Grey Squirrels in attics in the Houston area are very common especially starting in September.  This coincides with other rodents and is usually the beginning of their “breeding season” characterized by rodents entering structures that we inhabit.  This season is usually triggered by a change in temperature as we enter the fall season.  Grey Squirrels, like other rodents, enter our structures by either chewing a hole or exploiting an existing construction gap or other weakness.  Grey Squirrels tend to chew larger holes than roof rats but both prefer places that are “hidden” from sight if available.
To distinguish what type of attic rodent you have the first question to ask is what time of day are you hearing the noise.  If the noises are heard at night most likely you are dealing with roof rats or even flying squirrels.  If the noise is heard during the morning hours and then in the evening most likely it is Grey Squirrels.  Other noises associated with Grey Squirrels are gnawing or chewing sounds coming from the attic or on exterior materials, especially wood.  Trim and fascia boards on homes and businesses become the grinding stone for squirrels as they file down their ever growing teeth.  They are also attracted to the rubber and plastic electric wire coverings found in attics which can be extremely hazardous.
If you suspect squirrels in your attic the best move you can make is call a Houston Animal Removal company.  Squirrels can be very determined and squirrel trapping by home and business owners who are not experienced can be dangerous.  This can also lead to squirrels becoming very wary of people and traps and make the removal process more difficult.  Many people attempting to remove squirrels will get on ladders trying to get too hard to reach places and can fall and injure themselves in the process.  Calling someone experienced in this type of removal will usually result in a better, safer outcome for the property owner and for the squirrels.