Published 2026-06-30 · by David Yifrach, Owner, Seaside Garage Door Experts · Virginia DPOR Class A Contractor #2705188091
Palmetto Bugs and Roof Rats Under the Door: What We Fixed This Month
Every garage pest intrusion we traced this month in Hampton Roads, palmetto bugs in Norfolk, a roof rat in a Chesapeake attic, and a column of ants in Virginia Beach, came back to one failure: a bottom seal baked hard and flat by summer heat, leaving a gap under the door wide enough to walk a mouse through. The pattern is so consistent that when a homeowner calls us about bugs or rodents in the garage in June or July, the first thing we ask them to do is shine a light along the bottom of the closed door. Nine times out of ten there is daylight where there should be a tight rubber seal. Here is why coastal seals fail on a clock, how small a gap the local pests actually need, and what it costs to close it for good.
The pattern: three pest calls, one root cause
Over about three weeks this month we took three calls that sounded unrelated. A Larchmont homeowner in Norfolk was finding palmetto bugs, the big coastal roaches, crossing the garage floor at night. A family near Greenbrier in Chesapeake heard scratching overhead, and a pest inspector confirmed a roof rat had reached the attic by way of the garage. A homeowner off Holland Road in Virginia Beach had a steady line of ants marching in under the door. Three different pests, three different cities, and when we looked at the bottom of each door we found the same thing: a bottom seal gone stiff, cracked, and flat, with a visible gap at one or both corners. You can see the towns we cover on our Norfolk service area page.
That is not a coincidence. It is the season.
Seeing bugs or droppings inside the garage? Book a free on-site estimate or text photos to (757) 780-5858.
Why your bottom seal fails fastest in a Hampton Roads summer
A garage door bottom seal is a strip of flexible rubber or vinyl that squashes against the slab to close the gap under the door. The cheap vinyl seals that come on most builder doors are the problem. Vinyl hardens as it ages, and our climate ages it fast. Norfolk averages 46.9 inches of rain a year and runs near 70 percent humidity, with August often peaking around 74 percent, and the ultraviolet load of a Tidewater summer plus the heat baking off a south-facing driveway cooks a vinyl seal until it loses its flex. Once it stops squashing flat, it stops sealing. On the coast a vinyl bottom seal often lasts only two to three years before it goes hard, where the same strip inland can run seven to ten.
The fix that lasts is a switch in material. EPDM rubber, the same compound used in roofing membrane, shrugs off salt air, ozone, and ultraviolet far better than vinyl and stays flexible across a much wider temperature range. That is what we install, and it is the single biggest reason a reseal holds here.
Want it sealed before the next heat wave? Book the seal replacement, most jobs take under an hour.
How small a gap pests actually need
People underestimate how little room a pest needs. A house mouse can squeeze through a gap about a quarter of an inch, roughly the width of a pencil. A Norway rat needs about half an inch. Palmetto bugs and ants need almost nothing. So the flattened seal that looks like a minor cosmetic issue, with maybe a quarter-inch of daylight showing at a corner, is a wide-open door to every crawling thing in the neighborhood. The City of Norfolk officially lists the Norway rat, the house mouse, and the roof rat as public health pests, and the roof rat in particular is more common along the Hampton Roads coast than anywhere else in Virginia. A failed seal is how most of them get from the driveway into the garage, and from the garage into the house.
Not sure how big your gap is? Ask us first and send a photo, no obligation, no pressure.
What the pest companies get right, and where they stop
If you have already had a pest company out, you have probably heard this. The exclusion pages from Aptive, Getem, and the other Hampton Roads pest firms all tell homeowners the same thing: seal the gap under the garage door, because it is a primary entry point. They are correct. The trouble is that sealing a garage door correctly is door work, not pest work, and most pest companies stop at the recommendation. They do not carry the right seal profiles, they do not swap a corroded aluminum retainer, and they do not true a door that is sitting unevenly on the slab. That is the part we do. Think of it as a handoff: the pest company identifies the entry point, and we close it for good with the right material and a proper fit.
Already had a pest inspection? Book the seal fix that closes the entry point for good.
The fix, and what it costs in 2026
Closing the gap is usually a same-week, under-an-hour job, and the pricing is line-item and flat. A single-car door gets a fresh EPDM bottom seal for $249, and a two-car door runs $289. If the aluminum retainer that holds the seal is corroded, which is common on older coastal doors, replacing it adds about $85. For homes with a real rodent history, we install a stainless-steel mesh anti-rodent core inside the seal so mice and rats cannot simply chew back through the rubber, which adds $40 to $80. If the side jambs are the problem, rotted doorstop molding on both jambs and the header runs $249 to $349, and a combined perimeter job on a two-car door, bottom seal plus jambs plus header, runs $449 to $549. If the slab itself is uneven and the gap will not close with a standard seal, a threshold strip bonded to the floor adds about $95. You get the number in writing before any work starts.
You can see the full scope on our bottom seal and doorstop replacement page, and a real coastal example in our Sandbridge rodent-breach rebuild.
Ready for the written number on your door? Book online and we will close it this week.
How to check your own seal tonight
You can diagnose this yourself in two minutes. Close the door, step into the garage with the lights off in the daytime, and look along the bottom. If you see daylight anywhere, especially at the corners, the seal is not sealing. The other test is the pencil test: try to slide a standard pencil under the closed door, and if it fits, so does a mouse. Press the seal with your fingers; a healthy seal is soft and springs back, while a failed one is hard, brittle, or cracked. We walk through this in detail in our guide on how to test a garage door bottom seal, and the longer story on seals, rodents, and energy is in our Hampton Roads seal and rodent guide. If you would rather just have it handled, call us at (757) 777-3330 or send a photo of the gap and we will tell you what you are looking at.
Rather have it handled start to finish? Send us a photo and we will tell you exactly what it needs.
Frequently asked questions
Can pests really get into my garage through the bottom seal?
Yes, and it is one of the most common entry points on the coast. A house mouse fits through a quarter-inch gap and a Norway rat through about half an inch, so a flattened or cracked bottom seal with daylight showing at a corner is an open door. Palmetto bugs and ants need even less room.
How often do garage door bottom seals need replacing in Hampton Roads?
On the coast a cheap vinyl seal often lasts only two to three years before heat, humidity, and ultraviolet make it hard and flat, where the same strip inland can run seven to ten. Switching to EPDM rubber, which resists salt air and ozone, stretches that lifespan considerably. Check the seal every spring and after any hot summer.
Will a new bottom seal actually keep mice and rats out?
A correctly fitted EPDM seal closes the gap they use, but rodents can chew through plain rubber over time. For homes with a real rodent history we add a stainless-steel mesh anti-rodent core inside the seal so mice and rats cannot gnaw back through, for about $40 to $80 more. Side jambs and corners have to be sealed too.
How much does it cost to replace a garage door bottom seal in 2026?
A single-car EPDM bottom seal is $249 and a two-car is $289. A corroded retainer adds about $85, a stainless mesh anti-rodent core adds $40 to $80, doorstop molding on both jambs and header runs $249 to $349, and a combined two-car perimeter job runs $449 to $549. You get a line-item written quote before any work.
What is the best bottom seal material for a coastal garage?
EPDM rubber. It is the same compound used in roofing membrane and it resists salt air, ozone, and ultraviolet far better than the vinyl that comes on most builder doors, and it stays flexible across a wide temperature range. Vinyl is cheaper up front but goes hard in two to three years here, so EPDM is the better value on the coast.
Ready for a written quote?
Free on-site estimate across our Hampton Roads core service area. 74 five-star Google reviews. 5-year workmanship warranty. Licensed and insured.