Cockroaches spend most of their time out of sight. In Brisbane homes, that often means inside wall cavities, behind kitchen splashbacks, under bath hobs and in the roof space above the ceiling. Gel bait and surface sprays cannot always reach these spots, so the crew we book uses a fine insect dust puffed in with a hand duster.
The dust settles in a thin layer inside the void. Cockroaches walk through it, pick it up on their legs and bodies, and carry it back to where they rest. It stays active in dry voids for a long time, which makes it useful in older homes and units with many hollow walls and gaps around pipes.
- Gaps where plumbing enters the wall under sinks and vanities
- Power point and switch plate cavities in the kitchen
- Behind the oven, dishwasher and built-in cupboards
- Under bath hobs and shower bases where gaps allow
- Roof spaces and subfloors on houses
Dusting is almost always part of a wider cockroach treatment, used with gel bait inside and a spray around the outside. The crew applies only small amounts, placed into voids rather than on benches or floors. They will tell you which areas were dusted and whether anything needs to stay closed up for a while. Because the dust sits inside the walls, you will not see it once the job is done, and normal cleaning does not disturb it.
If you keep seeing cockroaches come out from behind a splashback or power point, the source is probably inside the wall. Call 07 3543 7765 to book wall void dusting in Brisbane as part of a treatment with an upfront price.
