Contrary to what many people believe, pests do not disappear in winter. What is certain is that no longer seen in many places but this does not mean they've exterminated but simply took refuge from inclement weather.
The winter pest cockroaches and rodents
When winter comes the cold, snow, rain and low temperatures especially, rats, mice and cockroaches leave the streets and drains to seek refuge inside our homes, where they are given the necessary conditions to live and reproduce .
Keep in mind that within our homes, using heating are creating an artificial climate conducive to the development of such pests. That is why despite suffering from cold waves, snow, rain, etc.. People still have problems with cockroaches and rats or mice.
Pests in winter usually take refuge in the roof air chambers
Rodents overcoat will try shelter inside the air chamber roof. This occurs due to the escape of drains, can find a rabbet (elbow downspout connection between our house and the drain collector general) that is defective or broken, accessing the slot that has the false column constructed that pass the riser pipe, so rodents enter our inner tubes, using them to nest and breed.