What Is an Exclusion Pest Control Service?
When you call a pest control company, one of the things that they could recommend is a process called exclusion pest control. This is for when an initial inspection doesn’t reveal where their entry-point is, and trapping and baiting won’t solve the problem. This process does not a guarantee that you will eliminate the problem, but it is highly effective. An exclusion process is one of the most effective ways to prevent rodents from entering a building.
An exclusion, done properly, involves these two parts:
1. Expose and inspect potential rodent entries in foundations, frames, pipes and ducts.
2. Find entries and Plug them. Remove varmints and their nests, and create barriers around the building.
An exclusion usually starts with digging a trench around the base of the building. This helps to unearth any access holes that rodents have dug through the foundation. This will expose holes in the concrete or pipes that have become breaches in the perimeter. Once the examination is complete and all possible entries have been exposed, you can add the exclusion materials. The trench is usually around one foot deep. Into this, and along the whole length of the building, run a metal 1/4″ mesh called construction fabric. The bottom of it will be in the trench against the building. The top will be attached above the concrete to the building with roofing nails or staples. This can be done under the siding or a piece of trim can be put over it to improve the way it looks.
The finishing process on the trench is to fill it with rock. Some people opt to use pea-gravel because when a rodent digs in it, the pebbles fall back in upon themselves. Others will use river rock, presuming the heavier rocks are much harder for a rodent to move. Either way, if done properly, the animals get frustrated and ultimately abandon their efforts at entry.
Pipes and vents can create a problem because they are often hard to access. Bathroom and kitchen fans can come out of a wall instead of on the roof. All these, including plumbing vents, need to be covered with the mesh as well. Roof vents and bird block can be a problem, so they must be inspected and covered.
Each building will have its own unique set of circumstances that may require some adaptability. In general, however, the process is the same with all companies. When standard methods of baiting and trapping don’t work, you may have to consider an exclusion.