What are thermal curtains? Thermal curtains are thick curtains with multiple layers of fabric and a layer of foam to help block the flow of heat. This helps you save energy, while also having sound dampening effects.
Thermal curtains work similarly to blackout curtains. But since their intended purposes are slightly different, a thermal curtain might have some shortcomings as a blackout curtain, and vice versa. If you want a curtain to do both, make sure it actually states that it does both. Otherwise, I recommend getting dark-colored thermal curtains. A blackout curtain may not block as much heat as you would like. Similarly, a light-colored thermal curtain might let in more light than you like.
Read more