Table 4.5b – Windows By Construction Year


 Number of households by year of construction
Before 1946 1946-1960 1961-1977 1978-1983 1984-1995 1996-2000 2001-2010 2011 or later Not stated
Number of windows in dwelling
No windows - U - U - U - U - U - U - U - U - U
1 to 5 windows 130,509 M 311,303 M 842,981 A 446,345 A 401,692 A 118,577 M 224,343 A 268,554 A 175,510 M
6 to 10 windows 445,274 A 540,933 A 1,090,954 A 461,072 A 697,217 A 255,886 A 591,831 A 296,449 A 75,192 M
11 to 15 windows 508,100 A 518,828 A 914,020 A 396,282 A 558,021 A 214,736 A 528,884 A 224,416 A - U
16 to 20 windows 216,430 A 189,074 M 274,090 A 100,447 M 301,800 A 139,016 M 308,011 A 172,355 M - U
21 to 25 windows 86,371 M 50,333 M 84,923 M - U 173,195 M - U 130,020 M 89,308 M - U
26 to 30 windows 35,278 M - U - U - U 47,927 M - U 40,017 M - U - U
30 windows or more - U - U - U - U 40,932 M - U - U - U - U
Don’t know - U - U - U - U - U - U - U - U - U
Not stated - U - U 94,532 M - U - U - U - U - U - U
Type of windows that are the majority in the dwelling
Standard single pane with a storm window 206,415 M 140,231 M 232,894 M 127,357 M 104,016 M - U - U - U - U
Standard single pane 126,705 M 186,172 M 253,768 A 155,491 M 141,686 M - U 158,263 M 106,499 M 55,502 U
Standard double pane 877,809 A 983,200 A 2,139,586 A 928,328 A 1,453,203 A 544,594 A 1,153,153 A 663,505 A 144,508 M
Standard double pane sealed unit - U 120,614 M 295,766 A 125,324 A 231,897 A 94,121 M 162,641 M 146,064 A - U
Standard triple pane sealed unit - U - U 78,329 M - U 52,683 M - U - U - U - -
Valid skip Footnote 1 - - - U - U - U - U - - - - - U - U
Don’t know 87,643 M 155,488 M 249,934 A 137,492 M 212,302 M 77,451 M 199,275 M 161,864 M - U
Not stated 53,000 M 130,249 M 170,906 A 48,725 M 108,734 M - U 75,597 M - U - U
Age of the majority of the windows
5 years or less 163,624 M 194,598 A 491,113 M 253,054 M 323,695 A 86,413 M 61,476 M 396,897 A - U
6 to 10 years 112,958 M 196,389 M 356,736 M 94,372 M 145,841 M - U 140,696 M 292,316 A - U
11 to 15 years 133,913 M 191,531 M 272,908 A 81,649 M 100,663 M - U 555,962 A - U - U
16 or more 420,795 A 397,460 A 751,619 A 463,563 A 885,994 A 465,588 A 282,767 A - U - U
Valid skip Footnote 1 - - - U - U - U - U - - - - - U - U
Don’t know 198,560 M 279,112 A 486,823 A 231,832 A 247,542 A 87,033 M - U - U 212,178 M
Not stated 465,199 A 494,168 A 1,061,982 A 418,219 A 600,787 A 158,571 A 832,827 A 407,096 A - U
Frequency of use of blinds or curtains against solar heat
Daily 773,379 A 968,627 A 1,697,894 A 787,054 A 1,234,238 A 452,469 A 1,089,636 A 634,482 A 201,947 M
Weekly - U - U 83,118 M 62,520 M 80,585 M - U - U - U - U
Occasionaly 234,511 A 237,939 A 576,139 A 293,708 A 417,992 A 179,258 M 339,069 A 213,148 M - U
Valid skip Footnote 2 340,671 A 395,775 A 933,789 A 359,381 A 441,514 A 181,588 A 404,806 A 249,126 A - U
Don’t know - U - U - U - U - U - U - U - U - U
Not stated - U - U 122,075 M - U 110,317 M - U 53,503 M 60,311 M - U

Legend:

The letter beside each estimate classifies its quality as follows: A–Acceptable, M–Use with caution, U–Too unreliable to be published.

Notes:

Due to rounding, the numbers may not add up and may differ slightly among tables.

Source:

2019 Survey of Household Energy Use