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Aluminum foil, or tin foil as it is often called, is primarily intended to provide heat-proof, air-tight, safe coverage for food. ... Aluminum foil on windows is most effective at keeping out heat and light when you place it shiny side out and cover its backside with a layer of something else, like insulation or cardboard.Apr 4, 2020

Yes. In baking, aluminum foil keeps the food unburnt from direct heat exposure in the oven. Following the same logic, aluminum foil on the window keeps the heat out because, well, it is heat resistant. As such, wrapping your windows with aluminum foil generally maintains the low temperature inside your home.

If you want to maximize your time and enjoyment on the patio or deck this summer, consider installing exterior shades. Made for outdoor living environments, exterior shades use woven solar screens to block UV light, glare and reduce heat gain while not blocking the view. It's like sunglasses for your patio!Apr 11, 2018

Curtain panels made of thicker, darker colored materials, such as black or navy thick cotton or polyester, will block out more of the sun than curtains made of thinner, lighter colored fabrics, such as a white or oatmeal linen. If you want to block out the sun completely, paneled blackout curtains are a great option.

You can position furniture like bookshelves and bureaus to block light. There are also alternatives to curtains like blinds, a window film, aluminum foil, and roller shades. Depending on how your bed is positioned in front of a window, you can stack your pillows to keep light out at the bottom.Dec 31, 2019

Put simply, yes it does. Cardboard has air pockets between two layers and this slows down the transfer of heat from one side to the other, and any warm air that gets into the air pocket can stay between these layers for a long period of time and maintain its temperature.Feb 22, 2021

Use masking or duct tape to attach the foil to the edges of the window. The tape should overlap at the corners. The goal is to eliminate any open spaces around the sides of each foil piece, creating a secure border around the window. Cover each seam with masking tape.

Aluminum is resistant to heat, so it stops heat from the sun. People usually cover the inside of the window with foil using tapes. Since there's no direct sunlight coming in, the temperature inside the house stays lower than outside.

• What Can I Put Over My Windows to Help Keep the Sun out? 1 Sheets or Blankets. One of the cheapest and easiest ways to cover windows to block out the sun is to use blankets or sheets you already have on hand. 2 Blackout Curtains. ... 3 Aluminum Foil. ... 4 Shutters and Awnings. ...