5 Reasons Your Home is Too Hot & How to Fix It

Planning your summer escape to the nearest public air-conditioned space? Hold it right there!

On a hot summer day, is your home unbearably hot? Do you find it virtually impossible to sleep? Do you settle for band-aid solutions like letting your air-conditioner run non-stop while saying that you’ll “just deal with” the energy bills when they come?

Make your home a cool haven with these 5 tips for keeping your home naturally comfortable without the need for extra air-conditioning.

1. Gaining Hot Air, Losing Cool Air

Does your home quickly become hot again as soon as your air-conditioner thermostat switches off? Draught is invisible and can be responsible for up to 50% of your expensive heating and cooling being lost to outside. This can happen through gaps in doors, windows, architraves, wall vents and more!

What to do about draught: Real Draught Proofing goes beyond door snakes and sticky foam seals. Seek professional, architectural solutions to properly and permanently seal your home. This will help you to control your home’s ventilation and reduce your air-conditioning bill. 

2. Heat Coming in via Your Windows

Do you feel the radiant summer heat coming in through your glazing despite having your blinds and shading in place? Glass is an excellent conductor of heat, and if your windows are single glazed, heat will be radiating into your home and making it hot and uncomfortable. 

What to do about your windows: Don’t worry, you don’t have to replace your windows. Secondary Glazing or (retrofit double glazing) is a great alternative to double glazing, it delivers all of the same thermal benefits without needing to replace anything. Remember to choose a secondary glazing system that still allows your windows to open and close as they did before so that you can take advantage of that evening breeze! 

3. Heat Pushing Down from the Roof Space

As your roof space heats up, heat is pushed down through the ceiling into your home, you may even feel it building up overhead. The heat from the sun is stored in your roof tiles and wceiling space and continues to heat your home, not allowing it to cool down overnight and making it very uncomfortable inside.

What to do about a hot ceiling: Ceiling Insulation is the most important insulation in your home. Many of us believe we have it but often it isn’t enough or it has moved over time. Consider augmenting your existing ceiling insulation with something that is non-allergenic, moisture and rodent resistant and maintains its shape long-term. 

4.Heat Rising Up From Below

If your home is built off the ground, (eg. on stilts), you’ll be aware that hot air can build up under your floor, rising up through your floorboards and heating your home from below.

What to do about heat coming in under the floor: Properly insulating under your floor will prevent heat entering your home from underfoot. For the best possible results, ensure you use a high quality polyester insulation, stapled firmly and permanently beneath the floor.

5. Heat Radiating Through Your Walls

Uninsulated walls conduct heat into your home extremely easily, especially if you’re in full sun. If you have brick walls, you’ll know how hot those bricks can become when the sun starts to heat them up. This heat is stored in the brick and continues to push itself into your home making it very hot and night and hard to sleep comfortably.

What to do about heat coming in though your walls: Retrofit Wall Insulation can be applied to weatherboard and brick walls, it’s pumped in via a hose to ensure it can be filled to the brim for optimum coverage and effectiveness. This insulation creates a protective barrier between the hot outside sun and a cool and liveable interior space.

Want to receive tailored recommendations specific to your home in a prioritised step-by-step plan?

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13 comments… add one
  • Annie Frances May 25, 2016, 5:42 am

    My house is incredibly hot for the summertime. I think it might be because of little ceiling insulation. Fortunately, I already called a company to repair a hole in my ceiling. Maybe they can add insulation to the ceiling as well. Thanks for the tip!

    Reply
    • ecoMaster June 1, 2016, 10:48 am

      Hi Annie, we’re glad you found this post interesting. Just remember to review your options when choosing the best ceiling insulation for your home. We always recommend polyester ceiling insulation because it’s proven to hold its loft (thickness) long-term, which is what will keep your home cool in summer and warm in winter.

      This is another article about ceiling insulation that you may find useful: Ceiling Insulation: How Much is Enough? [CLICK TO READ MORE]

      We wish you all the best in making your home more comfortable, please get in touch if there’s any way we can support you further.

      Reply
  • Alice July 27, 2016, 1:02 pm

    This article is very informative. There are a lot of factors why your home could be so hot. Insulation can only answer so much.

    Reply
    • ecoMaster July 28, 2016, 2:10 pm

      Hi Alice,

      Thank you for your comment, you’re absolutely right. There are many things that influence how our homes hold a comfortable temperature and while insulation is extremely important, it’s important to consider draught and glazing too.

      By considering your home as a whole system and creating a prioritised plan, you’ll get the best value for your money and feel more comfortable sooner.

      All the best with making your home cooler.

      Warm Regards,

      The ecoMaster Team

      Reply
  • Sarah December 30, 2016, 7:55 am

    no wonder my house is so hot. It is in full sun, no ceiling insulation and raised off the ground. Unfortunately I’m renting and the owners are unwilling to do anything about it.

    Reply
    • ecoMaster January 5, 2017, 11:40 am

      Hi Sarah, Thanks for your comment. We are finding landlords are becoming more amenable to retrofitting their properties as tenants are becoming more discerning about the comfort of the home they rent. Retrofitting is also tax deductible! Regards ecoMaster team.

      Reply
  • Del February 27, 2017, 9:29 am

    Thanks for the information, exactly what I was looking for, looks like roof insulation is the way to go, hopefully it won’t cost an arm and a leg!

    Reply
    • ecoMaster February 27, 2017, 10:08 am

      Hi Del,
      When researching insulation, be aware that poor quality insulation is unlikely to achieve a good result for you or your family.
      If budget is an issue, consider adding insulation is stages – using the best quality insulation in the most used part of your home.
      Then covering the remaining areas as budget permits.
      The saddest calls we receive are those with someone lamenting that they used poor quality insulation to save money, but are still uncomfortable with high energy bills.
      Warm regards, ecoMaster team

      Reply
  • Linda Hunter April 5, 2017, 10:17 pm

    Hi. My home is steel frame with hardie plank. and is sealed so I cannot move a plank to see what is inside. There is supposed to be insulation in the walls but one interior wall that has sun on it all day warms ups and is hot to touch, even my pillows on my bed are hot. If there is insulation in the wall should the interior get this hot to touch making the bedroom stifling. The house is only three years old.

    Reply
    • ecoMaster April 6, 2017, 9:31 am

      Hi Linda,
      Thanks for your question. I’m not sure of your physical location… if you can drop me an email to sales@ecomaster.com.au, with that information that would be helpful. For everyone else reading this comment, it certainly does not sound like the walls have been insulated correctly. Hiring an assessor with a thermographic imaging camera will allow you to “see” inside the walls without removing planks or drilling holes in the walls. As the home is only 3 years old, it will still be under a Builder’s Warranty – so you may consider organising a Building Inspector with a thermographic camera to write a report on your home and then take the issue up with your builder.
      If the wall imaging shows you do have insulation, and it was installed to a good standard, I would recommend you look at one or more forms of external shading – such as a slimline water tank/s, (solar) pergola, deciduous shrubs / trees, to stop the sun from hitting that wall. Once the heat is inside your home, it is a much more expensive proposition to remove it. Warm regards ecoMaster team

      Reply
  • Ricardo May 15, 2017, 9:32 pm

    Hi there,

    I m soon building my own house in the North East of Thailand. There temperatures are very high (can easily reach the 40 degrees Celsius) and it does not get any better during the nights. We have a short “Winter” with temperatures going as low as to 10 degrees Celsius but it takes just a couple of months. What kind of insulation should I give priority to? Walls? roof? floors? all the above? Are the materials of good insulation too expensive?Thank you.

    Reply
    • ecoMaster May 16, 2017, 9:54 am

      Hi Rick, Thanks for your question. The co-founders of ecoMaster were recently on a 500km 5 day bike ride in Thailand raising money for Hands Across the Water, so we are aware of the temperatures in Thailand! 🙂 The issue for you may be the availability of good quality insulation – we are unfamiliar with the brands available in Thailand, so treat these comments as good principle guidelines.
      In a hot moist climate, we would consider polyester bulk insulation to be a good place to start (see this site for examples of the best insulation available in Australia) for ceilings, walls and underfloors. This is because polyester insulation will not carry mould and will dry out completely, with no damage to the insulation, if it gets wet.
      To further reduce the impact of heat, you should consider including reflective insulation as well. Bulk insulation installed first, then reflective after that (so reflective insulation would need to be outer most facing product).
      If budget is a major issue, do not skimp on the quality. Invest your money where it would be the most difficult to retrofit later – that would be your walls. You can also retrofit insulation into a ceiling when you have the funds available, and then later again under the floor.
      A very important issue for you is the design of your home (research Passive Solar Homes) before thinking about insulation. A design sympathetic to the sun’s orientation will make an enormous difference to the comfort of your home. Another major impact on your home is the ability to get good cross flow of ventilation through your home. Consider where the prevailing winds come from and ensure your windows are oriented so they can pick up that breeze and direct it into, and through, your home. Best of luck with the construction of your new home. Cheers Team ecoMaster

      Reply
  • Vannesa Rivas June 6, 2017, 2:44 pm

    Thanks for the article, it helped shed some light on what we can do for our house. I just don’t know where to start when I live in a house that is 20+ years, mostly brick, with a high possibility of no roof insulation, and being in the desert land of Arizona.

    Reply

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