Jul 07, 2013 - 09:12 PM
The simple answer is both, old and new. German rockroaches are very mobile. They typically travel in boxes, furniture, etc. If you have a problem with german roaches now, in your present home, and you are moving to a new home, then it is almost certain that you will take them with you.
I would recommend to perform a treatment now at your present home using at the very least a gel bait such as Maxforce FC Cockroach bait gel.
Before you move into your new home, I recommend to do a complete indoor spraying with a long lasting product such as Demand CS. Treat all baseboards, cabinets, cracks, crevices, etc, with Demand CS. This way, when (if) the cockroaches crawl out of boxes, furniture, electronics, etc, they will hopefully contact the Demand CS and be killed.
Here is the link to our how to kill cockroaches page.