Why exclusion outlasts every other step.
Traps clear out the animals already inside, and sealing blocks the ones still outside. A house with a tight envelope can lose a mouse problem for years, while a leaky one hosts a new family every season. In a region with hard winters, the first cold nights test every weak point.
Rodents do not need a hole they can walk through. A mouse squeezes through a seam about as wide as a pencil, and a rat gnaws an opening wider over a few nights. Any material soft enough to chew will eventually be chewed.
Where entries hide.
The usual suspects are low, hidden or boring. We check them in the same order every time, starting with the places that are easiest to miss from inside the house.
| Spot. | What we look for. | How we close it. |
|---|---|---|
| Foundation and sill plate plate. | Hairline cracks, gaps beneath the sill plate, crumbling mortar. | Mesh and cured sealant, or a referral for masonry repair. |
| Utility penetrations. | Loose collars around pipes, cables and gas lines. | Metal collars and sealant. |
| Vents and chimney. | Torn screens, missing caps, loose flashing. | Steel mesh, metal caps and new flashing. |
| Garage door and thresholds. | Worn bottom seals, gaps at the corners. | New seals, corner guards, threshold repair. |
| Soffits and roof edges. | Gaps behind fascia, lifted drip edge. | Metal flashing and mesh. |
Older buildings and stone work.
Many buildings around Blauvelt have stood a long time, and older foundations and additions can have seams newer houses lack. That tells us where to look and does not tell us what we will find. A flashlight and a mirror along the sill answer the question.
When the issue is crumbling mortar or a structural crack, sealing is a stopgap and a mason is the real fix. We say that plainly and still close what we can so the animals are kept out meanwhile.
Sequence and timing.
- Walk the building and mark every opening with a number.
- Trap until catches slow, so nothing is shut inside.
- Seal from the bottom up, so animals leave through the last open gap and not the first.
- Return to test the work and note any new activity.
The order matters as much as the materials. If you want the full sequence, our inspection page shows how the walk-through feeds the sealing list, and trapping and removal shows how catches guide the timing.
Would you rather talk than read? Dial the number and a person answers, any hour.
Dial (888) 686-4821What we do not promise.
A sealed house is much harder for rodents to enter, but we cannot promise none will ever return. Trees touch roofs, new gaps open as buildings age and neighboring properties change. Regular checks catch the next gap early, and we recommend a look each autumn before the cold arrives.
Before you call, set the broom aside
Cleanup is mostly about not stirring dust, and the list below shows how.
- Brooms and vacuums are the wrong tools, because both stir settled droppings into the air where you breathe them.
- The CDC suggests thirty minutes of airing for a closed space, and only after that does the cleaning begin.
- Cover your hands during the job and scrub them with soap and running water once it is done.
- Soak first, wait a few minutes, then pick everything up with paper towels.
- Close the bag tightly and place it in the ordinary household trash.
- Should something seem off later, mention the cleanup to a doctor, who can judge what matters.
Read the agencies' own words
Titles and links to the full documents appear just below.
- CDC steps for lowering hantavirus risk: The origin of the sealing and housekeeping advice here.
- CDC walkthrough for cleaning up after rodents: The CDC's own wording for venting, soaking and bagging, in that order.