4 Tips on How to Block Heat from a Sliding Glass Door

Do you feel hot when the sun shines through your sliding glass doors? Trying to block heat from your sliding glass door? So, you are in the right zone. Because in this article, I briefly discussed How to Block Heat from a Sliding Glass Door?

Briefly speaking, you can block heat from a sliding door by following the following steps. They are sealing it, ventilating, adding insulation, and moving close to nature. 

How to Block Heat from a Sliding Glass Door

A glass door can trap sunlight and convert it to heat when it enters your home. So, if you want to keep your home cool all day, simply apply the right steps to get the right solution. 

4 Tips on How to Block Heat From a Sliding Glass Door

Seal It

You can block heat from a sliding glass door by sealing it. Do this by weather-stripping the door or using a sealant. Weather-stripping is when you put a strip of material around the door to create a barrier. 

 4 Tips on How to Block Heat from a Sliding Glass Door

This will prevent air and heat from coming in through the cracks. A sealant is a liquid that you apply to the door that will harden and create a seal. This will also prevent air and heat from coming in through the cracks.

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Ventilate It

By opening the door slightly, you can create cross-ventilation and allow hot air to escape. Additionally, you can install awnings or shade screens on the outside of the door to block the sun’s rays. 

Another way to keep your home cooler is to invest in some energy-efficient window treatments. Finally, make sure that your sliding glass door is well-sealed to prevent heat from seeping in. For others information, you’ll need to know How to Adjust Rollers on Andersen Sliding Glass Doors?

Add Insulation

One way to reduce the amount of heat that comes in through your sliding glass door is to add insulation. You can install a storm door or add weather stripping around the door. 

Additionally, you can hang heavy curtains over the door or invest in window film. All of these options will help create an extra barrier between the outside heat and your cool, comfortable home.

Move Closer to Nature

Being closer to nature has so many benefits. Not only does it help you feel more connected to the world around you, but it can also help boost your mood and improve your overall health. 

Plus, being close to nature can also help block out excess heat from a sliding glass door. On the other, if your sliding glass door is broken. So learn here how to Fixing sliding screen doors that won’t fit.

Do Sliding Glass Doors Let In Heat?

The answer to this question is yes. Sliding glass doors let in heat, but they do not let it in as much as a regular door. Not only that but also sliding glass doors are notorious for letting in heat. 

Do sliding glass doors let in heat

This is because the glass on a sliding door has a higher R-value than the glass on a regular door.

But there are ways to help mitigate the issue. Here are four tips: 

  • Use window treatments. Curtains, blinds, and shades can all help block out the heat.
  • Install reflective film. You can find this at most hardware stores. It helps reflect sunlight and heat away from the door.
  • Add weather-stripping. This will help seal any gaps around the door, preventing heat from seeping in.
  • Upgrade your glass. If your sliding glass door is old, the glass itself might not be very energy-efficient. Talk to a glass company about upgrading to a more modern option. 


How do you block the sun on a sliding glass door?

Though I briefly answered that How to Block Heat from a Sliding Glass Door. However, let’s know it again in another style:

  • Get a door shade or screen. You can get these materials at any hardware store.
  • Install a window film. This will help block out the sun’s rays and keep your home cooler.
  • Hang heavy curtains over the door. Choose a thick fabric that will not let the light through easily.
  • Place a piece of furniture in front of the door. This will help block the sun’s rays and keep your home cooler.

Does aluminum foil on windows block heat?

Yes, but it doesn’t do a great job of blocking out light, but it does an excellent job of reflecting heat. Windows are typically the culprit when it comes to letting heat in, so by covering them with foil, you can keep your home much cooler during the summer months.

Last Thoughts

So far I did try to explain How to Block Heat from a Sliding Glass Door in four easy steps. When you want the cheapest option, choose aluminum foil or bubble wrap. 

If applied, one or the other will make your windows look a bit blah, so think about making a small investment in more eye-catching window coverings like film or blinds. The benefits of saving on air conditioning bills might outweigh the costs.