These fastening bolts secure double doors with rods that engage at the top and bottom.

Cremone bolts are a type of decorative hardware used as a locking device. They are ideal for fastening double doors or a pair of casement windows. Cremone bolts are mounted to the surface of doors, windows, built-ins, and bookshelves and utilize vertical rods to securely close and lock double doors using a lever handle. First appearing in 18th century France cremone bolts are thought to have originated in the Cremone region of Italy (pronounced krə̇ˈmōn).

So, if you're looking to add some elegant flair to your double doors while also improving their security, a cremone bolt might be the perfect solution. Not only are they aesthetically pleasing, but they also provide an additional layer of protection against forced entry. We'll review the installation process of a cremone bolt and cover why it's a great option for DIYers.

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What Is a Cremone Bolt?

It's a type of locking mechanism typically used on double doors, which consists of a vertical rod that slides up and down into a strike plate. The rod is operated by a set of handles located at the top and bottom of the door. This design provides more stability and security than a standard latch bolt since it runs along the full length of the door or cabinet face.

Why Should You Use a Cremone Bolt?

Apart from the added security, the aesthetic value of a cremone bolt is undeniable. They add a touch of elegance and sophistication to any double door. Additionally, they are quite easy to install, and most DIYers should be able to easily handle the process.

How to Install a Cremone Bolt

So, let's discuss the installation process. First, you'll need to measure the distance between the top and bottom of your doors to determine the length of the rod. It's important to note that cremone bolts come in various lengths, so you'll want to choose the one that matches the height of your doors.

Once you've determined the length of the rod, it's time to drill the holes for the handles and the strike plate. Make sure to use a drill bit that matches the diameter of the handle and strike plate. You'll also need to chisel out a shallow mortise for the strike plate to sit flush with the door frame.

After drilling the necessary holes, insert the rod into the handles and slide it up into the strike plate. Test the mechanism to ensure that it's working correctly. If it's not, you may need to adjust the rod's length or make sure the strike plate is correctly seated and aligned. Voila, c’est tout (that’s all)!

Cremone bolts are an excellent option for DIYers looking to improve the security of their double doors while also adding an element of sophistication. They're relatively easy to install and come in various lengths to match the height of your doors. So, if you're considering adding some extra protection to your double doors, a cremone bolt is worth considering.