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Are French Doors Secure?

There are many reasons a homeowner might choose to install a set of French doors. They boast a classic, traditional appearance, let heaps of light into the house, and are designed to be as easy to operate as they are on the eyes.

One area in which some feel they are lacking, however, is in security. Many believe that the more open nature of French doors means that they are more inviting to thieves than conventional external doors.

This is simply not true - particularly with modern French doors.

That said, the security of your French doors will depend on the build quality of the doors themselves, the quality of the glazing, and the locking mechanisms that keep you in, and intruders out. The right French doors can be just as, if not more sefrecure than patio doors or sliding glass doors - you just need to know what to look for!

French Door Security: What to Look For

It goes without saying that a poorly built and/or poorly installed set of French doors will be easy to break into, so the first (and arguably most important) thing you should be looking for is a good professional joiner or handyman.

Of course, if you’re an experienced DIYer it's perfectly possibly to carry out the installation yourself; just make sure you know what you're doing and that, once the installation is complete, the doors are tight in their frame with no obvious space between the threshold and the doors themselves. You’ll also want to ensure the doors can be opened and closed with ease.

Another thing to consider are the security devices your French doors are supplied with. These will vary between both brand and product ranges. All our French doors are supplied with a secure multi-point locking system as standard.

Which material is best for French doors?

French doors are generally constructed from either wood or uPVC. Wood is typically deemed to be more desirable and durable, but it is also more expensive. Thin, poor quality wood, however, will be just as fallible as uPVC (and it’ll probably cost you more, too). As such, we would recommend going with engineered or hardwood French doors whenever possible.

French doors and glazing

The vast majority of homeowners choose French doors as the bridge between their garden or patio, and their home. This maximises how much light those large glass panels can let into the home.

That said, these same glass panels can also put many prospective shoppers off, with many assuming they are the weakest part of the door. There really isn’t anything to be concerned about, however, so long as the doors are double glazed, and use toughened glass.

Locks and latches - what to look for on your French doors

Mortice Lock – traditionally, the most common lock you’d find on a set of French doors is the 5 lever mortice lock.

This operates in a similar manner to the locks found on most front doors, so is just as secure; however, the rear of the house is less exposed so break-ins from the rear are far more common. This means that your rear doors should always be supplemented by a more secure locking system.

Multi-point Lock – similar to the systems you'll find in most bi-folding doors (and many modern front doors), a multi-point locking system works like a mortice lock, but it locks the door (as the name suggests) at multiple points, all operating at the same time with the turn of the key.

This is what you should be looking for when buying French doors.

French Doors: Extra Security

If you feel your home needs extra protection, there are a number of ways you can make your French doors even more secure. For the very best French door security:

  • Choose laminated glass. Laminated glass is manufactured in the same way as any other double glazing, except a sheet of plastic is positioned either between the glass or on the outer pane, adding extra protection.
  • Consider installing window bars or security bars, which you simply prop over the handle at night or when you’re out. Many of these also come with built in alarms, which will activate if someone tries to open the doors.
  • Security screens offer a great last line of defence against potential intruders. Whilst they are not generally considered to be the most attractive option, they can be easily pulled back when not in use. They are also very easy to install and cost-effective.
  • One step above security screens, security grilles for French doors are sturdier and just as easy to install, though they are harder to obscure.
  • If you don’t have one already, invest in an alarm system; either specifically for your French doors or for the entire house.
  • A sensor alarm can be installed to prevent a forced entry before it begins. These can be mounted on the doors themselves or on the walls outside your home, and will detect anyone approaching the home before they have a chance to attempt a break in.
  • In a similar vein, wedge alarms can be set under your doors to act as a pressurised trigger whenever the doors are moved. Remember to set the sensitivity though!


Of course, the best thing you can do to keep your French doors secure is to actually remember to lock them before you leave the house or go to bed at night. Before any burglar resorts to more extreme measures they will always check to see if the door has been left open first, so don't make it easy for them!

Also remember to check your French doors occasionally for signs of wear and tear. They are external doors, after all, so they will be exposed to the elements over time. This is particularly important for wooden doors. While timber typically lasts many years longer than uPVC, this won’t be the case if the doors aren’t properly cared for.

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