US Window and Glazing Statistics & Data to Know in 2026

About 33.1% of US homes had predominantly single-pane windows in 2024, calculated from the US Energy Information Administration's preliminary housing data. That is 43.83 million homes out of 132.54 million occupied primary homes. Double-pane glazing was the main type in 86.08 million homes, and triple-pane glazing in 2.63 million.

Those figures count homes, not individual windows. They describe the main glazing without counting storm windows. A home in the single-pane category may already have an added storm panel.

This 2026 reference brings together the latest published residential window characteristics, including glazing, frame materials, window counts, housing age and ownership. The underlying survey year stays beside each figure so a historical stock estimate does not become a claim about installations completed this year.

Calculations from public housing data

This reference calculates selected shares from EIA's published 2024 household totals. The single-pane share divides 43.83 million by 132.54 million and multiplies by 100. Each calculation uses its matching household population and rounds to one decimal place. EIA collected the underlying data; these are calculations from public totals.

Key US Window Statistics at a Glance

• 43.83 million homes had predominantly single-pane glazing in 2024, excluding storm windows, according to EIA Table HC2.1.
• 86.08 million homes had predominantly double-pane glazing in 2024, according to EIA Table HC2.1.
• 2.63 million homes had predominantly triple-pane glazing in 2024, according to EIA Table HC2.1.
• 48.15 million homes mainly had metal or aluminum window frames in 2024, according to EIA Table HC2.1.
• 43.62 million homes mainly had wood window frames in 2024, according to EIA Table HC2.1.
• 34.58 million homes mainly had vinyl window frames in 2024, according to EIA Table HC2.1.
• 41.42 million homes had 10 to 15 windows in 2024, the largest published window-count band in EIA Table HC2.1.
• 20.25 million occupied homes were built before 1950, according to EIA's 2024 construction-age table.

How many US homes are included in the window data?

132.54 million occupied primary homes are represented in the preliminary 2024 estimates from EIA's Residential Energy Consumption Survey.

The population covers the 50 states and Washington, DC. It excludes vacant homes, seasonal homes, second homes, military housing and group quarters. A number drawn from this survey should not be described as a count of every residential building.

An apartment is a housing unit in this dataset. A building containing several apartments can contribute several units, even when those apartments share an owner or an exterior wall. The housing-unit denominator is useful for household characteristics; it is different from a count of structures.

EIA released these preliminary structural characteristics in March 2026. The figures describe the 2024 housing stock, with survey collection in late 2024 and early 2025. Current-year framing does not change that reporting period.

What percentage of homes have single-, double- or triple-pane windows?

About 33.1% had predominantly single-pane glazing, 64.9% double-pane and 2.0% triple-pane in 2024, calculated from the rounded household totals in EIA Table HC2.1.

Small differences from calculations using underlying microdata can follow from the table's rounding.

The 2024 RECS questionnaire asks respondents to identify the glass in most of their windows and tells them not to count storm windows. That distinction changes how the results should be used.

A home can contain a mix of glazing types. The single-pane category does not mean every opening has single glass, and the double-pane category does not establish a particular coating, gas fill or performance rating. The table is a description of the installed stock, rather than a product specification.

For a household deciding on an upgrade, inspect the actual openings. Our storm-window energy savings guide explains why the existing window and the added panel both matter when reading performance evidence.

Which window frame materials are most common?

Metal or aluminum was the main frame material in 48.15 million homes in 2024, followed by wood in 43.62 million and vinyl in 34.58 million, according to EIA Table HC2.1.

Every row comes from EIA's preliminary 2024 frame-material estimates. The questionnaire asks about the material used for most windows in the home.

These are installed household categories, not the market share of windows sold in 2024. A frame installed years earlier still contributes to the current stock. A growing shipment category can take time to become common across existing homes.

Frame material does not tell you whether a sash operates properly, whether a frame has deteriorated, or which mounting details a supplemental panel will need. Those questions require an opening-level inspection.

How many windows does a typical home have?

10 to 15 windows was the most common published count band, covering 41.42 million homes in 2024, according to EIA Table HC2.1.

The counts and bands are from EIA's 2024 window table. The largest band is not an average number of windows.

An exact national mean cannot be recovered from these categories alone. Each band covers several possible counts, and the last category has no published upper limit. Assigning a midpoint to every band would introduce assumptions rather than reproduce an EIA result.

For a project budget, count and measure each opening instead of using a national category. Windows in the same home can differ in dimensions, operation and mounting conditions. A survey band cannot replace a room-by-room schedule.

How does single-pane glazing vary by housing type?

21.41 million detached single-family homes had predominantly single-pane glazing in 2024, according to EIA Table HC2.1.

The same table reports 3.06 million attached single-family homes, 4.68 million apartments in buildings with two to four units, 11.15 million apartments in buildings with five or more units, and 3.52 million mobile homes in the single-pane category. These are counts within each housing type.

A larger count does not establish a higher prevalence. Detached houses make up a larger part of the housing stock than several other categories. Comparing prevalence requires dividing each single-pane count by the matching housing-type total.

For apartment owners, the unit-level statistics describe an opportunity to inspect existing windows. They do not establish that a whole building has identical openings, that every unit needs work, or that a particular attachment fits every window.

Are single-pane windows more common in rental homes?

About 48.0% of renter-occupied homes had predominantly single-pane glazing, compared with 25.9% of owner-occupied homes, calculated from EIA's 2024 tenure table.

The calculation uses 20.62 million renter-occupied single-pane homes out of 43.00 million rental homes, and 23.21 million owner-occupied single-pane homes out of 89.54 million owner-occupied homes. Each share uses its own tenure denominator.

These are housing characteristics, not findings about landlord spending, tenant income or the cause of a household's energy costs. They do not show who would receive the savings from a particular project.

A property team can use the difference to frame an inspection program, then check the condition, tenancy arrangements and approval requirements at each property. National prevalence is a starting point for asking questions, rather than a prescription to replace or retrofit every opening.

How common are single-pane windows in older homes?

8.76 million occupied homes built before 1950 had predominantly single-pane glazing in 2024, according to EIA Table HC2.3.

Dividing that figure by the table's 20.25 million occupied pre-1950 homes gives an estimated 43.3%, calculated from rounded EIA totals. The same source places 6.58 million predominantly single-pane homes in the 1970s construction category.

Construction year describes the home, not the installation date of its current windows. An older building may have replacement windows, and a newer building may have openings with different performance. These figures cannot date a specific sash or prove that original glass remains.

For older homes, the comparison of storm windows and replacement separates retaining a sound existing window from replacing one that is damaged or no longer operates safely.

How many households report frequent drafts?

11.49 million homes were reported as too drafty most of the time, and 6.75 million all of the time, in EIA's preliminary 2024 structural table.

This is a household-reported condition. It is not a blower-door measurement or a finding that windows caused every draft. The table cannot assign leakage to a particular component of the building.

Keep those measures separate in research and purchasing decisions. A glazing category describes the main glass type; a draftiness response describes an occupant's experience. Neither replaces checking the sash, frame, surrounding opening and the rest of the building.

Use national data to plan an opening-level assessment

The useful next step is to turn broad stock data into a record of your own windows. Note the main glazing, frame condition, operation and measurements before comparing options. Keep the original window and any storm panel distinct in that record.

Storm Windows USA offers made-to-measure storm windows for existing openings. Use the national figures for context, then choose a configuration from the actual condition and dimensions of each window.