German cockroaches favor warm, humid spaces near food and water — kitchens, behind appliances, under sinks — and Allison Park's a humid continental climate with hot, humid summers, cold snowy winters, and frequent overcast skies keeps them active most of the year. American cockroaches, larger and reddish-brown, prefer basements, drains, and utility rooms. Brick and frame construction from the steel era dominates, much of it built directly into the region's steep terrain.
Treatment starts with locating the harborage points — the tight, warm, food-adjacent spaces roaches actually live in — and applying gel bait directly there rather than spraying open floor space. This targets the colony at its source and avoids the resistance issues that plague over-the-counter sprays. We follow up to verify the population has collapsed, not just scattered.