Most homeowners with security cameras believe their home is covered. They're usually wrong. After analyzing thousands of home security installations, the most common gap isn't a missing camera — it's a camera pointed the wrong direction, mounted at the wrong height, or watching a zone that doesn't matter. Here's the seven blind spots that cause the most damage.
Backyard Corners — The Dead Zone Nobody Checks
The back corners of a property are the most common camera blind spots on residential homes. One camera aimed at the center of the backyard can't see either corner — it just sees grass. A burglar approaching from the neighbor's yard through the fence gap will be completely invisible unless you have specific camera coverage on each corner.
Standard wide-angle backyard cameras leave the corners as dark zones. You're watching your lawn, not your perimeter.
Position a camera at each rear corner aimed along the fence line, not inward. This watches approach paths rather than empty yard.
The Sentinel: The Sentinel with CoverMap Technology shows you exactly which corner angles are covered and which aren't — before you've mounted a single camera. It flags each corner as a separate vulnerability zone and tells you where to place cameras for complete perimeter coverage.
Second-Story Entry Points — Roof Access Gets Ignored
Every experienced burglar knows the first rule of breaking in: use the roof. Second-floor windows, roof access points, and upper decks are rarely covered by cameras because most people mount cameras at eye level. A ladder changes everything — the second floor that seemed "safe" is suddenly accessible.
Ground-level cameras can't see up. Roof access points, upper windows, and elevated decks are completely blind spots for most home setups.
Mount at least one camera angled upward covering the roofline and any second-story access points. Use angle-of-rise calculations to cover ladder-reachable windows.
The Sentinel: The Sentinel maps your entire property including elevated features and identifies which upper access points create roof-access vulnerabilities. It generates coverage recommendations specifically for multi-story entry risks.
Driveway Gaps — The Space Between Front and Side Coverage
Most homeowners install a doorbell camera and a side-camera covering the driveway. But the middle of a long driveway is often missed — particularly if the side camera is aimed at the front yard or the house wall rather than down the driveway lane. A car pulling in, someone approaching on foot from the street through the driveway — missed entirely.
The driveway middle section (more than 30 feet from either end) is often unwatched. Vehicles and people using the driveway as an approach path go undetected.
A single camera at the midpoint aimed down the driveway lane catches all traffic. For long driveways, the rule is one camera per 40–50 feet of length.
The Sentinel: The Sentinel visualizes your driveway as a coverage line, marks the critical midpoint, and recommends camera placement that covers the entire approach — from street to garage.
Garage Entry — The Overlooked Access Point
Sixty percent of DIY security installers overlook the garage when planning camera placement. The garage door is the largest entry point on most homes, and the interior garage-to-home door is often unmonitored. If someone breaches the garage, they have everything — tools, vehicles, and inside access to your home.
Garage exterior and the interior garage entry door are unmonitored in most setups. This is the highest-value target for experienced burglars.
One camera covering the garage exterior approach + one camera inside the garage covering the garage entry door. The interior camera also catches vehicle theft.
The Sentinel: The Sentinel identifies your garage as a high-priority coverage zone and recommends exactly which cameras need interior coverage versus exterior — with placement guidance for each.
Side-Yard Gaps — When Trees and Fences Block Camera Lines
Side yards are long, narrow, and often obstructed. Trees, fences, and walls break camera sight lines. The camera that "covers the side" often only covers the first 15 feet before vegetation blocks the view entirely. Burglars know this — they use side yards precisely because homeowners don't watch them.
Vegetation, fences, and structures create dead zones along the property's sides. Wide-angle cameras sacrifice depth for width, making the problem worse.
Narrower field-of-view cameras (60–80°) positioned higher, pointed down the side path — with tree/trunk obstruction factored in. Consider a camera at both the front and rear of each side.
The Sentinel: The Sentinel maps your property's side access paths and accounts for obstructions (trees, fences, structures) when calculating coverage. It recommends narrow-FOV camera placement that maintains clear sight lines despite obstacles.
Entry-Point Coverage — Too Wide-Angle Means Too Little Detail
A camera set to 120° wide-angle at your front door catches the porch, the lawn, the street, and your neighbor's house. What it doesn't catch: the face of the person at your door or the package on the ground. Wide-angle makes everything visible and nothing clear. You have footage but no usable evidence.
Wide-angle entry cameras sacrifice facial detail for breadth. You capture the event but can't identify people, read license plates, or see package labels.
Pair a wide-angle camera for overall coverage with a narrow-angle camera (45–60°) aimed specifically at face-level and the delivery zone. Depth of field matters as much as angle.
The Sentinel: The Sentinel calculates face-level coverage for each entry point and recommends camera FOV specs that ensure usable facial detail at typical mounting heights — not just "visible" coverage.
Night-Time Coverage — IR Range Miscalculation
Most camera specs list IR (infrared) night vision range as a feature. But that 30-foot night vision rating assumes ideal conditions — clean lens, new IR LEDs, no obstructions. In real conditions with dirty lenses, fog, and slightly dusty camera housings, effective IR range drops by 40–60%. Cameras that "reach the back gate at night" don't actually, and you won't find out until something happens.
Night vision range degrades in real-world conditions faster than people expect. Coverage that looks fine in daylight is completely blind after dark.
Calculate real-world IR range as 50% of rated spec. If your gate is 40 feet from the camera and rated IR is 30 feet, you need a camera with 80-foot rated IR — or supplemental lighting.
The Sentinel: The Sentinel applies real-world IR range calculations to your specific property layout, accounting for distance from camera to each coverage zone, and flags any camera position where night coverage falls below the distance needed.