Why Window Treatments Matter in Winter Up to 30% of a home's heating energy is lost through windows. In a country where winter lasts 5–6 months, the right window treatments are not just decoration — they are insulation. 1. Cellular Shades — Best Overall Cellular shades trap air in honeycomb pockets, reducing heat loss by up to 40%. Double-cell shades provide even more insulation. 2. Insulated Drapery Heavy, lined drapes create a thick barrier against cold drafts, reducing heat loss by 25%. 3. Roman Shades with Thermal Lining Roman shades with thermal backing provide excellent insulation while adding elegance. 4. Layered Treatments Combining cellular shades with drapery panels is the most effective approach — common in Scandinavian design and perfect for Canadian climates. 5. Motorized Schedules Motorized shades programmed to close at sunset and open at sunrise can save 10–15% on heating bills. Book a free energy consultation →