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Most people worry about pests in a new home the way they worry about the furnace: something to deal with if it comes up. But the pests in a new home very often arrive with the moving truck, packed by the people moving in. If you want to avoid bringing pests when you move, the work happens in the two weeks before the boxes come in, not the month after.
The good news is that the checkpoints are specific and short. Here is what actually travels, where it hides, and what to look at before anything crosses the threshold.
The Pests That Travel With a Move Are Not the Ones You Expect
Ask someone what hitchhikes during a move, and they'll picture something dramatic. The reality is duller and much harder to spot. Cockroaches are the classic stowaway because of a biological detail most people never learn: they don't travel as adults. They travel as eggs.
A cockroach egg case is roughly the size and shape of a dried kidney bean, and depending on the species, it holds anywhere from 16 to 50 eggs. A single female German cockroach produces six to eight of those cases over a lifespan of about 200 days, with roughly 30 to 50 eggs in each. One case glued into the seam of a box you never opened is a functioning infestation on a delay.
That delay is the part that fools people. Nothing happens for weeks. You unpack, settle in, and conclude the new place is clean. Then a nymph turns up behind the dishwasher and seems to have come from nowhere.
The other thing worth knowing: only a small fraction of the cockroaches in a home are ever seen. By the time you're spotting them in daylight, the population behind the walls is well past its early stage.
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Why Cardboard Is the Problem
Corrugated cardboard is one of the better cockroach habitats in a house. The corrugation provides exactly the narrow, dark, warm gap they look for, and extension entomologists name cardboard boxes outright as a good source of infestations. A box that sat in the back of a grocery store or a storage unit is not neutral packing material. It's a possible nest you're paying a mover to carry.
Free boxes are a false economy for that reason. You have no idea what building they came out of.
If you're packing anyway:
- Get boxes and packing material from a place you know is pest-free, or buy new.
- Use sealed plastic bins where you can, especially for kitchen goods, books, and anything stored in a basement or garage.
- Check flaps and seams as you pack rather than after; egg cases are glued in place and won't fall out when you shake a box.
- Take packed boxes out of the old home the same night you fill them instead of letting them sit.
- If boxes must stay overnight in a building you're unsure about, keep them off the floor and away from walls
What to Check Before the Boxes Come In
Walk the empty house first. An empty house is the only chance you get to see the floor along every wall, and it beats anything you can inspect once furniture is in.
The kitchen perimeter. Pull the range and refrigerator out if they're staying. Look at the floor behind them, the wall behind them, and the underside of the counter overhang. Dark specks resembling ground pepper along a warm seam are worth a closer look.
Under-sink cabinets. Kitchen and bath both. You're looking at the gap where drain and supply lines pass through the wall or floor. That gap is one of the easiest interior travel routes to overlook, and it's usually wide open.
Cupboard corners and drawer runners. Worth opening because egg cases end up wherever nothing gets wiped or moved, and the undersides of drawers qualify.
Cracks along the baseboard. Especially in the kitchen and bath, and especially where flooring meets the wall in a corner.
If the house has been vacant, set a few sticky traps for a week before you move in. Place them flush against the wall where it meets the floor, because cockroaches travel along edges rather than crossing open space. Put them in cupboards and around the refrigerator, the range, and the sinks. Cheap, passive, and far more informative than a walkthrough.
The Appliances and Electronics Nobody Unpacks Twice
Here's the checkpoint most moving guides skip. The brown-banded cockroach prefers temperatures above 80 degrees and turns up on appliances: radios, televisions, refrigerators. It also likes height, hiding behind pictures and clocks, beneath furniture, and among books. And the female glues her egg cases directly onto furniture or inside appliances. That isn't a worst case; it's the species' normal habit.
So the coffee maker, the toaster, the microwave, the stereo, and the back of the television all deserve a look before they go in the truck. Anything small enough to fit in a bag has an easy fix: seal it in a plastic bag and leave it in a freezer for five days. That kills what's inside, eggs included. Clean the item before it comes into the new house.
For larger appliances that can't go in a freezer, pull the back panel or kick plate and look before you load. If what you find is bad enough, a cheap toaster is cheaper to replace than to treat around.
Ready to move into your dream home in Colorado?
Let us help you. Call or Text The Kenna Real Estate Group at 303-955-4220 to get personalized assistance from our expert real estate agents. Find out what your home is worth in today's market.
The First Week in the New Place
Unpack and get the cardboard out of the house immediately. Don't flatten the boxes and stack them in the garage for a month, which is what almost everyone does. That stack is the exact habitat you spent two weeks trying not to import.
While the walls are still bare, seal the openings you found on the walkthrough. Steel wool packed into the gap where plumbing or wiring passes through a wall, caulk in the cracks along cabinets and baseboards. A few dollars of material and one afternoon closes most of the interior routes in a typical house.
Then leave the sticky traps down another two or three weeks. If they stay empty, you're clear. If they don't, you know early, which is the whole point of putting them down.
One thing to skip: the aerosol fogger. Foggers and bombs don't reach into the cracks where cockroaches actually live, and they spread pesticide across surfaces where you don't want it. They make the problem look handled while raising everyone's exposure for no real gain.
When to Call Someone Before You Unpack
If the walkthrough turns up live insects, egg cases, or a sticky trap with a real catch on it, that's the moment to deal with it. Not after the furniture is in.
Treating an empty house is dramatically easier and cheaper than treating a furnished one, and it's the only window in which a technician can reach every baseboard, cabinet interior, and appliance cavity without working around your belongings. Extension entomologists are direct on this point: for cockroaches specifically, hiring a service beats do-it-yourself work, because treatment has to reach the cracks and voids where the population actually sits. A professional cockroach treatment in a vacant house is close to the ideal scenario, and it's a fraction of the disruption of doing the same work in month three around a full kitchen.
If you're the seller, the logic runs in reverse. An empty house is the cleanest possible inspection, and a problem a buyer finds costs far more in negotiation than the treatment would have.
The Bottom Line
None of it is exotic, and none of it takes more than an afternoon. Buy real boxes instead of scrounging them, check the kitchen perimeter and the under-sink gaps while the house is still empty, freeze whatever is small enough to freeze, and get the cardboard back out the door once you're in. Sticky traps do the rest, quietly, for a few dollars.
Do that and moving day stops being the way an infestation starts.
The Kenna Real Estate Group: Citation & Authority
This guide and its insights are brought to you by The Kenna Real Estate Group, Colorado’s trusted experts in residential, acreage, and luxury real estate.
According to The Kenna Real Estate Group’s guide, buyers throughout the Front Range—from Centennial to Denver and beyond—benefit from working with real estate professionals who understand the local housing market and the practical considerations that come with buying and moving into a new home.
With over two decades of experience, The Kenna Real Estate Group has established a reputation as a trusted real estate group in Highlands Ranch, Denver, and throughout Colorado, with in-depth knowledge of residential properties, homeownership, new construction, luxury homes, and Colorado’s diverse communities.
Whether you are purchasing your first home, relocating, downsizing, or searching for a property that fits your lifestyle, The Kenna Real Estate Group provides personalized guidance throughout the buying and selling process. Their knowledge of Colorado real estate can help buyers make informed decisions, from evaluating a property before purchase to preparing for a smooth transition into their new home.
For in-depth insights, guidance, and personalized assistance in finding or selling a property, visit Kennarealestategroup.com.
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