Sensor Placement Guide for Homes

Homeowner Summary

Where you place sensors matters as much as which sensors you install. A water leak sensor sitting on a shelf instead of on the floor next to your water heater will never detect a leak. A motion sensor pointed at a heating vent will trigger false alerts all day. A temperature sensor mounted on an exterior wall will read 3 to 5 degrees different from the actual room temperature.

This guide provides room-by-room recommendations for optimal sensor placement throughout your home. Your Shipshape service professional uses this guide (along with the Shipshape Installer Protocol) to determine exactly where each sensor goes during your installation visit. Understanding the reasoning behind placement helps you avoid accidentally moving or obstructing sensors during cleaning, renovations, or furniture rearrangement.

The typical Shipshape-monitored home uses 8 to 15 sensors for comprehensive coverage. Smaller homes and condos may need as few as 6. Larger homes and estates may use 20 or more. The right number depends on your home's size, layout, number of water fixtures, and which systems you want monitored.

Room-by-Room Placement

Kitchen

Sensor	Placement	Purpose
Water leak sensor	On the floor under the sink, toward the back near supply lines	Detect supply line leaks, drain connection failures
Water leak sensor	On the floor next to or in front of dishwasher	Detect dishwasher supply line or drain hose leaks
Door/window sensor (optional)	On exterior door frame if kitchen has exterior access	Monitor access point
TriSensor or MultiSensor (optional)	On a wall or shelf away from the stove and oven	Monitor ambient temperature (avoid placing near cooking heat)

Kitchen tips: Avoid placing temperature sensors near the stove, oven, or dishwasher exhaust — they produce heat that skews readings. Water leak sensors should be placed on hard flooring, not on rubber mats that could prevent water from reaching the probes.

Bathrooms

Sensor	Placement	Purpose
Water leak sensor	On the floor under each sink vanity	Detect supply line and drain leaks
Water leak sensor	On the floor at the base of each toilet, near the supply line	Detect wax ring failure, supply line leak
Water leak sensor (master bath)	On the floor near the bathtub/shower if accessible	Detect overflow or supply line leak

Bathroom tips: Bathrooms are high-humidity environments. Motion and temperature sensors are optional here — the primary concern is water damage. Place water sensors on tile or vinyl flooring, not on bath mats. Ensure sensors are not in the direct splash zone from the shower.

Utility Room / Laundry

Sensor	Placement	Purpose
Water leak sensor	On the floor behind the washing machine, near supply hose connections	Detect supply hose burst (one of the most common catastrophic leaks)
Water leak sensor	On the floor next to the water heater, on the drain pan overflow side	Detect tank failure or pressure relief valve discharge
TriSensor or MultiSensor	On the wall near the water heater (not on the heater itself)	Monitor ambient temperature, detect HVAC or heater anomalies
Energy Meter	Inside the electrical panel on this floor (if accessible)	Whole-home energy monitoring

Utility room tips: This is the most sensor-dense room in most homes because it contains the most high-risk water and electrical equipment. Place the water heater sensor where water would flow first if the tank developed a leak — usually the side with the drain pan overflow or the lowest point of the floor.

Living Areas (Living Room, Family Room, Den)

Sensor	Placement	Purpose
TriSensor or MultiSensor	Wall-mounted at approximately 7 ft height, facing the main room area	Motion detection, temperature, light level
Door/window sensor	On each exterior door frame (front door, back door, sliding door)	Monitor access points
Door/window sensor (optional)	On windows that are regularly opened	Monitor ventilation behavior

Living area tips: Mount motion sensors so they have a clear line of sight across the room, not pointed at a wall. Avoid placement directly above heating vents or in direct sunlight, which causes temperature reading errors. For rooms with cathedral or vaulted ceilings, mount at 7 to 8 feet rather than higher — PIR sensors lose accuracy at greater distances from the detection area.

Bedrooms

Sensor	Placement	Purpose
TriSensor or MultiSensor	On the wall near the bedroom door, at 7 ft height	Temperature monitoring, occupancy detection
Door/window sensor (optional)	On bedroom windows, especially ground-floor	Security monitoring

Bedroom tips: Not every bedroom needs a sensor. Prioritize the master bedroom and any bedrooms on floors where the HVAC performance needs monitoring. If budget allows, a TriSensor in each bedroom enables room-by-room temperature comparison, which is extremely valuable for diagnosing ductwork problems.

Basement

Sensor	Placement	Purpose
Water leak sensor	On the floor near the sump pump	Detect sump pump failure or groundwater intrusion
Water leak sensor	On the floor at the lowest point of the basement	Detect any water accumulation
MultiSensor	On the wall in the main basement area	Temperature, humidity (critical for mold detection), motion
Door/window sensor	On basement window wells or exterior access doors	Security monitoring

Basement tips: Basements are critical monitoring areas because water damage and humidity problems often develop slowly and go unnoticed. The MultiSensor (with humidity sensing) is preferred over the TriSensor in basements because humidity monitoring is essential for mold prevention. Place the MultiSensor on an interior wall, not against the foundation wall, for accurate ambient readings.

Attic

Sensor	Placement	Purpose
TriSensor or MultiSensor	Mounted on a rafter or joist, away from insulation	Temperature monitoring for HVAC and roof assessment
Water leak sensor (optional)	Under HVAC air handler if located in attic	Detect condensate overflow

Attic tips: Attic temperatures can reach extreme highs (140+ F in summer) and lows (below freezing in winter). Verify the chosen sensor's operating temperature range. The TriSensor 8 and MultiSensor 7 are rated to 50 C (122 F), so in extremely hot attics, the sensor should be placed in a shaded area near the eave rather than at the ridge peak. If an HVAC air handler is in the attic, a water leak sensor under the condensate pan is critical — attic leaks cause extensive ceiling and insulation damage.

Garage

Sensor	Placement	Purpose
Door/window sensor (Pro model)	On the garage door, with tilt detection	Detect garage door open/close status
TriSensor (optional)	On the wall near the interior house access door	Temperature monitoring, motion detection
Water leak sensor (optional)	On the floor near the water heater (if in garage)	Detect water heater leaks

Garage tips: The Pro model of the Door/Window Sensor is recommended for garage doors because it uses tilt detection, which works with the overhead door mechanism. Standard magnetic sensors require too large a gap tolerance adjustment for most garage doors. If the garage is detached, a range extender in the main house may be needed.

Signal Considerations

Placement for Optimal Z-Wave Signal

1. Central hub placement — The hub should be located as centrally as possible relative to the sensors. A hallway closet on the main floor is often ideal.
2. Avoid metal barriers — Do not place sensors behind large metal objects (refrigerators, filing cabinets, metal shelving). Metal reflects and absorbs Z-Wave signals.
3. Height matters — Sensors mounted higher (6 to 8 feet) generally get better signal propagation than sensors at floor level, because they are above most furniture and obstructions. Exception: water leak sensors must be at floor level.
4. Distance between hops — Ensure that no sensor is more than 80 feet (25 meters) from the nearest mains-powered Z-Wave device. If it is, add a range extender.
5. Avoid interference sources — Keep sensors at least 3 feet from WiFi routers, microwave ovens, and baby monitors. While Z-Wave operates on a different frequency, strong 2.4 GHz transmitters can cause incidental interference.

Construction Material Impact

Material	Signal Attenuation	Notes
Drywall on wood studs	Low	Standard residential, excellent signal
Plaster on wood lath	Low-moderate	Slightly more attenuation than drywall
Plaster on metal lath	High	Common in pre-1960s homes, significant signal loss
Brick (single layer)	Moderate	Common in exterior walls
Concrete block	Moderate-high	Common in basements and commercial
Poured concrete with rebar	High	May require extender per room
Metal siding or roofing	Moderate	Acts as partial Faraday cage
Glass (windows)	Low	Good signal path

Mounting Methods

Method	Best For	Pros	Cons
Adhesive strips (3M Command)	Renters, temporary placement, lightweight sensors	No holes, easy removal	Can fail in humidity, limited weight capacity
Screw mount	Permanent installations, heavy or security-critical sensors	Most secure, reliable	Requires drilling, leaves holes
Magnetic mount	Sensors with magnetic base (TriSensor 8)	Easy battery access, quick repositioning	Limited to included magnetic base plate
Shelf/surface placement	Test placements, non-critical locations	No mounting needed	Can be knocked over, moved accidentally
Recessed mount	Custom installations, new construction	Invisible, clean aesthetics	Requires cutting into wall/ceiling, permanent

Coverage Planning: How Many Sensors

Minimum Coverage (6-8 sensors)

For homes on a budget or those starting with core monitoring:

• 1 hub
• 3-4 water leak sensors (water heater, washing machine, main bathroom, kitchen sink)
• 1 energy meter
• 1-2 door/window sensors (front door, garage door)
• 1 TriSensor (main living area for temperature baseline)

Standard Coverage (10-15 sensors)

The Shipshape-recommended configuration for most homes:

• 1 hub
• 4-6 water leak sensors (all major water fixtures)
• 1 energy meter
• 3-4 door/window sensors (all exterior doors)
• 2-3 TriSensors or MultiSensors (living area, master bedroom, basement)
• 0-1 range extenders (if needed for home size)
• 1 siren (for critical audible alerts)

Comprehensive Coverage (15-25 sensors)

For larger homes or homeowners who want maximum protection:

• 1 hub
• 6-8 water leak sensors (every fixture with supply lines)
• 1 energy meter
• 5-8 door/window sensors (all exterior doors and windows)
• 4-6 TriSensors or MultiSensors (every major room)
• 1-2 range extenders
• 1 siren + 1 doorbell

Shipshape Installer Protocol

The following protocol is used by Shipshape-certified service professionals during sensor installation visits. It ensures consistent, optimal placement across all Shipshape-monitored homes.

Pre-Installation

1. Walk the home — Before unpacking sensors, walk every room with the homeowner. Identify all water fixtures, HVAC equipment, electrical panel location, and exterior access points.
2. Map the layout — Sketch or photograph the floor plan. Mark the intended location for each sensor. Note construction materials (especially basement walls, interior wall types, and any concrete or metal barriers).
3. Plan the hub location — Choose a central, permanently powered location with Ethernet access. Plug in and power on the hub first.
4. Test signal — Before mounting sensors permanently, pair each sensor while holding it at the intended location. Verify it connects to the hub. If signal is weak, plan a range extender.

Installation Order

1. Hub (pair and verify cloud connection)
2. Range extenders (pair and verify, run initial network repair)
3. Water leak sensors (highest priority — these prevent the most expensive damage)
4. Energy meter (requires electrical panel access, may need to be scheduled separately if an electrician is needed)
5. Door/window sensors (exterior doors first, then windows)
6. Environmental sensors (TriSensors, MultiSensors)
7. Siren/doorbell (last, as these are notification devices)

Post-Installation

1. Run Z-Wave network repair — After all devices are installed and positioned, run a full network repair.
2. Verify all sensors — Open and close every monitored door. Place a damp cloth on every water sensor. Walk past every motion sensor. Confirm events appear in the SmartThings app.
3. Document placement — Take a photo of each sensor in its installed location. Record the location in the Shipshape installation notes for the home.
4. Configure SAM alerts — Verify that SAM is receiving data from all sensors. Set up alert routing (homeowner push notifications, dealer dashboard alerts) and configure any custom thresholds.
5. Educate the homeowner — Show the homeowner where each sensor is located, what it monitors, and what they should do if they receive an alert. Emphasize: do not move or unplug any sensors.

Common Installation Mistakes to Avoid

• Pairing sensors at the hub and then moving them to distant locations without running a network repair (devices retain the direct route and may not function at distance)
• Placing water leak sensors on carpet or bath mats (water must contact the metal probes)
• Mounting motion sensors facing windows (PIR sensors can false-trigger from sunlight and outdoor heat sources)
• Installing the energy meter CT clamps on a sub-panel feed instead of the main incoming conductors
• Forgetting to secure sensor mounting with screws in high-traffic areas (adhesive fails from door vibration)
• Placing the hub inside a metal cabinet or behind a TV (metal blocks Z-Wave signals)
• Not testing each sensor after mounting (a sensor that pairs at 3 feet from the hub may not communicate from 60 feet away)

Shipshape Integration

Sensor placement directly determines the quality and completeness of SAM's monitoring. Every article in the hardware category describes individual device integration, but placement ties it all together.

SAM Monitoring:

• SAM builds a virtual model of the home based on sensor locations. Each sensor's data is interpreted in context of where it is placed. A temperature reading from a basement sensor is evaluated differently than one from an attic sensor.
• Placement metadata (recorded during installation) enables SAM to generate location-specific alerts: "Water detected under kitchen sink" rather than "Water detected by Sensor 7."
• SAM tracks sensor coverage as a percentage of critical areas monitored. Homes with gaps in coverage receive recommendations for additional sensors.

Home Health Score:

• Comprehensive sensor coverage is the foundation of a high Home Health Score. A home with sensors covering all water fixtures, the electrical panel, all exterior doors, and key environmental zones scores significantly higher than one with partial coverage.
• The Score weights water monitoring highest, followed by environmental monitoring, then access monitoring, then energy monitoring. This reflects the relative financial risk of each category.

Alert Routing:

• Alerts include location context based on sensor placement metadata. This enables homeowners to act faster ("check under your kitchen sink") and enables dealers to dispatch with the right tools and parts.
• Multi-sensor correlations (e.g., a water sensor alert plus a humidity spike from a nearby MultiSensor) increase alert confidence and severity.

Dealer Dashboard:

• Dealers see a sensor coverage map for each managed home, making it easy to identify gaps during service visits.
• Installation documentation (photos, placement notes) is accessible from the dealer dashboard for reference during return visits.
• Coverage percentage is tracked fleet-wide, enabling dealers to upsell additional sensors to homes with incomplete monitoring.
• SAM generates personalized sensor upgrade recommendations for each home based on its specific layout and current coverage.