Half of the 4,625 homes in Granby were built before 1978. 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 whole new roof is more than that, so it goes to Granby’s building official.
Layers
A new roof may go over one existing layer; with two or more, or over slate, clay or cement tile, everything comes off to the deck (IRC R908.3.1.1). 54% of Granby’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
There is no local exception: the state table says “yes.” 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.
Wind and snow
Granby’s code design values are a 120 mph ultimate design wind speed and a 35 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. The state’s code edition and the rest of its rules: roof replacement in Connecticut.
Owners live in 4,105 of Granby’s occupied homes, or 92%. By year built, 10% before 1940, 25% before 1960, 54% before 1980; 13% went up in 2000 or later. (ACS 2020–2024.)
By building type: 82% detached houses, 9% attached single-family houses (rowhouses, twins and townhouses).
Of the 29 Hartford County municipalities on this site, Granby has the 22nd largest share of homes built before 1980: 54%, against a county range of 48% to 87%.
ZIP codes: 06035 · 06060 · 06090
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Granby | 1978 | 54% | 92% | 9% | 9 |
| East Granby | 1975 | 56% | 88% | 4% | 9 |
| Hartland | 1960 | 64% | 92% | 2% | 8 |
| Simsbury | 1973 | 65% | 75% | 4% | 9 |
| Barkhamsted | 1978 | 54% | 93% | 1% | 10 |
| Suffield | 1979 | 51% | 87% | 5% | 12 |
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.
Within 10 miles of Granby, hail of an inch or more was reported on 9 days between 2006 and 2025, the biggest stones 2.5 in on May 15, 2018. The most recent was August 26, 2024.
Tropical Storm Isaias (DR-4580, January 2021) is the latest of 6 federal storm declarations covering Hartford County since 2006. (OpenFEMA.)
A report says hail fell near Granby, not that it damaged a roof. When wind or hail damage means a new roof.
Useful life is HUD’s planning figure, not a warranty. 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; 82% of homes here are detached | Class G or H at 120 mph design wind (IRC Table R905.2.4.1) |
| Metal (standing seam, panels) | 50 years | Simple roofs with long, unbroken slopes | Standing seam that carries its own loads can skip the tear-off (R908.3.1) |
| Slate | 75 years | Older houses; 10% 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 | Seams at walls and drainage |
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 Granby.
The price side is in what a new roof costs in Connecticut; the paperwork side in checking a roofing contractor.
The 25 percent line. A whole new roof is more than that, so it goes to Granby’s building official.
A new roof may go over one existing layer; with two or more, or over slate, clay or cement tile, everything comes off to the deck (IRC R908.3.1.1). 54% of Granby’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 Granby was built in 1978, 54% of homes were built before 1980, 92% are owner-occupied.
Hail of 1 inch or larger was reported on 9 days within 10 miles of Granby 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 Granby.
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.