Curtains don’t just finish a room. They play a key role in keeping your home warm, comfortable and energy efficient. With the right fabric, fit and installation, you can reduce heat loss and keep power bills down without major upgrades or structural changes.

Dan Moir from James Dunlop Textiles has helped countless homeowners select window treatments that not only look good but also work hard. He says the right curtain setup can be one of the simplest, most effective ways to boost insulation and comfort in your home.

Here are some smart ways to make your curtains work harder this winter.

1. Go full height

Curtains that run from ceiling to floor help trap a pocket of air between the glass and the fabric. This barrier slows the flow of cold air into the room and stops warm air from escaping too quickly. The taller the curtain, the more effective the insulation.

2. Cover wall to wall

Heat often escapes through gaps at the sides of a curtain, especially on wider windows or sliding doors. Installing curtains that stretch across the full width of the wall helps reduce draughts and cold air seepage. For best results, mount tracks slightly beyond the edge of the window frame.

3. Layer up for flexibility

Using two layers, a sheer curtain for daytime privacy and a heavier blockout for night, gives you more control over insulation throughout the day. In winter, you can close the blockout layer early to trap heat as the sun sets, while still enjoying filtered light during the day.

4. Choose lined fabrics

Curtains with an added lining provide extra insulation without changing the appearance of the fabric. The lining creates a second layer of protection that helps block cold air and retain warmth. Thermal linings are especially effective in bedrooms, living rooms and spaces with large windows.

5. Pick fabrics that can handle the sun

Even in winter, strong sunlight can damage curtain fabrics and reduce their performance over time. UV-rated fabrics are designed to resist fading and fibre breakdown, especially in homes with high sun exposure. Choosing the right fabric now means better insulation and less replacement later.

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Disclaimer: This article is based on a podcast featuring insights from experienced professionals and is intended for general information and inspiration only. While we aim to share valuable guidance, please seek personalised advice from qualified professionals before making decisions about your property, finances, or renovation plans.