When should you follow up? Some pest control services are one time things but many of them require follow up services and inspections, possibly additional treatments. The general rule of thumb is one to three weeks later for an active problem, and next month for a follow-up inspection on a minor issue. If trapping is being done for mice, we should be back within a week. For traditional bed bug treatments, it is two weeks, for medium level or worse cockroach issues it is three weeks, for pharaoh ants it is two weeks. Every pest is different and every infestation is different. In every case, we will make specific recommendations on when that particular unit should receive additional services.
The other thing to remember is the worst pest problems will require the greatest amount of work from the tenants to clean and prepare, and the greatest number of follow-up treatments to eliminate the problem. If the cleaning and preparations are never sufficient, the problem may never be totally eliminated regardless of the number of followup services!
Many people who allow a pest problem to get out of hand without reporting it will do this again. If they allowed their cockroaches or bed bugs or mice to get so bad that they moved into surrounding units, there is a very good chance they will repeat the same behaviors. So long as there are people in your building that have had a high level problem in the past, they should be re-inspected regularly to ensure that there is not another pest problem brewing. Once the current problem is solved they may need a visit monthly or quarterly or perhaps only once per year, the key is to not forget about them!