Published 2026-06-27 · by David Yifrach, Owner, Seaside Garage Door Experts · Virginia DPOR Class A Contractor #2705188091
A Larchmont Garage With a Daylight Gap and Uninvited Roof Rats
A 1930s Larchmont home on the Lafayette River had a half-inch daylight gap under a two-car garage door, a heat-flattened vinyl bottom seal, and brown-rotted pine doorstop molding that let roof rats and palmetto roaches walk straight in, and we closed it for good with a coastal EPDM bottom seal, cellular PVC doorstop molding, and a stainless mesh anti-rodent core for $529. The homeowner on Mayflower Road in 23505 had set traps for a month before calling. The fix took one visit and about three hours, and the gap that had been feeding river-humid air and rodents into her garage for years is now a sealed perimeter rated for salt air. Below is the full diagnosis, why coastal Norfolk eats vinyl seals and pine trim faster than anywhere inland, the line-item 2026 cost, and how to tell if your own door has the same problem.
The call: a month of traps and the rats kept coming
The homeowner on Mayflower Road in the Larchmont section of Norfolk (23505) called on a Tuesday morning, tired and a little embarrassed. She had been finding droppings on the inside of the bottom garage door panel and along the baseboard for weeks, had set snap traps for a month straight, and the rodents kept coming back. She also mentioned the garage felt damp and smelled of the river even with the door shut. When she crouched and looked at the bottom of the closed door in daylight, she could see a thin ribbon of light running most of the width of the opening. That ribbon of light is the whole story, because anything you can see daylight through, a rodent can walk through.
Seeing daylight under your own door? Call (757) 777-3330 or book online. Same-day across Hampton Roads.
What we found around the perimeter
This was not a single bad part, it was a tired perimeter. The vinyl bottom seal had been baked flat by years of summer heat and no longer made contact with the slab on the high side, leaving a measured gap that opened to about half an inch at one corner. The aluminum retainer that holds the seal had corroded and pulled slightly away from the door, so even a fresh seal would not have sat right. Worst of all, the pine doorstop molding on both jambs had gone soft and punky at the base from brown-rot, the fungus that quietly eats coastal trim from the inside, and one strip flexed away from the jamb with light hand pressure, opening a side channel into the garage. We ran the pencil test along the bottom, a sharpened pencil slid under the seal in three places without resistance, which is a failed seal by any measure. The droppings were roof rat, the climber that is far more common along the Norfolk waterfront than inland.
Want a written, line-item quote before any work? Book a free on-site estimate or text a photo to (757) 780-5858.
Why Larchmont and the Lafayette River chew through seals
Larchmont sits on the Lafayette River, and the same water that makes the neighborhood beautiful is hard on a garage perimeter. Norfolk averages 46.9 inches of rain a year and runs near 70 percent average humidity, with an August peak around 74 percent, and that constant moisture does two things. It feeds the brown-rot fungi that hollow out pine doorstop molding within about five to seven years here, and it keeps the salt-laden coastal air working on every aluminum and steel part it touches. A builder-grade vinyl bottom seal that might give seven to ten years in a dry inland climate often gives only two to three years this close to the water. The City of Norfolk officially lists the Norway rat, house mouse, and roof rat as public health pests, and roof rats in particular are more common in coastal Hampton Roads than anywhere else in Virginia, so a gap here is not a maybe, it is an open invitation. The gap costs money too. The U.S. Department of Energy puts the garage-to-home interface at 10 to 13 percent of a home's total air leakage, and with Dominion Energy at 16.43 cents per kilowatt-hour as of June 2026, a half-inch gap feeding a humid garage is a line item on the power bill. If you want a second set of eyes on your own perimeter, our number is (757) 777-3330.
Already smelling the river inside your garage? Book the perimeter repair, we are usually there in 2 to 4 hours.
The perimeter rebuild, step by step
We fix the whole perimeter as one job so the homeowner is not calling us back in a month for the part we skipped. First we cleaned and reseated the aluminum retainer, knocking back the corrosion and re-fastening it true to the door. Then we slid in a coastal-grade EPDM bulb bottom seal, because EPDM shrugs off salt air and ozone in a way vinyl cannot, and we upgraded the inner channel with a stainless steel mesh anti-rodent core so that even a determined roof rat that chews the rubber hits steel and stops. Next we tore out both rotted pine doorstop molding strips and the header strip and replaced them with cellular PVC, which does not rot, fastened with stainless steel screws so the fasteners outlast the trim. Finally, because the slab dipped on the low corner, we set a threshold strip on the floor to take up the unlevel spot and give the new seal a flat surface to press against. The homeowner texted us two photos of the inside panel afterward to (757) 780-5858 so we had a before-and-after on file.
Questions before you commit? Ask us first, no obligation and no pressure.
The line-item cost
Everything was line-itemed before a tool came out, which is how we quote every job. For this two-car door the perimeter rebuild broke down like this:
- Two-car coastal EPDM bottom seal, installed: $289
- Cellular PVC doorstop molding, both jambs and header, replacing the rotted pine: $349
- Stainless steel mesh anti-rodent core upgrade: add $80
- Threshold strip for the unlevel slab corner: add $95
- Retainer cleanup and reseat: included
Because we bundled it as one combined two-car perimeter job rather than three separate trips, the work landed at $529 all in, inside the typical $449 to $549 range for a combined coastal rebuild. A single-car EPDM bottom seal on its own runs $249, a two-car runs $289, and doorstop molding for both jambs and the header runs $249 to $349 depending on how much trim has to come out.
Ready to close the gap for good? Book your seal and doorstop rebuild or call (757) 777-3330.
What the homeowner should expect now
The traps came up empty the following week, which is the result that matters. With a coastal EPDM seal, a stainless mesh core, PVC doorstop molding, and a threshold strip, this perimeter is built for the Lafayette River, not against it, and it should hold for many years rather than the two to three a vinyl seal would have lasted. We told her to glance under the door in daylight twice a year and to call if she ever sees that ribbon of light return. For homeowners who want to understand the parts before they buy, we lay out the seal options on our bottom seal and doorstop replacement page, walk through the rodent and energy angle in our garage door seal, rodents, and energy guide, and show the simple at-home check in our pencil test how-to. This Larchmont job was close kin to a Sandbridge rodent-breach rebuild we did earlier this month, and we cover the rest of the city on our Norfolk service area page.
Not sure which seal profile you have? Send us a photo and we will tell you, free.
Frequently asked questions
How big a gap under a garage door is a problem?
Any visible daylight is too much. A mouse can get through a gap as small as one quarter inch and a rat needs only about one half inch, so a thin ribbon of light under a closed door is already wide enough for rodents. On the coast the gap also lets in humid, salt-laden air that drives up the power bill.
How much does a bottom seal and doorstop replacement cost in Hampton Roads in 2026?
A single-car EPDM bottom seal runs about $249 installed and a two-car about $289. Doorstop molding for both jambs and the header runs $249 to $349. A combined two-car perimeter rebuild, seal plus jambs plus header, typically runs $449 to $549. A stainless mesh anti-rodent core adds $40 to $80 and a threshold strip adds about $95.
Will a new bottom seal really keep rats out?
A plain vinyl or rubber seal closes the gap but a determined roof rat can chew through it. To keep rodents out for good we add a stainless steel mesh anti-rodent core inside the seal channel, so anything that gnaws the rubber meets steel and stops. Pairing that with PVC doorstop molding closes the side channels too.
How long will a coastal EPDM seal last in Norfolk?
Longer than vinyl. Standard vinyl seals often last only two to three years this close to the water, while EPDM resists salt air and ozone and holds up far better in coastal humidity. With a yearly daylight check it should give many years of service on a Larchmont or Ocean View door.
Can I just replace the garage door bottom seal myself?
You can slide in a new bottom seal yourself if the retainer is sound and the slab is level. The reason this Larchmont job needed a pro was the corroded retainer, the brown-rotted pine doorstop molding, and the unlevel slab corner, which a drop-in seal alone would not have fixed. If you see soft trim or a corroded channel, it is a perimeter job, not a seal swap.
How long does a perimeter rebuild take?
One visit. This combined two-car job, bottom seal, both jambs, header, mesh core, and a threshold strip, took about three hours start to finish, and the door was back in normal use the same afternoon.
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.