: Can be retrofitted to existing curtains or bought as a "thermal-lined" set for maximum energy efficiency.
: Look for "triple-weave" labels, which indicate three layers of fabric woven together to create a dense thermal barrier. Backings and Linings : buy thermal curtains online
: Thermal curtains focus on trapping heat, while blackout curtains focus on light exclusion. For both benefits, search specifically for "thermal blackout" curtains. 2. How to Measure for Maximum Efficiency : Can be retrofitted to existing curtains or
: Aim for 1.5x to 3x the width of your window frame. This ensures rich pleats that "seal" the window edges. buy thermal curtains online