You bought a brand-new home in one of Tucson’s growing subdivisions and assumed rodents were an old-house problem. Then you found droppings in the garage. New homes are genuinely tighter than older ones, but “tighter” is not “sealed,” and a few predictable gaps let rodents in. The upside: because there are few of them, proofing a new home is quick and lasts.
Why new homes still get rodents
Rodent pressure is a feature of the landscape, not the building’s age. A new house sits in the same desert, beside the same washes and basins, as an old one — and if it was built onto former desert or ranch land, construction just displaced the rodents living there straight toward the new streets. The tight envelope helps, but it does nothing about the population outside. See the new-development displacement effect.
The gaps builders leave
- The garage door seal. The number-one entry on a new home — roll-up door seals settle and wear at the corners, opening a mouse-sized gap within a year or two.
- Weep holes. Block and brick-veneer walls have unscreened weep holes at the base — big enough for a mouse or young rat, and rarely screened by the builder.
- Utility penetrations. Where plumbing, conduit, gas and cable enter, the gaps are often left unsealed or filled only with foam, which rodents chew.
- The garage-to-house door and shared wall penetrations — the route from garage to living space.
- Roof and vent details — usually good on a new tile roof, but worth a check.
The proofing sequence
On a new home the job is short and durable: fit a full-width garage door seal, screen the weep holes with steel covers, seal utility penetrations with rodent-proof material, weather-strip the garage-to-house door, and screen any vents. That handles the great majority of new-build entries. Add perimeter-wall weep screening and yard tidy-up on desert-edge lots where pack rat pressure is higher. See our exclusion service.
Do it before you have a problem
The best time to proof a new home is early — ideally before the first autumn, and certainly at the first sign of activity. Because the envelope is tight, sealing it proactively is cheap insurance that holds for years, unlike an older home that needs continual attention. If a new construction phase is going up near you, that is the moment to act, because the displacement wave is coming.
Quick answers
My home is brand new — do I really need this?
You need less work than an old home, not none. A handful of predictable gaps — the garage seal, weep holes, penetrations — are exactly where the local pressure gets in.
What is the most common entry on a new home?
The garage roll-up door seal, especially the corners, followed by unscreened weep holes and unsealed utility penetrations.
Why do I have rodents when my neighbours don’t?
Often position — an edge lot near desert or a wash, or being nearest a new construction phase. Sealing your specific gaps is what evens it out.
New home, first signs of rodents? Book a free inspection and we will close the builder’s gaps before it becomes a real problem.
Want every entry point sealed properly?
Our rodent exclusion service seals tile roofs, vents, weep holes and utility lines, listed in writing. See what rodent control costs in Tucson for real price ranges, or book a free inspection: species, every entry point and the scope in writing before anyone quotes you a number.
