Entry Point Sealing in NYC

Sealing stops mice from using the openings you closed, but only if every route is found and the material holds. Mice already inside must be trapped or removed first, or they stay sealed in with you. Sealing without an inspection tends to miss gaps behind appliances, inside wall voids and around pipe sleeves.

Materials rodents cannot chew through, matched to the opening. That usually means metal mesh or hardware cloth, sheet metal, and cement or masonry fillers for masonry gaps. Foam or plain caulk on its own is not enough because rodents chew it out. The right choice depends on what the opening is, what surrounds it and how it will be used.

Rats can use damaged drain or sewer lines, and gaps where pipes pass through walls and floors are a common way in. Coming up through a toilet is rare and usually points to a broken line. An inspection that looks at the lines and every pipe penetration is how you find out which applies to your building.