Does aluminium foil still reflect heat if covered?

Does aluminum foil help keep homes cooler? - YouTube

Why does aluminum foil reflect heat? - Quora

**Redneck Aluminum Foil Hack To Keep Cooler** Aluminum foil (often called tinfoil) is highly reflective, and when used on windows it can reflect a large portion of radiant heat, especially infrared (IR) radiation from sunlight. Here's how it works: Reflectivity: Aluminum foil reflects about 85% to 95% of radiant heat, depending on the thickness and whether the shiny or dull side is facing out. The shiny side reflects slightly more. Heat Gain Reduction: By reflecting this IR radiation back outside, it can significantly reduce heat buildup inside the room. UV and Visible Light: Foil also blocks visible light almost completely, so the room will be darker. Conduction: Foil doesn’t insulate against conductive heat (heat that travels through glass), so it’s most effective when paired with an air gap or when used as part of a layered system (like with cardboard). In practice, covering your windows with foil can keep rooms 10–15°F cooler during hot weather, depending on exposure and other factors like window size and outside temperature. #diyBuzz #reddingbuzz #buzzhacks

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