<p>Installing a wired system in an existing house can be difficult, depending upon the house. What are the contractors who want to install a wired system telling you will have to happen to install their system? Do they think all of the wires can be pulled or will they have to break into walls?</p>
<p>Our home had a wired system installed when the house was built. Later, when we wanted to expand the system, we expanded with wireless components so that we would not need to damage walls to do the work. The two can and do work together in many systems. </p>
<p>In addition to entry door sensors, I would recommend sensors on any first floor or basement windows, as well as any second story windows that are easily accessible from a roof, the roof of a car or van (i.e. over the driveway), or in hidden or poorly lighted places. Glass break detectors are great for sliding glass doors and other large glass areas, and motion detectors are nice to have near one or more main areas of the home where you would expect someone to enter. You may also want to consider having your smoke and carbon monoxide alarms wired into your system, and adding a heat detector near something like the garage or anyplace where paints, chemicals, etc. are stored (a work bench?), which will alert you when a fire begins, even before there is enough smoke to set off a smoke detector. </p>
<p>Things you can do to protect your home include installing motion sensor lights outside, putting some lights in your home on timers, keeping shrubs and bushes trimmed back from the house, and being friendly with your neighbors. </p>
<p>There are limitations to how effectively an alarm system will protect you. First and foremost, you must turn the system on (set to “away” when you leave and “stay” whenever you would like when you are home), remember to pay your monitoring bills and test your system regularly, as suggested. You would be surprised how many systems don’t work because they are not connected to electricity, turned on or monitored, and how many people are surprised when they don’t work as a result. Second, know that in many places, the monitoring company will actually call you first before alerting police/fire, etc. to go to your house. This is both to prevent you from getting charged for false alarms (as you will in many places) and to prevent the multitude of unnecessary calls to emergency services. Please don’t forget to file whatever paperwork is required with your local police and fire departments once you have a system. Finally, any system can be circumvented by a professional. Phone lines that communicate trouble calls can be cut and systems shut off by professionals. Generally, that doesn’t happen, though. Please note that if you get your phone service through your cable provider or through another electricity/service based provider, if that service goes out or if you have no power, you will also have no way for your alarm to communicate a trouble call. Most alarm systems themselves will have 24-hour backup batteries installed in case of power outages.</p>