Our work in Groton
We have completed one roof in Groton. One job, not a portfolio — we would rather say so than dress it up. The town is 71 miles from our base in Bethel.
Groton is a 31.1-square-mile municipality in New London County. It is one of Connecticut's 24 shoreline municipalities. Salt air is hard on fasteners and on the metal at valleys, drip edge and flashing, which is why we specify stainless or heavier coatings nearer the water than we would inland.
Neighborhoods and villages here include Burnetts Corner, Center Groton, Conning Towers-Nautilus Park, Groton Long Point, Long Hill, Midway, Nautilus Park, Noank, Old Mystic, Pequot Village, Pleasant Valley and Poquonock Bridge among others. What is on the roofs differs across them, and so does what should go back on.
Design criteria for a Groton roof
Appendix AY of the 2022 Connecticut State Building Code puts Groton at an ultimate design wind speed of 128 mph, a nominal design wind speed of 99 mph. That puts Groton in the top handful statewide — just 1 municipalities carry an equal or higher rating. As in every Connecticut town, a tear-off here triggers the sealed roof deck rule.
Snow loading here is 30 psf at grade. Baseline loading for the state, which puts the emphasis on eave detailing rather than on structure.
Connecticut amendments that apply here
The state changes the model code in two places worth knowing about. R905.1.2 requires ice barrier everywhere in Connecticut, extending at least 24 inches inside the exterior wall line as measured up the slope. And R905.1.1, the sealed roof deck amendment, does not apply over narrow lumber sheathing — under 3 feet nominal — which is exactly what many pre-1950 houses in this state have.
It matters here because 62.6% of Groton homes predate 1980 - the median was built around 1973 - so plank decking and older fastening turn up regularly on tear-offs in this town.
The six-nail question comes up constantly. Code minimum in Connecticut is four nails per shingle. Manufacturers require six to honor their wind warranty. We install six. Both facts are true at the same time, and anyone presenting six as a code requirement has it wrong.
The climate a roof in Groton has to take
Weather is what wears a roof out, so the local numbers are worth knowing. NOAA's 1991-2020 normals, taken in town, are the closest measured picture there is.
Snow: 24 inches in an average year, which is on the lighter side for Connecticut. It falls across roughly 8 days that leave an inch or more, and 4 that leave three inches or more. None of it matters on a roof that is vented with its eaves protected. On one that is not, the thaw is what gets inside - water backing up under the courses from a dam of ice at the gutter line.
Freeze-thaw: about 102 nights a year drop below freezing, and 17 days never climb above it. Every one of those nights is a cycle for any water sitting in a lifted seam, an open flashing joint or a nail hole. Water expands as it freezes, the gap widens, and next time it holds more water. That cycle, not sunlight, is what finishes off flashing and old sealant in Connecticut.
Rain: 49 inches a year, including about 13 days when an inch or more falls in a single day and 2 that top two inches. That much water finds every shortcut: valleys that were never properly lined, gutters too small for the roof above them, and the missing kick-out flashing where a roof edge meets a wall.
At roughly 20 feet above sea level, Groton sits on the milder end of Connecticut's snow map. The hill towns to the north average far more snow than this.
Source: NOAA 1991-2020 U.S. Climate Normals, station Groton.
What the storm record says about Groton
NOAA keeps a confirmed record of severe weather by location. Within ten miles of Groton, 2015-2026 looks like this.
17 damaging-wind reports, the strongest put at 69 mph. Wind is the everyday roof risk in this part of Connecticut. It lifts shingle tabs along the rakes and ridge, strips the oldest courses first, and leaves a roof that looks fine from the street.
1 hail report, the largest 1.5 inches across - about the size of a ping-pong ball. That is past the bruising range. Hail of that size splits the mat under the granules, and a split mat lets water into the shingle itself.
Also on the record: 1 confirmed tornado touched down inside the same circle and the National Weather Service logged 30 winter-storm, heavy-snow or ice-storm events for New London County over the same years.
If your roof went through any of those, get eyes on it before the next one. The inspection is free in Groton, the photographs are yours, and the storm damage report gathers what an insurer will ask for.
Source: NOAA NCEI Storm Events Database, reports within 10 miles of the center of Groton, 2015-2026.
Permits and inspections in Groton
Groton issues roofing permits through its building department. That office is headed by Timothy Brennan. The office is staffed full-time, so inspections here are generally easy to schedule. The published number is 860-446-5982. Written questions go to tbrennan@groton-ct.gov. We pull the permit as part of the job. No homeowner should be asked to pull their own roofing permit by a contractor working on their house.
A roof replacement permit in Connecticut is generally issued over the counter or online once the scope is submitted, with an inspection at completion. Where a house sits in a local historic district, or where zoning or health review applies, that approval comes first and can add real time. If your property is affected, we will tell you before the contract is signed rather than after the dumpster arrives.
Who owns Groton's roofs
Groton is close to an even split between owners and renters. The Census estimates count 51.9 percent of occupied homes as owner-occupied and 48.1 percent as rented, where Connecticut runs 66.2 to 33.8 and the Southeastern Connecticut Planning Region 65.4 to 34.6. The buildings follow the same pattern. Single-family detached houses are 48.2 percent of Groton's units, below the state's 58.7, and buildings of five or more units are 24.5 percent, against 18.4 percent statewide.
That changes how roof problems surface. In a rented house or an apartment building, the person who sees the ceiling stain is often not the person who pays for the roof, and a small leak can run for a while before it reaches someone who can fix it. Caught early, many of those stay repairs, and Connecticut's amended R105.2 exempts repairs limited to 25 percent of the roof covering within one calendar year from permits. For a landlord, a clear line between a repair and a replacement is useful when budgeting across several buildings.
Larger buildings add a second variable. Where an apartment or condominium building has a membrane roof rather than shingles, InterNACHI's life expectancy chart gives membranes shorter lives than architectural shingles: 15 to 25 years for EPDM rubber and 7 to 20 for TPO, against 30 for architectural asphalt. An owner planning around those numbers is on a different calendar from a household with a shingle roof, and the chart itself says local weather, design, material quality and maintenance shift every figure on it.
By age, Groton leans toward the 1960-1979 era. The estimates put 31.3 percent of homes in that bracket, compared with 26.7 percent statewide, and the median year built is 1973, about 53 years ago. Homes built before 1980 are 62.6 percent of the stock, and the pre-1978 part of it counts as target housing, with some exceptions, under EPA's Renovation, Repair and Painting rule, which covers paid work that disturbs painted surfaces there. Only 12.8 percent of Groton's housing dates from 2000 or later, so most roofs in town are likely on houses that have already been through at least one replacement or are due for one.
| Housing (ACS 2019–2023) | Groton | Connecticut |
|---|---|---|
| Housing units | 18,285 | 1,536,049 |
| Owner-occupied homes | 8,561 | 939,912 |
| Share owner-occupied | 51.9% | 66.2% |
| Single-family detached | 48.2% | 58.7% |
| Median year built | 1973 | 1967 |
| Built before 1940 | 15.1% | 20.4% |
| Built 1940–1979 | 47.6% | 47.4% |
| Built 1980–1999 | 24.6% | 20.5% |
| Built 2000 or later | 12.8% | 11.8% |
Source: U.S. Census Bureau, American Community Survey 2019–2023 5-year estimates, tables B25001, B25003, B25024, B25034, B25035. Estimates carry a margin of error, which is wider in smaller towns.
How Groton compares with the towns around it
Of the 4 towns Groton borders, 1 is rated for stronger wind, 3 for less, and 0 match. Design criteria change at town lines in Connecticut, and so does the building department.
| Bordering town | Design wind | vs. Groton | Ground snow | County |
|---|---|---|---|---|
| Ledyard | 126 mph | -2 | 30 psf | New London |
| New London | 127 mph | -1 | 30 psf | New London |
| Stonington | 129 mph | +1 | 30 psf | New London |
| Waterford | 127 mph | -1 | 30 psf | New London |
Get a straight answer on your roof
Free inspection, a written scope, and a 25-year workmanship warranty.
Common questions about roofing in Groton
What wind speed does a roof in Groton have to be designed for?
The 2022 Connecticut State Building Code assigns Groton an ultimate design wind speed of 128 mph. The residential and commercial code tables disagree for this town, so we confirm the governing figure with the building department in writing before material is ordered.
Who is the building official in Groton?
Timothy Brennan is the building official on record for Groton, per the State of Connecticut list of municipal building officials. Staffing changes — confirm with the town before relying on it.
How many nails per shingle should be used in Groton?
Connecticut's code minimum is four. Shingle manufacturers require six to keep their wind warranty in force, and six is what we install. Six nails is a manufacturer requirement, not a code requirement.
Do I need a permit to replace a roof in Groton?
Yes. A roof replacement in Groton requires a building permit, and we pull it as part of the job. The building department's published number is 860-446-5982 if you want to confirm anything independently.
Is ice barrier required on a Groton roof?
Yes — Connecticut requires it statewide under code section R905.1.2, running from the lowest roof edge to at least 24 inches inside the exterior wall line. With a 30 psf ground snow load in Groton, that detail is doing real work.
Have you worked in Groton before?
Yes. Our records show 1 completed roof in Groton. That count comes from our own job history.
Does Groton get hail?
Yes, and it is worth taking seriously. NOAA has 1 confirmed hail report within ten miles of Groton since 2015, the largest 1.5 inches across. Stones that size crack the mat under the granules rather than just bruising it, so the damage is real even when the roof looks sound from the driveway.
Are ice dams a problem in Groton?
They are the winter problem worth planning for. The nearest long-record station averages 24 inches of snow a year across about 8 days that leave an inch or more, and roughly 102 nights below freezing. That is the exact recipe for melt at the warm middle of a roof refreezing at the cold eave. Connecticut's code answer is an ice barrier at the eaves; the practical answer is that plus attic insulation and ventilation that keep the roof deck cold.
Design criteria are taken from Appendix AY of the 2022 Connecticut State Building Code. Building department details come from the State of Connecticut list of municipal building officials, updated 04-06-2026. Municipal staffing and personnel change — confirm current details with the town. Stallion Ridge Exteriors is a service-area business based in Bethel, Connecticut.