Buffalo Attic Insulation by the Numbers

Last reviewed 2026-07-25. Journalists, researchers, and community groups are welcome to cite any figure on this page with attribution and a link.

Every figure on this page is copied from a published source and linked back to the page that carries it. Nothing here is estimated, rounded to feel better, or recalled from memory. The subject is deliberately narrow: what New York's energy code requires of a ceiling in Erie and Niagara Counties, what the National Weather Service has actually measured falling on roofs in this metro, and what the state currently pays toward insulation and air sealing work on an existing house.

Three things make Western New York a distinct market for this work rather than a generic cold-climate one. The Department of Energy assigns both counties to IECC Climate Zone 5A. Lake Erie produces snowfall that varies by more than an order of magnitude across a twenty-mile line, which the 2014 and 2022 event totals below make plain. And New York runs two separate incentive programs, one income-tested and one not, that a homeowner here can weigh against the same job. The numbers, and where each one comes from, follow.

What does New York's energy code require in Erie and Niagara Counties?

Two federal and state documents settle what applies here. The Department of Energy's Guide to Determining Climate Regions by County assigns Erie County and Niagara County to IECC Climate Zone 5A and to the Building America cold region, the same designation covering most of the Great Lakes interior. Sitting on the lake does not shift Buffalo into a milder zone. Lake Erie moderates temperature swings on either side of the season, but the heating period is long and the design conditions are cold.

The 2020 Energy Conservation Construction Code of New York State then sets prescriptive envelope values by zone. The Climate Zone 5 row is reproduced below as published, including both the prescriptive R-value option and the maximum assembly U-factor that may be used in its place. These are minimums for new work and for alterations that trigger compliance, not aspirational recommendations. A homeowner topping up an existing attic is generally not held to new-construction compliance, but the ceiling figure is still the sensible target, because it is the level the state considers adequate for a house built here today.

How much snow has actually fallen on roofs in this metro?

Lake-effect snow is not distributed like ordinary synoptic snowfall. A band forms over open water, comes ashore on a narrow track, and stays put while the wind direction holds. The National Weather Service in Buffalo published community totals for the event of November 17 to 19, 2014, and the table below reproduces them alongside the reading at Buffalo Niagara International Airport, the region's official climate station. The airport number is not an error. It is what fell at that point while a band sat over the Southtowns.

The impacts were not marginal. The National Weather Service attributes 13 deaths to that event, along with hundreds of major roof collapses and structural failures, thousands of stranded motorists, and food and fuel shortages across the affected communities. Combined with the event that moved through earlier the same month, totals in the worst-hit communities peaked near seven feet of snow inside a two-week window.

Was 2014 an outlier, or is that normal for Buffalo?

It was severe, not unique. The Northeast Regional Climate Center at Cornell University reported that the November 16 to 20, 2022 lake-effect event produced 81.2 inches at a cooperative observing site west of Hamburg, 80.0 inches at Orchard Park and 76.0 inches near Blasdell, with numerous sites clearing three feet. Two events eight years apart put comparable loads on roofs in the same corridor south of the city, which is the part of the record that matters when deciding how much attention an attic deserves.

Season totals show the same volatility on a longer timescale. The National Weather Service's Buffalo snowfall record lists 199.4 inches in 1976-77 as the snowiest season and 36.7 inches in 2011-12 as the least snowy, a spread of better than five to one between the extremes at a single gauge. A house here is not being designed for an average winter. It is being asked to handle both ends of that range, which is an argument for building the envelope to the higher standard rather than the minimum.

What will New York pay toward insulation and air sealing?

NYSERDA runs two routes at the household level. Comfort Home is open without an income test and pays flat amounts: $2,500 for the Good package, which seals air leaks and insulates the attic and rim joist, $3,000 for the Better package, which adds wall and floor insulation, and $2,000 for an ENERGY STAR windows add-on completed after the air sealing and insulation work. NYSERDA reports average savings near 14% on heating and cooling costs for Good, 20% for Better and roughly 8% for the windows measure.

EmPower+ is income-tested and considerably larger. Income-eligible households can receive covered improvements at no cost up to $12,000 per project upstate, while a moderate-income tier pays 50% of project cost up to $6,000 upstate. Federal Home Electrification and Appliance Rebate funding delivered through the same program carries measure-level sublimits, of which the relevant one here is $1,600 for air sealing, insulation and ventilation. The figures below are the published caps; eligibility is determined by NYSERDA, not by the contractor doing the work.

How old is the housing all of this has to work on?

Place-level year-built detail is not carried in the Census Bureau's QuickFacts tables, so the honest regional figure comes from the state. New York's 2021-2025 Consolidated Plan, in its housing market overview, states that upstate New York has a significant inventory of housing built prior to 1980, with 40% built prior to 1950. That is a statewide upstate figure rather than an Erie County one, and it is reported here as such. It still frames the problem: a large share of the ceilings being insulated in this market were framed before anyone was thinking about R-values.

The four communities below show how much the same job varies within one metro. Census QuickFacts figures for owner-occupancy and median value differ by a factor of more than two and a half between Lackawanna and East Aurora, which matters because the income-tested route into NYSERDA funding is available in some of these places far more often than others. The census population is the April 1, 2020 count; the housing and income figures are 2020-2024 American Community Survey estimates as published in QuickFacts.

Sources & Methodology

Every figure above was taken from the primary sources below (accessed 2026-07-25). Where a number is derived (arithmetic on published figures) or covers a broader period or area, the text says so.

1. NYS Energy Code Zone 5 requirements (Insulation Institute) — Prescriptive R-values and maximum U-factors for Climate Zone 5 under the 2020 Energy Conservation Construction Code of New York State.
2. ENERGY STAR recommended home insulation R-values — Recommended attic, floor and basement wall insulation levels by climate zone, drawn from the 2021 IECC residential provisions.
3. U.S. Department of Energy, Guide to Determining Climate Regions by County — County-level IECC climate zone and Building America region assignments, including Erie and Niagara Counties in New York.
4. NWS Buffalo, November 17-19, 2014 lake effect snow event — Community storm totals, the Buffalo airport reading, and the fatality and roof collapse impacts reported for that event.
5. NWS Buffalo, monthly and seasonal snowfall record — Seasonal snowfall totals for Buffalo, including the snowiest season on record and the least snowy season on record.
6. Northeast Regional Climate Center, Cornell University — Storm totals for the November 16-20, 2022 western New York lake-effect event, including the Hamburg, Orchard Park and Blasdell readings.
7. NYSERDA EmPower+ — Low-income and moderate-income project caps for upstate New York and the federal HEAR sublimit for air sealing, insulation and ventilation.
8. NYSERDA Comfort Home Program — Flat incentive amounts for the Good and Better packages, the ENERGY STAR windows add-on, and the average bill savings NYSERDA reports.
9. New York State 2021-2025 Consolidated Plan — Housing market overview statement that 40% of upstate New York housing was built prior to 1950.
10. U.S. Census Bureau QuickFacts, Lackawanna city, New York — Population, owner-occupancy rate, median home value and median household income for Lackawanna.
11. U.S. Census Bureau QuickFacts, North Tonawanda city, New York — Population, owner-occupancy rate and median home value for North Tonawanda in Niagara County.
12. U.S. Census Bureau QuickFacts, West Seneca town, Erie County, New York — Population, owner-occupancy rate and median home value for the town of West Seneca.
13. U.S. Census Bureau QuickFacts, East Aurora village, New York — Population, owner-occupancy rate and median home value for the village of East Aurora.