Replacing single-glazed windows with new double-panes used to be the energy-wise solution. Now there’s a less expensive alternative.

 

WASTE NOT | When it comes to improving the energy efficiency of older buildings, one of the major things we tend to think of is replacing single-glazed windows with double-glazed models. A CMHC report on energy savings proves otherwise. In 2004, their case-study research found that replacing doors and windows averaged just 12 percent energy savings compared to 34 percent from insulating the foundation and ceiling plus draftproofing the rest of the house, 14 percent from insulating exterior walls and 39 percent from upgrading the furnace. Read more