i can fully agree with all of the above.
its quite old hat to put contacts on all windows and doors.
perimeter protection:
all doors leading out of the property
volumetric protection;
pir and or dual tech sensors to all rooms on ground floor.
also we would fit PA buttons to master bedroom, front door and rear door
and pir sensors to first floor master bedroom and upper hallway,
keypad to first floor and to lower main entrance area
(by the final door, so as it easy to unset when you come in)
and have you a garage?
if so you could have a couple of circuits there as well,
a dualtech sensor a roller contact (heavy duty magnetic sensor)
and one on the doors leading in and out
then you get onto whether you want it remote monitored ?
red care, dualcom, digicom red care gsm, or just your usual speech dialler, audible only.
so thats the basic
but find yourself some local companies, at least three, and get them to quote. ensurew they are registered with either NSI or SSAIB
(no offence to those who are not)
so thats about it really
other than how about maintenance ???
i will halt here and let you digest it all, if you need any further please post
John