: Floor-length curtains provide the best insulation by creating a complete barrier. If using sill-length, ensure they overlap the sill by at least 15–20cm.
: 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
: Install the curtain rod 15–20cm above the window frame to cover the wall and prevent warm air from rising out through the top. 3. Recommended Online Retailers (2026) Thermal curtain buying guide - ManoMano : Floor-length curtains provide the best insulation by
: Can be retrofitted to existing curtains or bought as a "thermal-lined" set for maximum energy efficiency. Backings and Linings : : Install the curtain
: Common in ready-made curtains for reflecting heat.
: 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