Lyme has 1,197 homes, and half of them were standing by 1967. The rules below decide how much of the old roof has to come off and what goes under the new one.
New Roofing Costs connects homeowners with independent local roofing contractors. We do not perform roofing work.
This number connects homeowners who are planning a new roof or a full roof replacement with independent local roofing contractors. It is not for leak repairs or patch jobs. The call must come from the homeowner who decides on the roof. Calls may be recorded.
Permit
Without a permit, Connecticut allows only:
Repairs that are limited to 25 percent of roof covering and building siding within one calendar year.
2022 CSBC, (Amd) R105.2, item 11
A full replacement in Lyme is past that line; the town building official issues the permit.
Layers
On a roof that already carries two layers, or slate or tile, the code allows no recover: it is a tear-off (IRC R908.3.1.1). 62% of Lyme’s homes were built before 1980, so count the layers before comparing quotes.
Source: IRC 2021, Chapter 9 (Pennsylvania edition, UpCodes); 2022 Connecticut State Building Code
Ice barrier
Connecticut answers “yes” to the ice barrier for every town. Membrane or doubled underlayment, eave to 24 inches inside the wall line (IRC R905.1.2), is a line on every quote here.
Source: 2022 Connecticut State Building Code; IRC 2021, Chapter 9 (Pennsylvania edition, UpCodes)
Deck joints
Connecticut adds a 4-inch self-adhering strip over all joints of a plywood or OSB deck ((Amd) R905.1.1). It is not needed under a fully adhered membrane, or on board decks under 3 feet wide, which matters in a town where 31% of homes predate 1940.
Wind and snow
Lyme’s code design values are a 125 mph ultimate design wind speed and a 30 psf ground snow load; it is in Connecticut’s hurricane-prone region. At that wind speed the code calls for asphalt shingles labeled ASTM D7158 Class G or H (Table R905.2.4.1).
Source: 2022 Connecticut State Building Code; IRC 2021, Chapter 9 (Pennsylvania edition, UpCodes) (2022 CSBC, Appendix AY)
Rules as read on October 24, 2026. Everything else the state requires: roof replacement in Connecticut.
91% of the occupied homes in Lyme are lived in by their owners: 906 households, the people this line is for. By year built, 31% before 1940, 46% before 1960, 62% before 1980; 10% went up in 2000 or later. (ACS 2020–2024.)
By building type: 99% detached houses.
On a house built before 1940, ask what the deck is (boards or plywood) and whether slate sits under the later layers: slate can’t be roofed over, and Connecticut’s joint-tape rule does not apply to narrow board decks.
Of the 21 New London County municipalities on this site, Lyme has the 10th largest share of homes built before 1980: 62%, against a county range of 31% to 83%.
ZIP codes: 06371 · 06439
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Lyme | 1967 | 62% | 91% | 0% | 4 |
| Essex | 1971 | 65% | 78% | 3% | 4 |
| East Lyme | 1975 | 57% | 76% | 5% | 6 |
| Old Lyme | 1965 | 71% | 89% | 1% | 3 |
| East Haddam | 1976 | 54% | 89% | 3% | 7 |
| Salem | 1988 | 31% | 87% | 3% | 8 |
Median built: median year the homes were built. Before 1980: share of homes built then. Owners: share of homes that are owner-occupied. Row, twin: share of homes that are rowhouses, twins or townhouses. Census ACS 2020–2024. Hail days: days with hail of 1 inch or larger within 10 miles, 2006–2025, NOAA Storm Prediction Center.
Since 2006 the National Weather Service has logged hail of 1 inch or larger on 4 separate days within 10 miles of Lyme; the largest was 1.75 in on June 29, 2020. The most recent was August 22, 2020.
That is fewer than most places in the state on this site (median 9 days).
Federal major-disaster declarations for storms in New London County since 2006: 10, most recently DR-4629, Remnants of Hurricane Ida, declared October 2021. (OpenFEMA.)
A report says hail fell near Lyme, not that it damaged a roof. When wind or hail damage means a new roof.
HUD’s useful-life figures are for planning; a warranty is a separate promise. For Lyme’s houses: More in the guides to shingles, metal, slate and flat roofs.
| Material | HUD useful life | Fits a house like | Watch for |
|---|---|---|---|
| Asphalt shingles | 20 years | Most pitched roofs; 99% of homes here are detached | Class G or H at 125 mph design wind (IRC Table R905.2.4.1) |
| Metal (standing seam, panels) | 50 years | Low pitches and long runs | Standing seam that carries its own loads can skip the tear-off (R908.3.1) |
| Slate | 75 years | Older houses; 31% here predate 1940 | Can’t be roofed over; check the framing for the weight |
| Flat roof: EPDM or TPO | 15 years | Porches, additions, low-slope rears | Coating is not a replacement |
Connecticut registers home improvement contractors and their salespeople with the Department of Consumer Protection (C.G.S. § 20-420); 24,065 contractor registrations were active in October 2026. Ask for the number of anyone pricing a roof in Lyme.
The price side is in what a new roof costs in Connecticut; the paperwork side in checking a roofing contractor.
Needed beyond a quarter of the roof. A full replacement in Lyme is past that line; the town building official issues the permit.
On a roof that already carries two layers, or slate or tile, the code allows no recover: it is a tear-off (IRC R908.3.1.1). 62% of Lyme’s homes were built before 1980, so count the layers before comparing quotes.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Lyme was built in 1967, 62% of homes were built before 1980, 91% are owner-occupied.
Hail of 1 inch or larger was reported on 4 days within 10 miles of Lyme from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
Connecticut registers home improvement contractors and their salespeople with the Department of Consumer Protection (C.G.S. § 20-420); 24,065 contractor registrations were active in October 2026. Ask for the number of anyone pricing a roof in Lyme.
The full list: before you call.
Checked October 24, 2026. Laws and code editions change; the date says when these were last read at the source.