Jack writes
We had a smoky brown cockroach problem in the soffit/fascia of our house. As far as I can tell, I've gotten rid of nearly all of them by baiting the primary harborage areas (i.e. where I see them at) with Advion. However, I wanted to spray the soffit and fascia to prevent reinfestation and kill any that are remaining. Question: Can spraying the exterior cause them to seek shelter in the attic? Should I go in the attic and "spray out" instead?
Typically it will not drive them inside because Demon is not necessarily a repellent, meaning the roaches try to avoid the area. Roaches will walk over where you spray and get the product on their bodies. Although they can make it inside before dying because Demon WP will take a little bit of time to kill the roach, they should be dead by the time they make it inside. It definitely would not hurt to spray the attic space for good measure.
Answer last updated on: 06/12/2011
