Introduction
Living in NYC means coexisting with pests — but they do not have to be inside your apartment. The most effective pest control strategy is exclusion: sealing the gaps, cracks, and holes that let them in. NYC apartments, especially in older buildings, are full of entry points around pipes, along baseboards, near windows, and through shared walls. This guide shows you how to find and seal these vulnerabilities yourself. Combined with good sanitation, exclusion dramatically reduces pest problems without relying solely on chemical treatments.
Step-by-Step Instructions
-
Step 1 Conduct a Thorough Inspection
Walk through every room with a flashlight and inspect along baseboards, around pipe penetrations under sinks and behind toilets, around radiator pipes, at window frames, and where cabinets meet walls. Mice can squeeze through holes the size of a dime and roaches through gaps the width of a credit card. Check behind the refrigerator and stove where utility connections enter the wall. In NYC apartments, also inspect around electrical outlets on shared walls — pests travel between units through wall cavities. Note every gap, crack, and hole you find.
-
Step 2 Seal Gaps Around Pipes and Utilities
Pipes passing through walls and floors are the primary pest highways in NYC apartment buildings. Use copper mesh or steel wool stuffed tightly into gaps around pipes — pests cannot chew through metal. Cover the mesh with a bead of caulk to hold it in place. For larger gaps around pipe clusters under kitchen and bathroom sinks, use expanding foam sealant rated as pest-resistant. Pay special attention to the gap where the radiator pipe enters the floor — in NYC steam heat buildings, this is a major pest entry point. Seal it with a decorative pipe escutcheon plus caulk.
-
Step 3 Caulk Baseboards, Trim, and Cracks
Apply paintable silicone or acrylic caulk along the top edge of all baseboards where they meet the wall, especially in kitchens and bathrooms. Caulk along window frames, door casings, and where cabinet backs meet the wall. Fill cracks in plaster walls — common in older NYC buildings — with spackle or caulk. Seal the gap between the kitchen counter and backsplash where crumbs accumulate and pests hide. Use a quality caulk gun with a smooth trigger for clean lines, and keep a wet finger handy to smooth beads. This work also improves energy efficiency.
-
Step 4 Install Door Sweeps and Screens
Install door sweeps on the bottom of your apartment entry door — the gap between the door bottom and the hallway floor is a main entry point for hallway-roaming pests. A good door sweep costs under fifteen dollars and installs in minutes with a few screws. Ensure window screens are intact with no tears or gaps around the edges. For windows without screens, install simple mesh screen kits that press into the frame. In NYC ground-floor apartments, also check for gaps around air conditioning units where they meet the window or wall sleeve.
-
Step 5 Maintain an Unwelcoming Environment
Sealing keeps pests out, but sanitation makes your apartment unappealing as a destination. Store all food in sealed containers — not just bags clipped shut. Take garbage out nightly in NYC apartments where trash sits in the kitchen. Fix any leaky faucets promptly — pests need water and will go to great lengths to find it. Clean under and behind appliances quarterly. Do not leave pet food out overnight. In NYC buildings where adjacent apartments may not maintain the same standards, your sealing efforts become even more important as your main line of defense.
When to Call a Professional
Call HandyMen NYC for a professional pest exclusion service where we systematically seal every entry point in your apartment. This is especially valuable in NYC buildings with ongoing pest problems where your neighbors' habits affect your unit. We use commercial-grade sealants and mesh that outlast consumer products. If you already have an active infestation, exclusion alone is not enough — we can coordinate with licensed pest control professionals for treatment and then seal to prevent re-entry.
Request a Pro