Simple Guide On How To Block Heat From Windows DIY Style

Do you live in a place with loads of sunlight? Even though sunlight is very important for human health, being exposed to it for long periods of time can be detrimental in many ways. To protect your place from the blazing, scorching heat of the sun in the summer, the first thing that you may do is blast the air conditioner or tower fan at max. Even though this will work temporarily, the heat will creep its way back inside through your windows. 

brick building with rectangular black wooden shuttered windows

When the heat penetrates through the windows, the air conditioners need to work twice as hard to regulate temperature. To keep the temperature down and save money on energy bills, you have to learn energy-efficient ways on how to block heat from windows DIY, as you would block any unwanted noise. In this article, we will look at some tips that will help you.

Ways to block the heat from windows

From bubble wrap to blackout blinds, there are plenty of heat-blocking solutions that you can use. We have listed several DIY project ideas below. You can understand and compare all the options so that you will have a clear idea of what to do to protect your place from the suffocating heat. 

1. Window shades

Did you think that shades are only a great decoration alternative to curtains? Putting up simple shades is a quick and easy fix for sunlight overheating issues. Even though it will not solve the heat problem entirely, it will certainly lower the heat gain. One of the most effective ways of blocking sunlight and saving electricity is by installing blinds

There are plenty of blinds available in the market, in various designs, shapes, materials, etc. Here are a few variants of blinds that you can install.

  • Reversible shades

Reversible blinds are 2-in-1 blinds. They are light coloured on one side and dark coloured on the other. You can alternate the colours according to the weather conditions outside. 

  • Roman and roller blinds

Roman and roller blinds are also another popular, cost-effective window treatment option to block the heat. They are available in numerous weaves, fabrics, colours, etc. To keep the heat and light from entering your home, select heavier fabrics.

brown roman blind shade curtain mountain background living room

  • Blackout shades

They are made to block the sunlight completely. If you want a dark room, these are your best friends. With amazing modern interior décor ideas and techniques, there are plenty of aesthetically pleasing blackout curtains you can buy to complement your room’s décor. 

Blackout blinds are opaque – this means they won’t let any light pass through. However, you have to keep in mind that you will be giving up natural light in exchange for the heat-saving benefits of blackout window blinds

Here are some things to keep in mind when it comes to window shades.

  1. Honeycomb or cellular shades are the most effective shades when it comes to heat insulation. Honeycomb shades trap hot, which reduces the solar heat gain
  2. You can also add sidetracks to the shades so that they sit closer to the windows and block out more heat. 
  3. Keep the colour of the shades in mind as well. A lighter colour like beige or white will reflect the sun’s rays in a better way than a darker colour. 
  4. For maximum benefit, you have to install the shades as close to the window frame as possible

2. External window shading

Another option is to create shade outside the room’s window. You can easily create a sunshade, do it yourself style, or get professional help if you deem fit. You can install eaves or awnings over your windows. 

man installing awning on house facade

This will reduce the amount of heat and sunlight that actually hits the window itself, which will in turn reduce the sun’s heat intensity. Roof overhangs are great, particularly for south-facing windows. If you install them correctly – in the right orientation – the overhangs will keep the sunlight from entering. 

This will keep your house cool in the summers. Apart from window awnings, you can install exterior solar shades as well. They are durable, reduce glare, and are low-maintenance. They keep the UV rays from entering the room and disrupting the indoor temperature

Plus, their slim and sleek design makes your windows look modern as well. They are very easy to install – simply follow the instructions that come along with them.

3. Bubble wrap window insulation

Want a low-cost solution and aren’t really concerned about the aesthetics of the place? You can go with the bubble-wrap window insulation idea. If you want to block out the summer sunlight temporarily, this idea is perfect for you.

The bubble wrap will create a layer of trapped, still, air that will increase the insulating properties of your window. For this to work, ensure that the bubble wrap is sealed and tightly wrapped around the window glass.  

4. Heat reducing window film

You can use a special heat-reducing plastic window film to keep the heat out. Simply buy the insulating film from your local home improvement store and apply it to the windows. Similar to the plastic bubble wrap, the film will create a small air space between the glass and itself.

If you go for this method, you can block some of the heat while still enjoying the natural sunlight. Reflective films are effective in both summer and winter.

5. Aluminium foil

A cheap, affordable, and instant solution for blocking heat from windows is by covering them with aluminium foil. Tape the foil to the windows in such a way that the shiny side faces outwards

However, this cheap way of covering the windows will completely block the view, so this may not be an option for everyone. 

Window insulated with aluminium foil to protect house against heat wave

6. Curtains and draperies

If you don’t want to go with blackout curtains – an extreme solution, for some people – you can always consider getting heavy curtains and draperies to block the sunlight heat. The best materials for your curtains are velvet or cotton.

Hang the curtains as close to the windows as possible to obstruct heat by creating tighter airspace. Heavy curtains will not only block the sunlight heat but will also give you privacy. 

7. Plants and trees

Keeping plants and trees outside your windows is a great and effective way to block out the heat. They will not only provide you shade but will also purify the air around your home. Plus, they will make your windows look attractive and alluring and they will keep the space outside your window cooler.

8. Combine multiple methods

All the methods that we have listed above will block sunlight heat in their own unique way. However, to make sure that you have an effective solution, combine multiple methods. For instance, if you cover your windows with shades or blinds, it will not stop the sunlight from hitting the window from outside.

This means that even though you are keeping the heat from entering the room, once the glass heats up, heat will inevitably enter your room. However, if you install awnings or other external window coverings, you will maximize the heat blockage. 

If you combine two or three of the methods (or more, if you want) mentioned above, you will get the best possible effect. 

young woman lowering the interior shadesblinds in her modern interior apartment
In the summer, when the temperatures run high, it gets so hot that you can roast a chicken in your living room! To keep the temperatures down, most of us run the air conditioning at maximum levels. This may provide homeowners with a temporary reprieve, but it will be just that – temporary. For a permanent, affordable, energy-saving, and eco-friendly solution, you have to learn how to block the heat from windows. Not only will you save a lot of money in the form of reduced energy costs, but you will also lower the carbon footprint of your household. Using the tips and techniques for window coverings discussed in this article, you can easily stay safe and protected from the blazing sun.

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