How do I temporarily block sun on windows?

Author: Prof. Neil D'Amore II  |  Last update: Saturday, July 19, 2025

Cardboard and Aluminium Foil Cut the cardboard to fit your window panes and cover it with aluminium foil to reflect sunlight. This method isn't as aesthetically pleasing as other solutions listed, but it is effective and easy to remove when no longer needed.

How do you block sunlight from windows cheaply?

If you are not a fan of cardboard or aluminum foil, there are pleated paper shades that are very cheap and just use tape for install. An example is here and here. These can usually be found at big box hardware stores and any other large home goods stores.

How to stop sunlight from coming through a window?

- Tinting: Use tinted glass or adhesive films that reduce visibility and light. Sealing Gaps: - Ensure that your window frames are properly sealed to prevent light from leaking through any gaps. External Options: - Awnings or Overhangs: Install awnings or overhangs to block direct light from entering the windows.

How to block sunlight heat from windows?

Solar shades or reflective window film are the best window coverings to block heat. Solar shades confine solar heat gain and block damaging UV rays while keeping a view of the outdoors. And the reflective window films reflect heat away from the windows so they cannot enter the interior.

How to block light from windows temporarily?

Here are a few popular methods to consider:
  1. Aluminum foil: A cost-effective and readily available option, aluminum foil can be used to cover windows and block out light. ...
  2. Blackout blinds or shades: These products are designed to effectively block light and offer a neat look.

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How to block out sunlight without curtains?

Here are some cost-effective methods to blackout your windows without breaking the bank.
  1. Blackout Window Film. ...
  2. Blackout Curtains or Blinds. ...
  3. Cardboard and Aluminium Foil. ...
  4. Blackout Roller Shades. ...
  5. Privacy Film. ...
  6. DIY Blackout Panels.

How to cover a window temporarily?

You can use tough garbage bags or any strong plastic that can handle a bit of roughness. Use duct tape or masking tape to cover and seal these gaps, preventing drafts and potential water infiltration. Additionally, consider reinforcing the covering by adding extra screws or nails along the edges.

What is the best heat blocking window covering?

Insulated cellular shades are typically considered to have the highest R-values of all window coverings. The air pockets in the honeycomb cross-sections act as insulators, increasing the R-value and reducing the conduction of heat through the window.

Does putting plastic on windows help in summer?

Solar heat absorption: The plastic film absorbs a significant amount of the sun's heat energy that would normally be reflected away by the glass. Heat trapping: The absorbed heat is then trapped inside the plastic layer, creating a warm microclimate between the plastic and the window glass.

How do you stop the sun from heating up your room?

Stave off the sweltering with our top tips to cool down your rooms – fast.
  1. 1: Close curtains and windows. ...
  2. 2: Improvise some air conditioning. ...
  3. 3: Keep your doors closed. ...
  4. 4: Fix reflective window film. ...
  5. 5: Use extractor fans cleverly. ...
  6. 6: Add some bamboo bedding. ...
  7. 7: Cool down your sofa. ...
  8. 8: Eat your meals outside.

How to blackout windows DIY?

You can easily and cheaply use tin foil or cardboard to black out your windows. Save a pretty penny by cutting either material to the size of your windows and taping it to the window. This is one of the easiest and most budget-friendly blackout solutions, but it definitely isn't the most aesthetically friendly.

What can I put on my windows to keep heat out?

What can you put on a window to keep heat out?
  1. Elevate your blinds and shades.
  2. Change your curtains.
  3. Add window films.
  4. Incorporate awnings and shutters.
  5. Replace with low-emissivity windows.

How to shade a window from the sun?

Draperies, Venetian blinds, vertical blinds, roll up shades, and a variety of other interior attachments are common additions to residential windows. They are used more for aesthetics and privacy than for solar heat gain prevention, but they can be effective heat blockers just the same.

How effective is bubble wrap on windows?

According to the HowToGoSolar, a free online resource geared toward educating homeowners on the benefits of solar power and energy efficiency, bubble wrapped windows show insulating improvements that are 50% better on single-glazed windows, cutting utility bills almost in half.

How to blackout windows with foil?

All you need is a roll of tin foil, a spray bottle filled with water, and a window. Just spray some water on the window, roll out the tin foil directly over the water, and voila!

Does blackout window film work?

Blackout window film will completely block out the visible light spectrum. It won't, however, solve your summer overheating issues. If you want to stop anyone from being able to see within your home – and don't want to look out onto your outdoor space – use blackout film, by all means.

Does putting Saran Wrap on windows help?

What's the point of using plastic wrap? Plastic wrap is a great solution to save money when you have drafty windows. Plastic does an excellent job of keeping the heat from escaping if it stays intact.

How to block heat from windows DIY?

  1. Heat Blocking Window Shades. Putting up window shades is a quick fix for solar overheating. ...
  2. Blockout Roller or Panel Blinds. ...
  3. External Window Shading. ...
  4. Bubble Wrap Window Insulation. ...
  5. Heat Reducing Window Film. ...
  6. Combining Multiple Methods.

Does bubble wrap on windows help in summer?

If you are in a pinch, bubble wrap is an excellent insulator for summer windows. Simply spray a light mist of water on your windows, and lay bubble wrap against them to act as another layer of glass. The bubble wrap will stick as long as you need, and it works to keep the hot out and the cold in.

Does aluminum foil on windows keep heat out?

Spreading tin foil on any windows that receive direct sunlight can redirect the sun and heat away from your home. While it may introduce a somewhat space-age aesthetic to your household, it's a cheap and temporary fix to the problem of extreme heat.

How can I reduce heat gain through my windows?

Large west, east and north-facing windows should be shaded for increased energy efficiency. External shading is much more effective at keeping your home cool than internal blinds or curtains, as it stops the heat reaching the glass, but using both external and internal window coverings will provide maximum protection.

What color blinds block the most heat?

What colour blinds keep the heat out most effectively in summer? White or another light-coloured blind is the lining shade you want in order to insulate against the sun in summer, and to lower the extent to which the room heats up and holds onto the heat.

How do you cover windows from sunlight?

You can choose your own preferred window covering, as well as the material and the colour. You can create a sleek interplay of lines by adding vertical blinds or Venetian blinds to your home, or why not go for a classic look with folded blinds.

How to block a window without curtains?

15 Ideas on How to Dress a Window Without Curtains
  1. 10 Window Cover Ideas. There are numerous ways to make your windows look attractive without traditional curtains. ...
  2. Privacy Screen. ...
  3. Frosted Glass. ...
  4. Hanging Plants. ...
  5. Stained Glass. ...
  6. Blinds. ...
  7. Shutters. ...
  8. Roman Shades.

How do I make windows opaque temporarily?

One of the easiest and most forgiving methods for DIY frosted glass involves decorative window film or adhesive vinyl shelf lining. Decorative window film adheres using static cling, so it is entirely removable and repositionable.

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