Rats often enter homes and business s through vents located on the roof.
Roof vents and rats.
One common style of vent that is located on the roof is commonly called a j vent.
Your best bet might be to extend the duct a few feet above the roofline to make the vent inaccessible to rats.
Use a heavy grade of steel wool copper mesh or metal scouring pads to fill cracks and holes in exterior walls.
I actually don t think this can be done legally.
These entry points need to be sealed in order to prevent rats from entering the structure through roof vents.
If you have overhanging trees textured walls or anything that would let a rat climb on your roof then you should have aluminum screens installed on all your soil vents.
Chris cudmore oct 24 13 at 18 29.
The soil vents also known as a vent stack can let rats into your home.
On your roof seal off openings such as vent pipes.
Rats climb down and get into your plumbing system and get into your home through the toilet.