New Hampshire Cluster Fly Control
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Cluster Flies are a very common pest throughout North America. They are a medium sized fly (1\4 to 3\8 inch long) which are usually dark gray in color with golden hairs located on the thorax.
If you think you have a Cluster Fly problem - don't delay - Contact the Cluster Fly Control Experts in New Hampshire - JP Pest Services for a FREE On site inspection
What does a Cluster Fly look like?
Cluster Fly ¼ to 3/8th of an inch
During most of the year, cluster flies are not a problem in structures. In August and September however, as evening temperatures begin to drop they seek protected places in great numbers to over-winter. In many cases, this is within walls, attics and storage rooms of houses.

The picture above shows Cluster Flies “clustered” around attic gable vent
They are attracted to warm walls (usually South and West facing) where the sun shines the longest. They then squeeze through amazingly small cracks and crevices to access the warmer interior of the structure. They can even get around the weather stripping of expensive windows Screens offer little protection since these flies prefer to crawl in through small openings elsewhere around the building or force their way around the edges of where the screen fits the window. For this reason they are extremely difficult to keep out of houses. Isolated houses in the country are especially prone to invasion, since they offer the only warm shelter for miles around.
If they have not invaded the living space directly they eventually make their way down from false ceilings, attics and wall voids into living and working spaces. They can number anywhere from a few dozen to many thousands of flies creating a very uncomfortable living or working environment.
How to Control Cluster Fly Infestation...
Control is best achieved by preventing the flies from entering the structure in the first place. This is accomplished by treating all areas at risk to cluster fly infiltration in the early fall. This treatment must be timed in anticipation of the flies seeking over-wintering sites. With specialized equipment, an application of a residual insecticide, targeted to critical areas will kill the vast majority of the flies as they attempt to infiltrate the structure.
Cluster Fly Control Testimonials...
"Thanks for the great Ant Control service. We seem to have more than our fair share over here in Hanover! Cluster Fly Control is next." Ant Control, Cluster Fly Control, Bat Removal
Janet, Hanover NH