We say this to homeowners at least three times a week: trapping animals without sealing your home is like mopping the floor with the faucet still running. You can trap every squirrel in the neighborhood, but if the gap in your soffit is still wide open, new ones will move in before the week is out. That is why exclusion work is the single most important part of any wildlife removal job. It is the only thing that actually solves the problem for good.
Most homeowners have never heard the term "exclusion" before they call us. That is completely normal. It is a trade term, and unless you have dealt with a wildlife problem before, there is no reason you would know it. But once you understand what it is and how it works, you will never look at your roofline the same way again.
What Is Wildlife Exclusion?
Wildlife exclusion is the process of sealing every potential entry point on a structure so that animals cannot get inside. It is not about repellents, poisons, or scare tactics. It is about physically preventing access using materials that animals cannot chew, claw, or push through.
Think of it this way: your house is a box. If that box has holes, things will get in. Exclusion work closes those holes permanently. It is mechanical, it is measurable, and when done correctly, it is the only permanent solution to wildlife intrusion.
The key word there is "permanently." Trapping removes the animal that is already inside. Exclusion prevents the next one from finding its way in. Without both, you are on a treadmill. We have met homeowners who have been trapping raccoons out of the same attic for three years because nobody ever sealed the entry point. That is not a solution. That is a subscription service for raccoon relocation.
The Inspection Process
Every exclusion job starts with an inspection, and a good inspection takes time. We are not walking around your house for five minutes and handing you a quote. A thorough wildlife inspection of an average New Jersey home takes 45 minutes to over an hour, sometimes longer for larger properties or homes with complex rooflines.
Here is what we are doing during that time:
- Walking the full perimeter of the home at ground level, checking foundation vents, basement windows, utility penetrations, and any gaps where siding meets the foundation.
- Inspecting the roofline from a ladder, looking at every soffit joint, fascia board, ridge vent, gable vent, and chimney flashing. This is where most entry points are, and you simply cannot see them from the ground.
- Going into the attic to look for signs of current or past activity. Droppings, urine stains, disturbed insulation, nesting material, chew marks on wiring, and daylight coming through gaps all tell us exactly what species we are dealing with and where they are getting in.
- Checking secondary entry points that animals might not be using yet but could exploit in the future. A gap that is too small for a raccoon today might be perfect for mice tomorrow.
- Documenting everything with photos so we can show you exactly what we found, where, and what needs to happen.
The inspection is not just about finding where animals are getting in right now. It is about identifying every vulnerability on the structure. A good exclusion job addresses all of them, not just the obvious ones.
Common Entry Points We Find on NJ Homes
After thousands of jobs across New Jersey, we have seen animals exploit just about every weak point a house can have. But certain entry points come up over and over again. If you are a homeowner in NJ, these are the spots you should be paying attention to.
Soffit Gaps
This is the number one entry point we encounter. The soffit is the underside of your roof overhang, and it meets the fascia board at a joint that frequently develops gaps over time. Vinyl soffits are especially problematic because they expand and contract with temperature changes. A gap that did not exist in summer can open up to two inches wide in a cold January. Squirrels and raccoons both exploit soffit gaps regularly.
Ridge Vent Gaps
Ridge vents run along the peak of your roof and allow hot air to escape from the attic. They are covered by a cap that sits over the vent opening. Over time, that cap can lift, shift, or deteriorate, creating gaps that are invisible from the ground but perfectly obvious to a squirrel sitting on your roof. We find ridge vent issues on roughly 40% of the homes we inspect.
Gable Vent Screens
Gable vents are the louvered vents you see on the triangular end walls of your attic. They almost always have a screen behind the louvers, and that screen is usually lightweight aluminum or fiberglass. Raccoons tear through fiberglass screens like tissue paper. Even aluminum screens can be peeled back or chewed through by determined squirrels.
Pipe and Wire Penetrations
Every pipe, wire, cable, and conduit that enters your home creates a hole. Those holes are supposed to be sealed, and they usually are when the house is built. But sealants deteriorate, contractors cut oversized holes, and additions or renovations create new penetrations that nobody bothers to seal properly. Mice love these because they are often hidden behind utility boxes or landscaping.
Foundation Gaps and Cracks
Homes in New Jersey deal with freeze-thaw cycles every winter, and those cycles create cracks in concrete foundations. A crack that is a quarter inch wide is a mouse highway. We also frequently find gaps where the sill plate sits on top of the foundation wall, especially in older homes where the wood has dried and shrunk over the decades.
Chimney Gaps
The flashing where your chimney meets the roof is a classic entry point. Chimneys are masonry and your roof is wood. They move at different rates, and the seal between them fails over time. We also see a lot of uncapped chimneys, which are basically an open invitation for raccoons to climb right down into your home.
Roof-to-Fascia Junctions
Wherever your roof changes direction, such as at dormers, valleys, or bump-outs, there is a junction between the roof deck and the fascia board. These junctions are notoriously difficult to seal during construction, and even small gaps can be widened by animals. Raccoons in particular are strong enough to peel back aluminum drip edge to widen a gap that started at half an inch.
Materials We Use (And Why They Matter)
Not all sealing materials are created equal. This is one of the biggest reasons DIY exclusion fails. People use the wrong materials, and animals chew, scratch, or push right through them. Here is what we actually use on our jobs and why.
Galvanized Steel Mesh (1/4-Inch)
This is the workhorse of exclusion work. Quarter-inch galvanized steel mesh stops everything from mice on up. The quarter-inch specification matters because mice can squeeze through any opening larger than that. If you use half-inch mesh, you have excluded raccoons and squirrels but left the door open for mice. We use galvanized steel because it resists corrosion. Standard steel mesh rusts out in a few years, and then you are right back where you started.
Steel Wool Combined with Caulk
For smaller gaps and cracks, we pack steel wool into the opening and then seal over it with commercial-grade caulk. The steel wool provides a chew-resistant barrier while the caulk holds everything in place and makes it weatherproof. Neither material works well alone. Steel wool by itself can be pulled out, and caulk by itself can be gnawed through. Together, they are extremely effective.
Aluminum Flashing
We use aluminum flashing for larger areas where mesh is not practical, particularly around roof-to-fascia junctions and soffit repairs. It is durable, weather-resistant, and when installed correctly, blends in with the existing roofline. The key is proper fastening. Flashing that is caulked but not screwed down can be peeled back by raccoons.
Hardware Cloth
Hardware cloth is a heavier-gauge wire mesh that we use over gable vents, foundation vents, and other larger openings. It provides excellent airflow while preventing animal entry. We always secure it with screws, not staples. Staples pull out. Screws do not.
Expanding Foam (Never Alone)
Here is something important: expanding foam by itself is not an exclusion material. Mice and rats chew through spray foam like it is not even there. We have seen homeowners fill an entire gap with expanding foam and have mice break through it overnight. We do use foam, but only as a supplement to steel mesh or steel wool. It fills irregular voids and adds insulation value, but it is never the primary barrier.
Concrete and Morite Patches
For foundation cracks and masonry gaps, we use hydraulic cement or concrete patching compound. These are harder than the surrounding material when cured, so animals cannot dig them out. For larger foundation repairs, we sometimes combine concrete patches with embedded steel mesh for extra protection.
The Sealing Process, Step by Step
Here is what a typical exclusion job looks like from start to finish. Every job is different, but the general process follows this sequence.
- Step 1: Confirm animal activity and species. Before we seal anything, we need to know exactly what we are dealing with and whether the animals are still inside. Sealing an animal inside your home creates a much worse problem than the one you started with.
- Step 2: Set up trapping or one-way doors. We either trap the animals currently inside or install one-way exclusion doors that allow them to leave but prevent re-entry. The approach depends on the species and the situation.
- Step 3: Seal all secondary entry points. While the one-way door or trap is handling the primary entry point, we seal every other vulnerability on the structure. This is critical. If we leave secondary points open, the animals will simply find an alternative way in.
- Step 4: Monitor the primary entry point. We check the one-way door or traps on a regular schedule. Once we are confident all animals have exited, we move to the next step.
- Step 5: Seal the primary entry point. The last opening gets closed with the appropriate materials. At this point, the structure is fully secured.
- Step 6: Final walkthrough and documentation. We do a final inspection of all sealed areas, take photos, and walk you through everything we did. You get a clear record of the work that was performed.
Why DIY Exclusion Usually Fails
We respect the DIY spirit. Honestly, we do. But exclusion work is one of those jobs where doing it yourself usually means doing it twice, and the second time you end up calling a professional anyway. Here is why.
People Miss Entry Points
This is the most common issue. A homeowner finds the obvious hole where the raccoon is getting in, seals it up, and considers the problem solved. But there were three other gaps they never noticed because they did not get on a ladder, did not go into the attic, or simply did not know what to look for. A mouse needs a gap of just one-quarter inch. A rat needs only half an inch. Those are not gaps you notice casually. They require a trained eye and a systematic inspection.
Wrong Materials
We cannot count how many times we have arrived at a home where someone stuffed expanding foam into a gap and called it done. Rodents chew through spray foam in minutes. We have also seen people use steel wool alone (it rusts and falls out), chicken wire (the gauge is too light), and even duct tape. None of these are exclusion-grade materials.
Sealing from the Wrong Side
Certain entry points need to be sealed from outside. Others need to be sealed from the attic side. Some need both. The direction matters because of how water flows, how materials need to be anchored, and how animals apply pressure. Sealing a soffit gap from the inside of the attic, for example, often fails because the mesh cannot be properly secured to the soffit material from that angle.
Sealing Animals Inside
This is the biggest risk. If you seal your home without confirming that all animals are out, you have trapped them inside. A trapped raccoon will tear through drywall to get out. Trapped mice will die in the walls, and the smell is something you will not forget. We have done dozens of jobs where the homeowner sealed their home themselves and then called us a week later because something died in the wall or an animal was scratching through the ceiling trying to escape.
A proper exclusion job is not just about plugging holes. It is about understanding animal behavior, material science, building construction, and the right sequence of operations. That is what separates a permanent fix from a temporary patch.
Our 12-Month Guarantee
Every exclusion job we perform comes with a 12-month guarantee against re-entry. If an animal gets back in through any area we sealed, we come back and fix it at no charge. No questions, no fine print, no service fees.
We can offer this guarantee because we are confident in the materials, methods, and thoroughness of our work. When we seal a home, we seal it right. That means addressing every vulnerability, not just the obvious ones. It means using professional-grade materials that hold up to weather, temperature swings, and determined animals. And it means following a process that has been refined over thousands of jobs across New Jersey.
Exclusion work is an investment in your home. When it is done correctly, it protects your attic, your insulation, your wiring, and your peace of mind for years to come. The animals that were living in your attic? They will move on to a house that is easier to get into. And once your home is sealed, that will not be yours.
If you are hearing sounds in your attic, finding droppings, or just want to know whether your home is vulnerable, give us a call. The inspection is free, and we will show you exactly what we find.