Stalled home values, rising incomes and falling mortgage rates continue to deliver improvements in housing affordability in Canada, according to a report released Wednesday. And yet, National Bank of Canada estimates show the median household would need to double their annual earnings to qualify for a mortgage on a typical home across the country’s major urban markets. The Montreal-based bank said in its report that the third quarter of the year marked the third consecutive improvement in housing affordability. Anne Gaviola has more on housing affordability, rent inflation and a looming wave of mortgage arrears in this look at Canada’s housing market both present and future.