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Insulating Curtains and Blinds - Part Two

THE SCIENCE BEHIND INSULATING CURTAINS AND BLINDS


When it's cold outside the windows panes in our homes become cool to touch, and the air close to these window panes will be cooled. Cool air is denser (heavier) than warm air, so as this cooled air sinks, it is replaced by warmer air from other parts of the room. This creates a circulating air current which will cool the entire room. Window furnishings are designed to trap the air between the window and the curtain or blind, to prevent this circulating air current from forming.


Insulating curtains have been identified as one of the most effective ways of reducing heat loss through windows. What gives a curtain its insulating properties is its insulating lining, and its well-fitting design.


  • In the past thermal drapes, a single-layer fabric with an acrylic backing, have been the standard for insulated curtains. However, Lewis’s recommend Insulating Linings, which are sewn-in separate linings with a thermal coating. Air is trapped in the millions of tiny air pockets in the thermal coating, and in between the different layers of material.

  • An insulating curtain must be well-fitting in order to seal any gaps where air could escape. A well-fitting curtain must be fitted as close as possible to the window frame, be measured and fitted so that they touch the floor, and be a generous width so that they overlap the window frame and return back to the wall at each side.


Lewis’s also partner with Luxaflex to provide a range of attractive insulated blinds. Duette Blinds are very effective at trapping large amounts of air in their cellular structure. They are also available in block-out materials that have a reflective foil layer to reflect radiation. As a result, Luxaflex’s Duette Architella range in a block-out fabric offer 33% more insulation than double glazing.


Check out our Special Offers page, or pop in store to find out how our Special Insulation Offers can help make your home more comfortable and healthy to live in this winter.