8 Cheap Ways To Block Heat From Windows

The summer season is always exciting since it comes with great things and fun activities you can do both at home and outdoors. However, as much as summer is great, it also comes with its drawdowns, such as too much heat. When you have so much heat, it becomes unbearable to stay in your home.

This is why finding a solution to deal with such conditions is always an excellent option to consider. So, what is the best and cheap way to block heat from windows? That’s a question that many people ask, and I plan on answering it here in this post. 

Besides using an air conditioner to keep your home cool, there are also many cheap ways that you can take advantage of to stay comfortable during the hot summer season. 

8 Best Ways to Block Heat from Windows and Stay Cool During the Summer

The good thing about these simple and cheap hacks that I’m going to share here is that they don’t need professional installation. What’s more, they won’t break your bank. Here are some great solutions to consider using to stay cool in your home.

1. Use Reflective Material to Cover Your Windows

One unique and cheap way to heat from windows is to consider using reflective material to cover the windows. This method helps with reflecting the heat away from your home.

You can use the shiny windshield sun covers that are usually used in cars. These shiny windshield sun covers are not only cheap and affordable but can also fit perfectly on your windows.

The best option is to cover your windows appropriately with sized sheets of tinfoil, which you can secure in place with transparent scotch tape. Using this method will help reflect heat away from your windows, thereby keeping you cool at home and providing you with the best experience.

2. Adjust Your Curtains in Your Preferred Direction

Another great way of blocking heat from windows is to adjust your curtains to the direction you want. It’s important to note that letting drapes sway away in the opposite direction will only add drama to your interiors. It helps to improve the vibe and mood of your room/home. What’s more, it acts as a unique layering trick to your window adornments.

Therefore, this leads to proper insulation, light blockage, and protection from sunlight. Additionally, if you’ve already installed roller shadings in your home, using this technique can help hide the shadings efficiently. This will make your shadings appear as if they are invisible.

Another benefit you need to know about using this technique is that it will give your home a new and updated look of freshness and help you stay cool more. The major benefit of this method is that you won’t have to break the bank to achieve this comfort and cooling experience. It’s not only efficient but also relatively cheap and affordable.

3. Check on Your Appliances

Most people use appliances in their homes, and I recommend a simple hack that can help you block heat from windows. During the day you can avoid using large appliances. The worst thing you can do on a hot day is to generate more heat indoors. Therefore, consider waiting till evening to use your clothes washer, dishwasher, dryer, and any other large appliances.

This is a proven hack that can help keep you cool during the hot summer season and prevent heat from coming to your windows. It also helps avoid the stress of using too much energy that may increase your electricity bill. Aside from insulating your walls and ceiling, you should also check the insulation in your attic space.

That means you need to evaluate your R-value, which is the insulation ability to reduce the heat transfer. The R-value rating should be appropriate for your area’s climate so that you can determine the type of insulation to install.

4. Change the AC Filter and Cover the Outdoor AC Unit in Shade

Changing the AC filter is often an overlooked solution. One crucial factor you need to know is that your AC unit uses approximately 5 to 10 percent more energy if the filter happens to be dirty or clogged. Therefore, it’s important to consider changing the filter on your AC unit before the beginning of the hot months.

Another solution is to cover an outdoor AC unit in the shade. Similar to the way you would like to sit under the shade while you’re outside during a hot sunny day is the way your AC unit should be treated. Another disadvantage is that the more your AC is exposed to heat, the hard it works. However, while covering your AC, ensure you give it a few clearance feet on all sides to avoid blocking the airflow.

5. Open Doors/Windows at Night and Hang White Towels Over Windows

Once the sun goes down during the summer, consider releasing any warm air that your home has accumulated during the day. You can do this by opening your doors and windows to allow cool air to flow inside the home. When you circulate, air causes it to cool off a bit. Therefore, switching out the hot daytime air with the cool night breeze reduces the indoor temperate.

Another alternative is to hang white towels over your windows. This is one of the cheapest and easiest ways to reflect heat away from the home’s windows. You can use a curtain rod to hang white towels over your windows, and the good news is that you can easily remove them if you want to allow light inside the house or when you want to wash the towels.

6. Seal Any Leaks and Install Newer Insulation

If you have any air leaks in your home, the best way is to seal them. Like the way you wouldn’t want warm air to escape during the winter season, you also wouldn’t want cool air to escape during the hot season. Therefore, you need to consider sealing any cracks and crevices on the edges of your windows or doors to reduce the loss of cool air.

It would help if you also considered installing newer insulation because it helps prevent the escape of cool air in your home. Installing newer insulation helps keep the cool air during the hot season and the warm air in during the winter. Insulating your home correctly also assists in raising your home’s value, which means you need to ensure you install ideal insulation for the climate in your area.

7. Paint Your Roof White and Use Thick Curtains

The option of painting your roof white is quite labor-intensive but worth it. The disadvantage of this option is that you may have to ask for permission from your homeowner’s association. Painting the entire roof of your home white helps to reflect heat and is known to be very efficient in keeping your home cool when there’s so much heat.

Research has shown that buildings or homes with white roofs are averagely 250F inside compared to buildings with darker roofs. You can also use thick curtains or blinds, which are preferably light in color. Curtains or blinds are a good alternative to reflective surfaces.

You can keep your curtains or blinds completely closed during the day so that they can be effective. If you don’t have light-colored blinds or curtains, you can use thick curtains to block and reflect the incoming heat.

8. Use Solar Film on Windows and Replace Incandescent Light Bulbs

This is similar to the way you would tint the windows of your car. The solar film’s main objective is to darken the windows of your home to allow less light and heat to pass through. Aside from just cooling your home, installing solar film on your windows can also help add value to your home, and some of them even can generate power.

The other alternative to using solar film on your windows is to replace incandescent light bulbs. Incandescent light bulbs typically produce more heat compared to newer LED or CFL ones. Therefore, you need to consider replacing all the light bulbs in your home with greener ones to save money on your power bill and also stay cooler during the night.


You can also build your own AC unit if you don’t want to spend a lot of money buying a new air conditioner. For this project, you can use materials from a hardware store and ice. This can be a great way to save money and still manage to stay cool in your home.


Using a cheap way to block heat from windows is an excellent option to consider, especially if you’re struggling with too much heat in your home. This normally happens during the hot summer season, but the good news is that I’ve offered you some essential tips and ways to solve this issue.

Be sure to try any of the techniques mentioned above, and feel free to tell me whether you succeeded in the comments section below. You can also send me any questions you may have through the comments section or email me directly.