Do Curtains Make It Hotter

If the outside air temperature is lower than that inside, and the room is warmed by some source of heat, then yes, any close fitting curtains of any colour will enable the room to become a little warmer; among other effects by blocking cold convective down-draughts from the window glass.

Is it warmer with curtains open or closed?

In hot weather, stay inside the coolest rooms in your house as much as possible. … close pale-coloured curtains – closing dark curtains and metal blinds can make rooms hotter. keep windows closed when it’s hotter outside than inside, but open them if the room gets too hot.

What kind of curtains keep cold out?

Thermal curtains feature a layer of acrylic foam between the double or triple layers of fabric to provide insulation, making these curtains ideal for winter months or drafty windows. Thermal curtains can also dampen sound, block out sunlight, and reduce energy bills.