Rodent Exclusion and Entry Point Sealing in Corte Madera, CA

Trapping and removal deal with the animals that are already inside. Exclusion deals with the reason they got in at all. A mouse needs about a quarter inch of clearance and a rat about half an inch, so gaps around pipes, vents, garage doors and rooflines are all candidates, and a house rarely has just one. Once entry points are closed with the right materials, new animals following the same scent trail simply cannot get through.

Older homes on Christmas Tree Hill and around Chapman Park tend to need more exclusion work than newer construction, since decades of settling opens gaps around window trim, foundation edges and old plumbing chases that were never a problem when the house was built.

• Galvanized hardware cloth for vents, weep holes and utility penetrations.
• Sheet metal flashing for roofline gaps and chewed corners.
• Steel wool packed with sealant for smaller irregular gaps.
• Mortar or concrete patching for foundation cracks.

Roofline and soffit vents are a common entry point for roof rats, especially on properties near mature trees that give them a route onto the roof in the first place. Garage door bottoms and dryer vents let mice into homes closer to The Village Shopping Center. Older foundation vents and settled sills around the Old Town Square area let both species into crawl spaces and wall voids. Every exclusion job starts with confirming which of these apply to your specific address rather than assuming.

A technician identifies every entry point during the inspection, explains which material fits each one, and completes the sealing work in a single visit for most homes. Trim work around trees that overhang a roofline is sometimes recommended as a companion step, since a sealed roof gap does little good if a rat can simply chew a new one nearby. This work pairs directly with rodent trapping and removal when animals are still active at the time of the visit.

We check back to confirm the seals are holding and that no new activity has started elsewhere. If a homeowner later does landscaping or roof work that disturbs a sealed area, it is worth a quick check, since construction work is one of the more common ways an old entry point reopens.

The cost of an exclusion job depends on how many entry points are found and what material each one needs, from a simple door sweep to hardware cloth and mortar work at a foundation vent. A newer condo near The Village Shopping Center with one or two gaps costs less to seal than an older home near Christmas Tree Hill with entry points scattered across the roofline, foundation and garage. We quote the job after a full walk of the exterior, not from a flat per-house rate that ignores the real condition of a specific address.

Exclusion is often booked alongside rodent trapping and removal when animals are still active, and alongside rodent inspection and estimates when a homeowner wants the full picture before committing to sealing work. Either combination keeps the visit efficient instead of requiring separate appointments for finding, treating and sealing.

A recent addition, re-roof, or exterior remodel can open new gaps that did not exist before the work started, even on an otherwise well-sealed home. If you have had exterior work done in the last year or two and are now seeing rodent activity for the first time, mention that when you call. It usually points us straight to the area the work touched rather than requiring a full exterior search from scratch.

Foam, caulk and steel wool alone often buy a little time but rarely hold against a determined rat or a persistent mouse over many months. If you have already tried sealing a gap yourself and are still seeing activity, that is common enough that we check the DIY repair first during the visit. It often marks the exact spot that needs a more durable material rather than pointing to an entirely new entry point.

Exclusion work is inspected from both sides where possible, checking that a seal looks solid from inside an attic as well as from the roofline outside. A gap that looks closed from the ground can still have a weak point on the underside that only shows up on a closer attic-level check.