Rats and Mice love gappy doors! A half inch or twelve millimeters can allow a rat inside and a quarter inch or six millimeters in large enough for a mouse! Smaller gaps are often enlarged to these sizes by rodent gnawing.
The door in this photograph leads into a dark alley with several open dumpsters less than fifteen feet away. It is extremely vulnerable and needs immediate repair to prevent Rat and House Mouse invasion.
Experience will guide us modify the foundation, then use a combination of leveling cement, threshold and rodent-proof door sweep to keep this property safe and prevent future infestations.
For more information on how to rodent-proof your properties, call EHS Pest.