how to block heat from windows

How To Block Heat From Windows

40% of extra heat gets into your house through the windows. You’d better take it into account and apply one of the heat blocking window coverings. By the way, too much sunshine not only leads to overheating, but also can make your soft furniture, curtains, or carpets fade, or have a bad impact on your home plants.  That’s why in some cases it is absolutely inevitable to pick an appropriate means of keeping the heat, sun, and unwanted glares away from your apartment. You can either turn yourself in speaking about the protection of your windows or fully trust the professionals in this matter. We will consider the most time-proven ways of how to block heat from windows.

Window glass increases the unnecessary heat coming into your home, so sometimes fans or cooling systems are just not enough to combat it. We dived deep into this topic to show you the more effective and low-cost means so that you can choose the best way to keep heat out of windows for you.

Now come on and do your best to make your room cooler using the mechanism you prefer. The top options to fight glare and radiation are the following:

  • Blinds
  • Awning
  • Foil
  • Bubble wrap

It is possible to select one of those options of house window sun blocker. Or there is no harm in using them in combination either. Each of them works in its particular way, but you still can gather the benefits from more than one of them to guarantee the maximum safeguard. Keep reading to get the details on every single of these ways to make your home cooler and life better.


heat reflective blinds for windows

Window blinds, or shades, are considered to be the best way to block heat from windows according to the United States Department of Energy (DOE). They typically consist of horizontal or vertical lamels which you can regulate manually to make the amount of sunlight in your apartment bigger or smaller. If the blinds stay in a completely closed position, it gives great insulation and helps to make the temperature lower. The level of effectiveness may vary and can depend on several factors. Keep in mind, however, that the most powerful shades are able to prevent up to 45% of extra sun rays from getting inside your room.

The heat reflective blinds for windows will work the best way possible when they are properly installed. Their position should be turned upwards with a convex side facing outside. In this case, all the excessive sunlight will be sent up to the ceiling so that the temperature in the rest of the room becomes lower and the glare level is kept to the minimum. And vice versa, if the blinds are turned downward, the spaces between them get wider. More of the heat and glare gets inside, and most part of the sun rays goes down to the floor, leaving less fresh air.

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Fix the blinds correctly, which means leave them as close to the window itself as possible and also fix them tightly to the adjacent wall to keep the level of both heat gain and heat loss as low as possible. In general, there is not a problem in mounting the blinds yourselves, but don’t forget about these small tips above.

And what can aid you, even more, is the fact that heat blocking window blinds can vary in terms of their protecting abilities. You should take into account such factors as which side the window is facing, what temperature is outside, and what type of shades exactly you are using. Surely, you can’t change the former two of them but can easily pay attention to the latter. Note that some kinds of these means of protection from the sun can be more effective than others.

The simple shape of Venetian slat-type shades can serve you pretty well in the serious mission of combating the heat. When they are fully closed they provide maximum security. But you also may choose to set the angle of opening to customize the level of lightness in every particular situation. The number of options you can open or close is quite impressive, so you can conveniently change the amount of light, heat, and glare. Or else, it is possible to send the sun rays right into the ceiling, which can be amazing, if it is painted bright. It will break down the light, which makes you enjoy plenty of natural light, however, without too much heat.

The next model of them is total blackout blinds. Their most significant feature is their complete opacity, which fully blocks sun heat from windows. If you don’t mind lacking the ability to regulate the amount of light and glare getting into the room and are okay with a steady level of darkness, this option is for you.

Frankly speaking, the leaders in blocking heat from getting inside are cellular or honeycomb shades. The original shape of honeycomb blinds is capable of holding air, lowering the level of heat. Another option is to add sidetracks to them to make their possibilities wider by getting them closer to the glass.

Besides, the color of your sun reflector for house windows is also of paramount importance. What counters the excessive heat best are the light tones such as white, ivory or beige. But here another problem arises: white honeycomb shades, for example, may simply not suit your room’s color palette. To solve this situation put some additional curtains, which hide the blinds and this time will play a merely decorative role. Or you can even extract the maximum possibilities of color if the blinds are of lighter tone from one side and of darker tone from the other. Lighter colors reflect the heat in summer, and darker colors trap the heat in winter, so this solution will serve you best throughout the year.


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block the sun from windows

Pretty original, but at the same time, the most time-proven way of how to block heat from windows is making an awning or eave. As it is placed outside, it keeps the heat at bay from the very beginning. As it reduces the amount of heat getting on the window, the amount of heat getting inside the house reduces respectively. It is always better to see an expert who knows exactly how to place an awning and what angle will be optimal. But you can make it a DIY project if you feel okay with it. This method is worth trying at least because it is said to decrease the level of heat from 65% to 77%, according to some calculations.

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You can go further into the external methods of combating extra light and glare. Depending on your level of experience take your own tactic or also consult a professional. Remember that plants and trees outside cast shade around them, which makes space right outside your window cooler. Besides, when plants give their vapor to the atmosphere, they lower their temperature.


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heat blocking window coverings

In fact, ordinary aluminum foil, or tin foil, can effectively block the sun from windows. Most of us got used to utilizing it as a material to preserve food, but few of us have ever thought of it as a reflective window covering. Meanwhile, its abilities to reflect the unwanted sun rays are quite powerful. To use it as a potent yet low-cost sun reflector for home windows, simply place it all over your window thoroughly with the glossy side facing outside, make it lie with an even layer over the interior glass windowpane, and carefully fix the edges with tape. This will prevent most of the extra sunshine and glare from getting inside and make the atmosphere not only cool but also pleasantly dark even on the hottest days.

There is one more similar solution of this kind. It is a plastic film designed especially for protecting windows. This insulating film is easy to install on the window. When it is fixed to the interior glass windowpane, it creates a thin air layer between itself and the glass. This method of diminishing the level of light is rather mild, so even if you totally cover the windows with special plastic film, you still can enjoy some portion of natural light.


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Bubble Wrap

sun reflector for home windows

Perhaps, you couldn’t even imagine this before, but bubble wrap really increases the insulating possibilities of the window. Moreover, it can either prevent heat gain in the summer season or prevent heat loss in winter as well. Maybe it looks not as impressive as other options on this list, but it will not be a problem if you don’t mind it. On the other hand, this is not only the most budget-friendly means, but also can be applied almost instantly.

To make this reflecting covering work, first of all, spray some water on the glass. Then slightly press the bubble side against the window. Be careful, try not to pop it. Make sure that the wrap covers the whole area evenly and fits tightly. Then fix the edges with tape and remove any excessive wrap on the sides to finish the job perfectly. Now you are pretty good to go.

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So, as you can see, it is rather an unexpected way to block heat from windows. It is extraordinarily affordable, adds an effect of double glazing, and extremely easy to apply. Perfect means of reducing heat for those who want to save money and reach the aim immediately. A space of air trapped between the wrap and the glass increases the insulating potential of the window. What’s more, did you know that bubble wrap is capable of serving for as long as seven years?

Bubble Wrap

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A Few More Last Words

And here are a few more useful facts.

What If Do Not Open The Windows At All?

Don’t even try to think about it. This should be your last remedy in terms of blocking sun heat from windows. When the windows are closed all the time, there is no air circulation, which leads to negative consequences.

Environmental Protection Agency (EPA) says that stale air is one of the most serious environmental issues. Even the most modern and powerful heating or cooling systems can not replace merely fresh air coming inside through the open window. Closed windows leave you unprotected from the bad impact of cleaning products, air fresheners, mold, stoves, heaters, and tobacco smoke. And vice versa open windows can let plenty of helpful things inside, such as fresh air, sea breeze, or pleasant scents.

How To Reduce Heat Loss Through Windows?

In fact, you don’t have to waste enormous sums of money on complicated warmth-saving methods. Instead of this, try applying these quick and easy ways to keep warmth in your apartment:

  1. Put everything away from the radiator. Soft furniture, for example, steals the heat so that you don’t even notice.
  2. Hang thick curtains that have a thermal lining on the windows and maybe also the front door.
  3. Use self-adhesive foam tape to seal any possible gaps on the edges of the windows.
  4. Strengthen the back of the radiator with reflective aluminum foil.
  5. Attach a chimney balloon to the chimney. The special material of the balloon prevents all the heat from getting out.

What If Adding A Couple Of Plants To The Interior?

So, after you decided on how to block sun heat from windows, and everything is done, the time comes to put the final touches. You have reinforced your castle with foil or blinds, awning, or bubble wrap, but this is only a technical part of the matter. Feel free to add some home plants to let some fresh breeze in figuratively as well. The tropical style will be the perfect setting for this interior solution. A stylish mini-botanical garden will have a cooling effect as everything green always does.

Now you are well aware of possible options of what to put on windows to keep heat out you have at hand. There is not much to do – just to turn everything you want into reality!


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