4.3 - ATTIC
  Number of households by region
Canada Atlantic Quebec Ontario
Dwelling has an attic
Yes 7,315,829 A 588,703 A 1,387,161 A 3,133,375 A
No 1,365,686 A 85,794 A 437,101 A 397,503 A
Don't know 266,271 M U U U
Not stated 353,779 A U 157,421 M 96,846 M
Dwelling has an insulated attic
Yes - on the attic floor 5,243,822 A 442,507 A 1,034,347 A 2,205,987 A
Yes - on the attic walls 171,687 M U U 91,261 M
Yes - on both the attic floor and walls 872,398 A 70,069 A 107,580 M 390,949 A
No 147,235 M U U U
Don't know 682,954 A U 73,203 M 314,740 A
Not stated 817,784 A 40,612 M 208,373 M 252,963 M

Note:

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

Legend:

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

Source:

2011 Survey of Household Energy Use