Most business break-ins happen between 10 PM and 5 AM
Your business is most vulnerable when nobody’s there. The locks, keys, and access controls you choose determine whether a would-be intruder faces a 10-second entry or gives up and moves on.
Here’s what actually works for after-hours security in Delaware — based on what we see when businesses call us after a break-in, and what we install to prevent the next one.
The hierarchy of after-hours security (in order of importance)
1. Key control — know who has access
This is the #1 failure point we see. A business has 15 employees, 8 former employees, 3 cleaning crew members, and 2 maintenance contractors who all have (or had) keys. Nobody knows the full list.
What to do:
- Maintain a written log of every key issued
- Use restricted keyways (Schlage Everest, Medeco) that can’t be copied at hardware stores
- Rekey the day someone leaves — not next week
- Consider electronic access for doors with high turnover
2. Hardware grade — commercial locks on commercial doors
We see Delaware businesses with residential-grade hardware on their front doors. A Grade 3 Kwikset deadbolt on a storefront is like putting a screen door on a bank vault.
What commercial doors need:
- Grade 1 deadbolts or mortise locks on all exterior doors
- Reinforced strike plates with 3” screws into the frame studs
- Anti-drill plates on exposed cylinders
- Panic bars on exit doors (required by code for 50+ occupancy)
3. Access scheduling — limit when keys work
If your cleaning crew has all-hours access but only works 6-8 PM, that’s unnecessary exposure. Electronic access control lets you restrict WHEN credentials work, not just WHERE.
Practical examples:
- Cleaning crew codes only active 6-8 PM weekdays
- Delivery access only during business hours
- Management has all-hours access; staff has business-hours-only access
- Alarm auto-arms at a set time regardless of who’s still inside
4. Lighting and visibility — make your building a bad target
Burglars choose targets based on risk. A well-lit building with visible cameras is a harder target than a dark one.
What works:
- Motion-activated lights on all entry points (including back doors and loading docks)
- Interior lights on timers (makes it look occupied)
- No tall bushes or fences that create hiding spots near doors
- Visible camera housings (even if the camera is basic, the housing deters)
5. Alarm and monitoring — the last layer
Alarms don’t prevent entry — they alert you after entry. They’re important, but they’re the last layer, not the first.
What we see after business break-ins in Delaware
After 17 years of responding to break-in lock changes, here are the patterns:
The most common entry method: a key
Not a crowbar. Not a lock pick. A key. Someone who used to work there, used to clean there, or found/stole a key. This is why key control matters more than any other single measure.
The second most common: the back door
Front doors face the street with lighting and foot traffic. Back doors face alleys, parking lots, and dumpster areas with no witnesses. Many businesses invest in a good front door lock and leave the back door with a $20 knob lock. Burglars know this.
The third most common: glass
Storefronts with large glass panels can be entered by breaking the glass and reaching through to the lock. Security film on glass (3M or similar) makes this dramatically harder — the glass cracks but holds together, requiring sustained effort that creates noise and takes time.
Delaware-specific business security context
Wilmington storefronts (Market Street, Trolley Square)
Glass-front retail with aluminum frames. These need:
- Adams Rite deadlatches (designed for narrow aluminum frames)
- Security film on glass panels
- Bottom rails with flush bolts
- Good lighting on the sidewalk side
Route 13 / Route 40 commercial (warehouses, auto shops)
Steel roll-up doors and man-doors. These need:
- Heavy-duty padlocks on hasps (not the $8 Master Lock from Home Depot)
- Shrouded padlock hasps that prevent bolt cutter access
- Grade 1 deadbolts on man-doors
- Motion lighting covering the full perimeter
Office parks (Churchmans Crossing, Concord Pike, Newark)
Multi-suite buildings where individual businesses share common areas. These need:
- Individual suite locks that the building master doesn’t override (or shouldn’t)
- Restricted keyways so departing employees can’t copy keys
- Electronic access on server rooms and sensitive areas
- Clear documentation of who has access to what
Restaurants and bars (Delaware Avenue, Main Street Newark)
High staff turnover, cash on premises, late-night closing. These need:
- Keypad locks where codes change with staff (no physical keys to track)
- A safe bolted to the floor for overnight cash
- Manager-only access to the office and safe area
- Time-delayed locks on safes (prevents robbery under duress)
The after-hours security checklist
Before you leave for the night:
- All exterior doors locked and tested (push on them)
- Back door and loading dock secured
- Safe locked with day’s cash inside
- Alarm armed (if applicable)
- Interior lights on timer
- Exterior lights functioning
- No keys left in obvious spots (desk drawers, under mats)
- Windows closed and latched
When to upgrade vs. when to maintain
Upgrade when:
- An employee leaves and you realize you don’t know who else has keys
- You’ve been broken into (even unsuccessfully — they’ll try again)
- Your insurance requires better hardware for coverage
- You’re expanding and adding doors or employees
Maintain when:
- Locks work fine but haven’t been lubricated in years
- Strike plates are slightly loose
- Codes haven’t been changed in 6+ months
- You haven’t audited your key list recently
Commercial security service in Delaware and nearby PA
Kwikey Locksmith helps Delaware businesses with after-hours security: commercial lock upgrades, master key systems, restricted keyways, access control, and emergency lock changes after break-ins. We work around your business hours so you don’t lose operating time.
Call (302) 551-2550 to discuss your building’s security needs.