A raccoon doesn’t require a lot of space to enter your attic. Neither does a rat, a bat, or even a squirrel that chews. Most homes have weak spots. Animals usually find these weak spots before people do. By the time you hear sounds like scratching in your walls, the damage has started.
That is why San Antonio citter evictors spend a lot of time checking where animals can get in, and not just getting them out. They know sealing the home is what keeps wildlife from coming back after you remove them. Here are nine common ways that critters can get in and how experts close these gaps for good.
1. Roof and Soffit Gaps
Soaked soffits and loose fascia boards are soft spots that allow rodents easy access into buildings. Once one rat makes a hole in the wall, all others will follow.
How experts seal it: Experts will repair the broken soffit and fascia boards and also install galvanized mesh screens on top of the holes to prevent further entry.
2. Gable Vents
Decorative gable vents may look safe at first. However, most of them just have thin screens. Over time, these screens will be pushed through or evaded by bats and birds.
How experts seal it: Professionals replace fragile vent screens with vent covers designed to keep bats, birds, and other pests out while still allowing airflow.
3. Roof Vents and Vent Boots
Squirrels often break plumbing and attic vents. They chew around the opening to make it bigger, so they can fit their bodies through the pipe housing.
How experts seal it: Professionals replace damaged vent boots and install protective vent guards made from chew-resistant materials to secure roof penetrations.
4. Chimney Caps

A damaged or open chimney will make the perfect entrance for raccoons. This animal loves exploring new places to see what is inside them, and a chimney is a great place to do that.
How experts seal it: Professionals fix this problem by installing chimney caps with strong steel mesh that allow smoke to escape without letting any raccoons enter.
5. Foundation and Pier-and-Beam Gaps
Many homes in San Antonio have pier-and-beam foundations. These often have crawl space openings. Skunks and opossums can get in through these openings. They use these spots to make nests under the house.
How experts seal it: Specialists secure crawl space openings with galvanized steel barriers or custom exclusion panels while maintaining proper ventilation beneath the home.
6. Utility Line Penetrations
Every time there is a cable, pipe, or wire entering the outside wall of a home, there must be an opening. Rats can squeeze into an opening which is slightly larger than the size of a coin.
How experts seal it: These openings are sealed up by experts through the use of steel mesh, flashing, and weather-resistant sealants.
7. Damaged Siding and Trim
Rats and other rodents use cracks in the siding as access routes into your property. Once they have gained access to your home through the siding, they will be able to move around in the walls of your building unseen.
How experts seal it: They will either repair or replace your damaged siding and trim and ensure that all possible access points are secured.
8. Attic Fan Louvers
Louvers of powered attic fans become weaker with age. Bats are particularly fond of them because they provide a nice shelter, being quiet, dark, and warm.
How experts seal it: Professionals install reinforced attic fan covers or protective screens that preserve ventilation while preventing wildlife from accessing the attic.
9. Garage Door Seals
A rubber seal on a garage door can wear down, allowing rodents such as rats, snakes, and opossums to enter the building during extreme weather conditions.
How experts seal it: Worn weather seals are replaced with heavy-duty garage door seals, professional window installations and any surrounding gaps are closed to prevent wildlife from entering.
Why Sealing Matters More Than Removal Alone

Getting rid of the animals that live there now is just half the job. If the entry spots are left open, another animal will move in fast. Sometimes it takes weeks, but other times they get in within days. This happens a lot in San Antonio. Wild animals use the same attic entry areas and gaps under homes again and again after the first group leaves.
Professional exclusion work is not just about attractive home exterior or fixing the main hole. It means checking the whole roofline, the foundation, and the vents, too. The people doing this work use things that animals cannot chew or rip apart. They use strong mesh and metal flashing instead of just foam or caulk.
The San Antonio citter evictors see this as two steps. First, they get rid of what is inside. Then, they seal every spot an animal might use to get inside again. When you do both together, it solves the problem, rather than being a temporary solution that fails every season.
FAQs
1. How do I know what entry point the animal is using?
You can look for new droppings, chew marks, grease trails, or flat parts in the insulation near a vent or a gap. These signs often show where the animal comes in. A pro can check your home and find the spot fast.
2. Can I seal these gaps myself?
You might be able to patch small gaps. But most entry points need special materials, and getting to them can be tough. Doing it yourself is not easy, especially when the gaps are on rooflines or under pier-and-beam crawl spaces.
3. Will sealing entry points trap an animal inside?
No. A good exclusion job will always check if the space is empty first. Or, it will use a one-way door before closing up the opening for good.
4. How long does exclusion work usually take?
Most homes get a full check and seal in about one day. The time may change if there are many spots where animals or pests get in or if there is damage that needs to be fixed.
5. Does sealing prevent all future wildlife problems?
Sealing the home cuts down the risk by a lot. Especially new homebuyers should consider looking at vents and seals every year. This way, you stop new places for animals to get into.
A home that is well sealed is not easy for animals to get in. When you check and fix every gap, vent, and opening in crawl spaces, wildlife can’t find a way to get inside. This is how you make sure you do not just remove an animal one time, but stop this problem for good.
