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Generally, hinged French patio doors are considered more secure than sliding glass doors. French doors typically feature a more robust, solid frame that can support multi-point locking systems and deadbolts, securing the door at several points and making them harder to break into. In contrast, sliding doors often rely on a single lock and operate on tracks, which can be a security vulnerability. While you can add security bars and other features to enhance a sliding door's security, a well-made French door is often more secure on its own. Ultimately, the overall security of any patio door depends on the quality of its materials, the locking hardware, and proper installation.

Many doors can be cut to size, but it depends on the door material. Solid wood doors are relatively easy to trim to a specific size, while hollow core and metal doors are trickier and can usually only be shaved down a little before you risk damaging them. If your door needs a lot of adjustment, it's best to order a custom size or have a pro do the resizing to make sure it holds up over time.

When choosing a door for the space between your garage and house, steel is your best bet for fire safety. While wood—and sometimes glass—doors are common, they have lower fire-ratings. Fire-rated steel doors can withstand flames for up to three hours—double what wood can manage (90 minutes). Glass, while non-combustible, can crack under extreme heat. Steel may cost more, but it also offers the best protection. Steel isn’t the most aesthetically pleasing choice, but as long as your door meets the International Residential Code (IRC) standards, it’ll do its job in protecting your family and home.

Security experts recommend deadbolt locks as the most secure option for a house's exterior or entry doors. Deadbolts provide the best security because they can prevent most types of forced entry and are harder to lockpick. Common types include the standard single-cylinder deadbolt, which is often found on front doors. For enhanced security, you can opt for a double-cylinder deadbolt, which requires a key to operate from both the inside and the outside.