Mice and Exclusion Old Toronto

Mice and Exclusion Old Toronto

The initial call to the property was for a severe mouse infestation that turned out to be rats. Rats and mice are similar in that they are both rodents. However, rats are far more dangerous both to your home and to human health. They are capable of damaging your house in ways mice never could. The main difference between house mice and rats is that rats live outside and only enter the house looking for food. While mice live in the house permanently.

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Exterior Inspection 

The initial inspection of the home revealed an entryway under the deck for plumbing. Plumbing vents are easy to access for rats and must be sealed off to prevent entry. A wall vent was also found to be accessible as well and would be sealed with rubber-coated galvanized steel mesh. The plumbing vent would need a one-way rat door to allow rats inside the house to vacate.

Plumbing vent
This hole in the bricks was not sealed in any way around the pipe, it is open access to rats.
Wall Vent
Wall vents are made of plastic and are easy for rodents, especially squirrels, to breakthrough.
Under the deck
This is where most of the entry ways were found and seal. a rat one-way door was installed at the plumbing vent opening.

Interior inspection 

The interior inspection of the house found a huge amount of damage. There were holes eaten through the drywall by rats. Chew marks were everywhere and the dishwasher’s hose had been chewed clean through. A mouse treatment was done by a previous company but the rats had chewed straight through the tamper-proof bait station and eaten the bait inside. Due to it being bait for mice the rats would likely not have died from it. There was also a lot of feces found on the inside of the house.

Bait station
A previous companies mouse bait stations, chewed straight through by rats.
Rat feces in large amounts on the floor of the house.
Dish washer cord
The rats chewed through the dish washers water intake cord, destroying it.

Initial Measures

The initial measures taken by the technician included placing large weighted tamper-proof bait stations on the outside of the house near areas of high activity, in this case, the back deck. These bait stations contain a type of commercial grade rodenticide called single-use. The rats, unlike mice, do not nest food in the way mice do and will simply eat it. The bait itself resembles birdseed which is rats favourite food. The mouse bait stations were all removed and the interior treatment for rats was completed.

Proposed exclusion

The proposed exclusion by the technician was to seal off a series of openings as well as install a one-way rat door on the plumbing vent beneath the deck. A wall vent was sealed off and the rat one-way door allowed the rats to leave the house while preventing them from getting back in.

Plumbing vent
the plumbing vent was sealed after the one-way door was removed.
Wall vent
The wall vent was sealed with a black rubber-coated galvanized steel mesh cage.

plumbing vent sealed



In conclusion, the rat infestation was dealt with promptly. The one-way door was successful in getting the rats out of the house so they could be treated on the outside more easily with the commercial-grade rodenticide. The rat infestation ceased and the customers were very happy to have their home and yard back.