then, to make the box and insert it, we will carry out the same action as with the lock: mark and empty the chips with an awl.

Once finished, we will place the plate by drilling the holes through which the dowels will enter the frame.

STEP 3: Second lock

When buying the lock, it is essential that you make sure that you bring a mounting template. Now, we will proceed to mark the exact location of the retainer, which is normally known as “the first piece”, this is where the slip enters.

Using a chisel, we will cut the door mat also known as the jamb and we will empty the recess where the frame closure is located. Before proceeding to pull-anchor the ratchet, we will check in which direction the slip turns.

STEP 4: Beautify

Once all the steps are finished, we will proceed to embellish our door with the outer part of the cylinder and the strike that goes on the frame. After finishing, we will place the moldings and the decorative wood plates, so that our door does not keep a trace that it has been armored.

You must bear in mind that this is a homemade armor and that no matter how hard we try, its protection level will not exceed 3. In the same way, it should be noted that given the impossibility of acquiring an armored door of a higher level, the armor home of a wooden door is an extremely successful option; since it is a way to reinforce security with the available resources. Finally, this is a fabulous option to fortify old doors, with very delicate finishes or that are protected by the patrimony of the State.

DIY How To Harden Doors Pt.1- EZ Armor Door Armor

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