Unley's housing is exactly the stock that catches out off-the-shelf alarms. Sandstone villa walls and the double-brick of later decades attenuate wireless signal badly enough that an all-wireless kit reliable in a display home turns intermittent here — and an alarm you can't trust is an alarm you stop arming. The roof cavities above those walls are a century old and have residents, and a detector placed without the possums in mind will wake the street at 3am until someone gives up on it. Our Unley alarm work starts from the construction: signal tested room by room before anything is designed, a wired backbone where the masonry demands it, detectors positioned and sealed against cavity noise, and cabling routed through roof spaces so original plasterwork and overlay-protected fabric are never touched on the way through.
We don't guess whether wireless will work through Unley masonry — we measure it, in the actual rooms of the actual house, before committing to a design. Sandstone and double-brick attenuate signal unevenly: one villa's rear bedroom is fine, the next one's drops packets all summer. The design that comes back is usually hybrid — wired runs through the roof space where the walls demand it, wireless only where testing proved it — so every zone reports reliably from every corner of the house, not most of them.
The ceiling spaces above Unley's villas have carried possums and rodents for generations, and roof-cavity wildlife is behind a large share of the false alarms that make owners quietly stop arming their systems. We place detectors away from ceiling noise paths, use sealed housings that dust and insects can't compromise, and choose sensor types that watch the rooms people move through rather than reacting to every thump overhead. In a suburb where the alarm protects genuinely valuable contents, placement discipline is what keeps it armed every night.
Unley's pattern is entry from the concealed sides — the tree-shaded setback, the side gate, the rear — while the frontage is only the reconnaissance view. The alarm design follows that: reliable perimeter detection on side and rear doors and the windows the garden screens, interior zones layered behind them, and monitoring so a 2am activation in an empty house produces a response rather than a log entry. Sirens are positioned to actually carry to neighbours across deep blocks, because a siren nobody hears is decoration.
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