Hello there, I've recently had a 30ft X 20ft wooden workshop built on our land. it is lined internally with 3/4 inch osb board on all vertical walls and has an unduline roof lined with 1/2 osb board. The roof has 4 clear plastic corigated roof lights. I would like to install some kind of alarm. There are 3 opening windows on the walls which are well secured with 1 inch thick security bars bolted to the main frame. It has double opening doors which are secured with 2 Squire maximum level padbar and padlocks along with a full length double door bar. All hinges are bolted right through the frame. I have a master blaster which I'd like to fit inside but wandered if fitting pir sensors inside would cause false alarms . I would be going Texecom alarm on this but am not sure weather to just go mag contacts on every opening or to add a pir?