Rats are very good at finding their way into the more inaccessible parts of people’s homes. When rats move into a property, they will often secrete themselves behind walls and build nests in dark, warm attics. If you can identify how they are accessing your attic, you can prevent more rats from moving in and set traps by any ingress and egress points.
Rats can squeeze through narrow gaps with ease. They aren’t quite as good as mice in this regard; rats lack the same ability to compress their bodies. However, rats can get through gaps that look much narrower than the rat’s bodies.
If you can hear rats scurrying about in your attic, or you actually see them when you go to investigate, working out exactly how they’ve managed to gain entry makes it much easier to clear them out. In some cases, rats will gain entry to the ground floor of a home and then make their way to the attic. However, there are also several ways that they can gain access to the attic directly. For example, rats are much better climbers than many people realise, and they often get into attics by climbing trees and running along branches that finish near the roof of a property.
Whenever you suspect a rat infestation in your attic, you should investigate immediately; the sooner you deal with an infestation, the easier it is to clear it out completely. Finding the entry point that rats are using and sealing it off will prevent more rodents from getting in and exacerbating the issue. It’s often easier to begin your search in the attic and work your way backwards. If you find a hole in your attic walls or floor that looks like a likely entry point for rats, seal it up and try to trace it back to the source.