How to Keep Someone with a Key from Getting In: Secure Your Space

When it comes to protecting your space from burglary, it’s important to think about security measures beyond just locking your doors. If someone with a key to your space wants to gain access without your permission, they can easily do so if you don’t have adequate protection in place. Fortunately, there are a number of effective strategies you can use to prevent unwanted entry into your space, regardless of whether the person has a key or not. In this article, we’ll explore some of the most effective ways to secure your space and keep out intruders.

Install a Deadbolt

One of the easiest and most effective ways to secure your space is to install a deadbolt on all exterior doors. A deadbolt is a type of locking mechanism that can only be opened by turning a key or rotating a knob from the inside, making it much more difficult for someone to gain access to your space using just a key. In addition, a deadbolt can also be reinforced with a metal strike plate to make it even more secure against forced entry.

Types of Deadbolts

There are two main types of deadbolts: single cylinder and double cylinder. Single cylinder deadbolts are the most common type and can be opened from the inside using a thumbturn, while double cylinder deadbolts require a key to unlock from both the inside and outside. While double cylinder deadbolts offer more security, they can also be dangerous in the event of an emergency, as it may be difficult to quickly exit the space without a key.

Install a Security Door

If you’re looking for even greater protection, consider installing a security door. A security door is a specially designed door that is made of heavy-duty materials and includes features such as reinforced frames, multiple locks, and impact-resistant glass. Security doors can be expensive, but they provide an additional layer of protection against forced entry and can greatly reduce the risk of burglary.

Types of Security Doors

There are many different types of security doors to choose from, including steel doors, aluminum doors, and iron doors. Steel doors are the most common type and are generally the most affordable option, while aluminum doors are more lightweight and corrosion-resistant. Iron doors are the most expensive option but provide the highest level of security.

Use a Door Barricade

If you want an additional layer of protection that can be easily added to any door, consider using a door barricade. A door barricade is a device that can be installed on the inside of a door to prevent it from being opened from the outside. Barricades can be made of metal or plastic and are typically placed in the floor bracket, using a pin or swinging bar to secure the door.

Types of Door Barricades

There are a variety of door barricades available on the market, including portable barricades, sliding bar barricades, and floor mount barricades. Portable barricades are easy to install and can be moved from one door to another, while sliding bar barricades are ideal for sliding doors and can be easily removed when not in use. Floor mount barricades provide the greatest level of security but require professional installation.

Install a Peephole or Door Viewer

Another simple way to protect your space is to install a peephole or door viewer. A peephole is a small hole in the door that allows you to see who is on the other side without opening the door, while a door viewer is a larger lens that provides a clearer view. By using a peephole or door viewer, you can avoid opening the door for strangers or unwanted visitors, which can reduce the risk of burglary and home invasion.

Types of Peepholes and Door Viewers

Peepholes and door viewers are available in a range of sizes and styles to fit different doors and aesthetic preferences. Some peepholes may also include additional features, such as a cover or privacy shutter to prevent others from looking in.

Install a Security Film

If you have glass windows or doors, consider installing a security film to help prevent break-ins. A security film is a thin, clear layer of film that is applied to glass surfaces to make them more resistant to impact and breakage. In the event of an attempted break-in, the film can help prevent the glass from shattering or breaking, which can deter intruders and prevent them from gaining entry to your space.

Types of Security Film

There are many different types of security film available, with varying levels of protection and visibility. Some films may also include additional features, such as UV protection, privacy tinting, or decorative designs.


By taking proactive measures to secure your space, you can greatly reduce the risk of burglary and home invasion. Whether you choose to install a deadbolt, security door, door barricade, peephole, or security film, it’s important to take action to protect your space and keep out intruders. With the right security measures in place, you can enjoy greater peace of mind and a safer, more secure living environment.


  • Q: Can a deadbolt be picked?

    A: While most deadbolts can be picked with the right tools and techniques, a high-quality deadbolt can greatly reduce the risk of forced entry and make it more difficult for intruders to gain access to your space.
  • Q: Are security doors worth it?

    A: Security doors can be expensive, but they provide a high level of protection against forced entry and can greatly reduce the risk of burglary. If you have valuable possessions or live in a high-crime area, a security door may be a worthwhile investment.
  • Q: Can a door barricade be used on any door?

    A: Door barricades can be used on most standard doors, but it’s important to choose a barricade that is designed for the type of door you have and provides a secure fit. Portable barricades are ideal for renters or those who frequently move, as they can be easily removed and installed on different doors.


  • Smith, L. (2019). The Best Home Security Systems. The New York Times.
  • Lee, D. (2019). A Guide to Installing a Deadbolt Lock. The Spruce.
  • Sherwood, B. (2019). 4 Types of Security Doors. DoItYourself.

Leave a Reply

Your email address will not be published. Required fields are marked *