Can smart locks truly improve home security without voiding insurance or creating new risks?

Smart locks promise convenience, better access control, and detailed activity logs. But readers still wonder about installation on metal doors, insurance implications, real-world downsides, safety versus keys, and whether these devices are truly burglar-proof. Below, we answer each question clearly and comprehensively, pulling in current standards and testing insights to give you practical guidance.

Can you put a smart lock on a metal door?

Yes—if you match the lock type to the door and hardware. Most retrofit smart locks (like August) mount on the inside of the door and require a standard single-cylinder deadbolt; if your metal door already uses one, installation is usually straightforward. Always verify deadbolt compatibility first, because many retrofits only support single-cylinder deadbolts, not mortise setups common on commercial steel doors. 

For fire-rated steel doors (typical in multi-unit buildings or commercial spaces), you may need a smart mortise lock that carries the proper UL/BHMA listings to keep the door’s rating intact. A qualified locksmith can confirm door thickness, backset, and whether your existing prep suits a mortise or deadbolt smart lock. 

Pro tips
• Check thickness specs—some locks have limits above ~2 inches.
• Expect wireless quirks with metal doors; dense steel can attenuate Bluetooth/Wi-Fi signals, so plan hubs/bridges accordingly.
• When in doubt, choose a listed Grade-1 or Grade-2 product and keep the fire label intact if applicable.

Do smart locks void insurance?

Generally, no. Insurers care that your entry hardware meets their minimum security requirements (for example, approved cylinders/grades) and that your doors/windows were properly secured at the time of loss. Many insurers even offer credits for approved security upgrades. The safe move is to confirm your policy terms and install a lock that meets recognized standards (ANSI/BHMA), keeping invoices and model numbers on file. 

What are the disadvantages of smart locks?

Smart locks add convenience, but they also introduce new failure modes you should plan for:

• Power and connectivity dependence: Dead batteries, phone failures, or Wi-Fi outages can strand you without your usual unlock method. Choose models with keypads, physical keys, or external 9V backup and set battery alerts. 
• Cyber risk and software bugs: Weak passwords, outdated firmware, or insecure networks increase exposure. Use strong, unique credentials, enable 2FA, and update firmware promptly. 
• Higher upfront and lifecycle costs: Hardware is pricier than a basic deadbolt and some ecosystems add subscription fees for remote features. 
• Mechanical realities still apply: If the door or strike isn’t reinforced, even a “smart” Grade-1 lock can underperform. Pair your lock with a reinforced strike plate and solid hinges. Standards testing focuses on both mechanical durability and forced-entry resistance—use those ratings to guide your choice. 

Are smart locks safer than keys?

They can be—if you pick a well-rated model and configure it well. Independent testing and standards matter here:

• Look for ANSI/BHMA grading (Grade 1 is the highest for residential deadbolts) and, where available, BHMA “AAA” (security, durability, finish) marks. These grades quantify resistance to picking, drilling, and brute force. 
• Lab tests from organizations like Consumer Reports compare both smart and traditional locks on kick-in, drilling, and pick resistance—some modern smart models perform very well. 
• Smart features can add safety: activity logs, one-time codes, auto-lock schedules, and remote rekeying equivalent (changing codes) reduce risks tied to lost or copied keys. Used correctly, those are security upsides you can’t get from a basic mechanical lock. 

Bottom line: A top-graded smart lock that’s installed on a reinforced door and set up with strong digital hygiene (unique passwords, 2FA, firmware updates) is at least as safe as a quality keyed lock—and often safer in day-to-day use. 

Are smart locks burglar proof?

No lock is burglar proof. Reputable lock makers and standards bodies are clear: grading improves resistance, not invincibility. Pair any lock with layered defenses—solid doors and frames, reinforced strikes, good lighting, cameras or doorbells, and sensible routines. 

Practical ways to harden the whole entry
• Choose Grade-1 where possible, or Grade-2 at minimum, and confirm proper door/strike reinforcement.
• Favor models that earn strong performance in independent tests, not just marketing claims. 
• Use PIN length limits, lockout after failed attempts, and alerts for tampering or forced entry. Many smart locks include these by default. 
• Keep software current and credentials strong; avoid sharing “master” codes.

Final advice: choosing and living with a smart lock

1. Match the lock to your door: Retrofit for standard single-cylinder deadbolts; mortise smart locks for many steel or fire-rated doors. Verify thickness/backset and listings. 

2. Buy by the numbers: Prefer ANSI/BHMA Grade-1 (or BHMA AAA) and consult independent tests to compare real break-in resistance. 

3. Configure for security: Unique passwords, 2FA, firmware updates, auto-lock schedules, and long PINs with lockout. 

4. Plan for failure gracefully: Keep a physical key (or keypad and backup power), share time-bound codes instead of keys, and monitor alerts.

5. Call your insurer: Confirm requirements and keep documentation to ensure your coverage remains intact or to qualify for any discounts. 

Smart locks aren’t magic shields—but with the right model, proper installation, and smart setup, they can raise your everyday security while making access simpler for everyone in your home.