Rodent Exclusion and Entry Point Sealing in Littleton, CO

Trapping and removal clear what is already inside. Sealing is what keeps the next mouse or rat from simply replacing it. The two go together on almost every job we run in Littleton, and we explain upfront when a property needs both versus trapping alone.

A seal job starts with the same gap sizes used in the inspection: about a quarter inch for mice, roughly half an inch for rats. Anything that size or larger on the exterior, around vents, utility lines, foundation cracks, garage door tracks, gets logged and matched to a repair material.

Caulk alone does not stop a determined mouse, which can chew through it in days. We use steel wool packed into smaller gaps, galvanized hardware cloth for larger openings, and sheet metal or mortar repair for foundation and masonry gaps, matched to what the specific opening needs rather than one product used everywhere.

• Steel wool and sealant for small gaps around pipes and wiring.
• Galvanized hardware cloth for vents and larger openings.
• Sheet metal or mortar repair for foundation and masonry gaps.

Older homes near Littleton's historic core and the original townsite grid tend to have settled foundations with cracks that widen over the years, plus aging roof vents from a prior renovation. Newer construction further out usually has fewer gaps overall, but the ones that exist are often around a specific utility penetration or an HVAC line set that was never properly flashed. We bring the materials that match what the house actually needs, not a one-size kit.

We check the sealed points on the follow-up visit along with any traps still in place, confirming the repair is holding before calling the job finished.