By covering one side of window sized cardboard panels in reflective aluminum foil and placing them behind the window treatments next to the windows shiny side facing outdoors you can stop at least some heat from entering the home explains ready gov.
Putting foil on windows to keep heat out.
Aluminum is highly reflective which makes it effective in keeping out the radiant heat of the sun.
If needed use duct tape to join cardboard sheets or pieces together for large windows.
You will need to remove the foil before opening the windows.
You can use insulation like bubble wrap in between the window and aluminum to create a thicker barrier.
Add extra three inches to the total length for adjusting and fitting the aluminum sheet to the frame.
Putting aluminum foil on windows can keep heat out.
Health concerns about tin foil some people are worried that using tin foil or aluminum foil on their windows could cause serious hazards.
Up to 40 percent of undesired heat in a home comes in through the windows.
However while foil may keep out unwanted heat it is unsightly and essentially defeats the purpose of having a window to look outside.
Here s how to properly to do it.
By completely covering your windows with aluminum foil you will not only block the sun but the aluminum foil will reflect the sun and lower your cooling bills.