Yes, a newer home can have rodent entry points. Builders and trades cut openings for plumbing, wiring, vents and gas lines, and the filler is not always chew-proof. We do not know how any given house was built, so treat this as a checklist, not a diagnosis.
Where gaps tend to hide.
Most new-home gaps are small and sit where one trade's work meets another's. The result is a hole that is just big enough for a mouse and invisible from the lawn.
| Spot. | What can be wrong. | A better fix. |
|---|---|---|
| Where pipes and lines enter walls. | Oversized holes with a ring of foam. | A metal collar with packed mesh and sealant. |
| Garage door corners and bottom seal. | Seal not fully contacting the slab. | Adjust the door or fit a longer seal. |
| Weep holes in brick. | Open slots at the base. | Vented covers that allow water out. |
| Roof and soffit vents. | Missing or loose screens. | Metal screens fastened with screws. |
| Dryer and bath vent hoods. | Flaps stuck open, no guard. | Metal guards that still let air through. |
Why newer homes are not exempt.
Animals do not care about age. A mouse enters a gap, and a gap is a gap. A new house may even look better than an old one to an animal, with clean insulation and a pantry. Landscaping adds shrubs and mulch right next to the wall, which give cover.
Ground work nearby can matter too. When soil is dug or cleared, animals living there may move. We cannot say that is happening around your home. It is one possible reason for activity that seems to come from nowhere.
A first-year walk-around.
- Check the garage door corners and look for light along the bottom.
- Examine every spot where a pipe, cable or gas line enters the wall.
- Look at roof and soffit vents for missing screens.
- Check weep holes and foundation vents.
- Note shrubs, mulch and stacked items touching the wall.
Take photographs of anything you find, with a coin for scale. If the house is under warranty, ask what it covers, and keep records.
Hearing something overhead after midnight? Phone any time, because the line is staffed all night.
Ring (888) 686-4821Closing gaps for the long run.
Sealing a new house uses the same materials as an older one. Pack steel mesh into the gap, then cover with sealant that bonds to siding, brick or slab. Metal plates cover larger openings. Foam can fill voids after the mesh is in, but should not be the only barrier.
Our exclusion page lists materials and method. If you are unsure whether you have a problem, an inspection finds out before you spend on repairs.
Signs that something is already inside.
Fresh droppings in the garage, scratching in a wall at night, a smell near the pantry or chewed packaging all mean animals are present. Do not seal until animals are out. A hole sealed around a live animal may send it farther into the structure.
Trapping removes the animals first. Once catches stop, sealing keeps new ones out. See trapping and removal for the process.
Make it a habit.
Put a recurring reminder on your calendar for spring and fall. Walk the outside, check the garage door and vents, and look at the base of the walls. Five minutes twice a year catches most problems.
When to call.
Call if you find gaps you cannot close, hear noises or see sign. Tell us the type of construction if you know it, and where you found the gap. A short description is enough to start.
Before we arrive: careful cleanup
Everything here repeats guidance from public health bodies, so any household can use it whether or not it ever books a service.
- Get dry waste damp before anything contacts it, and put the broom down.
- Shut-in rooms hold stale air, so throw open doors and windows and wait outside about thirty minutes.
- Hands stay covered throughout, then get a thorough wash.
- Keep applying liquid until no dry spot remains, then stand back for around five minutes before wiping.
- Droppings and wipes share one tight bag, and your skin never meets a dead animal.
- A physician alone can weigh how serious an exposure was, so reach out to one should fever or labored breathing set in.
Sources behind the safety tips
The links lead to the original wording, which carries no sales pitch.
- CDC page on cleaning up rodent waste: A damp-cleaning method for households, with a reason attached to each step.
- EPA page on restricted rodenticides: The reason the strongest products go only to licensed applicators and retail versions come in tamper-resistant stations.