Rodent Exclusion and Entry-Point Sealing

Exclusion is the right call when the rodent problem keeps coming back. If you set snap traps under the kitchen sink in Historic Hyattsville, caught four mice, and found fresh droppings three weeks later, the house has an open door somewhere. Older brick foundations across Historic Hyattsville and Castle Manor develop deteriorated mortar joints and open weep holes; 1950s-era homes in University Hills and Queens Chapel Manor often have crawlspace vents with rusted-out screens and gas or water lines entering through holes cut oversize decades ago. In rowhouse and duplex blocks near West Hyattsville and the Arts District, mice travel along shared party walls and through the joist pockets between units, which is why one unit can stay clean while the neighbor's kitchen feeds the whole run.

The alternative — a bait-and-trap-only program — has a place. If you need numbers down fast before a tenant walk-through or a restaurant inspection, trapping works in days and costs less up front. The trade-off is that it never ends: pull the traps and the population rebuilds from outside. Rats along the Northwest Branch corridor behind Driskell Park, the Northwest Branch Trail, and the storm drain system feeding the Anacostia tributaries are a permanent neighborhood presence, not a one-time visitor. Dumpster areas near The Mall at Prince George's and the alley trash setouts in Kirkwood and Lewisdale keep pressure on nearby foundations year-round. Sealing is what changes the outcome, and it is why we inspect before quoting rather than pricing off a phone call.

What the inspection actually looks like: we walk the full perimeter at grade with a flashlight, check the sill plate line, garage door corners and thresholds, dryer and bath vents, hose bib and A/C line penetrations, basement window frames, and any stair-well or English-basement entry common in West Hyattsville and Riverdale Heights. Rub marks, gnaw damage on wood or vinyl, and droppings tell us which openings are active versus cosmetic. Inside, we check under sinks, behind the range, around the water heater and furnace flue, and inside the crawlspace where accessible. You get the list of openings with locations, so you can see exactly what you are paying to close.

Materials matter more than labor hours here. Expanding foam alone is not exclusion — rodents chew straight through it. We back every opening with metal: hardware cloth, sheet metal flashing, copper mesh, or cement, then finish for weather and appearance. Roof-level work in Hyattsville Hills — gable vents, soffit returns, and gaps behind fascia where squirrels and mice enter — needs ladder access and takes longer than grade-level sealing, and we say so in the estimate rather than after. For landlords and small-property owners, we can time the visit around tenant access and provide the written entry-point record that supports a Prince George's County rental file. Structural repairs beyond sealing — a rotted rim joist, a failed retaining wall, a collapsed crawlspace vent frame — get flagged for a contractor instead of quietly patched over.