Alarms, cameras and sensors are a sensible part of looking after a second home. They can report an opening, a power cut or movement at the gate. They cannot tighten a shutter, smell a drain, notice a slow leak under a sink or meet a plumber at the door.

The useful question is not “technology or visits”. It is which observations only happen when somebody is actually in the property.

What remote systems do well

A monitored alarm can notify an opening or a confirmed event according to how it is set up. Cameras at a gate or terrace can show whether an expected contractor arrived. Some sensors report temperature, humidity or water at a specific point.

Those tools shorten the time between an event and the owner knowing that something happened. They are only as useful as the response that follows. A notification with no local keyholder still leaves the house waiting.

Remote systems also need power, connectivity and someone who understands the settings. Switching the entire electrical supply off “for safety” can silence the very devices the owner is relying on. That decision belongs in the property profile, with advice from the relevant installer where the system is unclear. See electricity and water in an empty home.

What a camera cannot see

A camera covers a chosen field of view. It does not inspect the back of a kitchen cupboard, the seal at the base of a toilet, a wardrobe that smells of damp, or irrigation that has failed behind a hedge.

Photographs from a scheduled visit are different from a live stream. They are taken against an agreed checklist, in the same rooms, so that a new mark can be compared with the last visit. That is a record, not a guarantee that every concealed defect will be found.

Humidity, pooling water and a shutter out of true are typical examples. They often develop without triggering an alarm. The inspection checklist is built around those visual signs.

Alarms still need a local response

An alarm event is only useful if someone can attend, reset or investigate under the owner’s authority. Informal key circulation makes that slower. A coded key-holding process makes it possible without labelling keys with a complete address.

Guardemar does not monitor alarms as a security company. Where an owner already has an installer or a monitoring contract, a property-care contact can be one of the people authorised to attend. The alarm professional remains responsible for the system.

Use both, with a written split

A practical split looks like this:

  • The alarm and cameras report events the owner has chosen to monitor.
  • Scheduled visits inspect agreed rooms, water points, access, mail and exterior condition.
  • If either source raises a concern, the owner is informed and a qualified contractor can be arranged where authorised.

Neither layer replaces insurance, locks or maintenance. A camera does not make an unoccupied-property clause go away. A visit does not claim to detect every intrusion. For vacancy records, see unoccupied property clauses and documented inspections.

If you want a physical inspection routine alongside the systems you already have, review home watch in the Algarve or request a property assessment.