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5 tips to improve the insulation of the house

Improve the insulation of your home is not necessary, do you think? And if there were still possible improvements? From the
attic to the windows, through the roof and the walls, here are our 5 tips to better plug the holes. Isolation often rhymes with the age of the house. To know if you should better isolate yours, know that a house prior to 1980 is unlikely to have been properly isolated . Between 1980 and 1990, the insulation is generalized but the standards of the time are now far exceeded! It was not until 1990 that the walls and roofs began to be well insulated. But not all … Other details betray bad insulation, we help you to identify them and, above all, we give you tips to improve the insulation
of your home.

1. Insulation of the roof: up to 30% savings

Better insulation of the roof saves energy of around 30% According to current standards, good roof insulation in an existing home must be at least 18 to 20 cm thick . Other factors also come into play in order to benefit from insulation or renovation bonuses in Wallonia , Brussels or Flanders . If you have an under-roof, it all depends on the thickness of the rafters. If they measure at least 18 cm, nothing more simple: insert glass wool or mineral between them – or complete if there were already 6 cm. If they are thinner, you can either reinforce them to the desired thickness, or fill the available space with thinner insulation wool and cover it with polystyrene panels, or polyurethane (read also our article ” 7 types of insulation for your roof “) And if you do not have under-roofing and therefore no insulation, the best is to ask one from the outside, removing the tiles first. The insulationcan also be done from the outside, for example with panels.

2. Attic insulation: an alternative solution

The insulation of the attic, the attic, is often forgotten or it avoids a waste of energy. Not to use them, we end up forgetting them and yet: the attic, even lost and difficult to access, must be isolated at the risk of causing much waste. If your attics do not need to be heated, the best is to isolate them by the ground . Either directly on the concrete, spraying polyurethane foam on top for a very homogeneous insulation; in a vacuum of 20 cm created above the concrete with wooden panels, into which cellulose or glass wool or blown rock is blown. As many natural insulators whose insulation coefficient is close. And their lifespan is in ten years.

3. Insulation of the walls: -20% on the heating bill

Improving the insulation of the walls would achieve 20% savings on the heating bill If your exterior walls and windows are cold or cold in the winter and hot in the summer, there is no doubt that your home needs insulation. Ditto if as soon as the heater stops turning, your rooms will quickly become cold or the temperature will be slow to rise when you increase the thermostat. Walls are the second biggest source of energy waste, responsible for 20% to 25% of heat loss . If your home was built after 1950, there is certainly a gap between your exterior and interior walls. To know if this vacuum contains an insulator, it will be necessary to probe it. Better to call a professional who will then proceed to the insulation of your hollow walls .

This is to put in place an insulating layer between the outer and inner walls. This is by far the most advantageous method

• it produces little or no nuisance during installation;
• it requires only one day of work on average;
• it does not require a building permit and offers an invisible result;
• it is cheap.

A hollow wall can be isolated either by injection of foam, flakes or granules.

Be aware however that to be able to inject an insulator in the thickness of the walls, it is necessary to have at least 5 cm of vacuum. If the insulation that is there is insufficient but there is not enough space, it remains the solution to isolate from the outside : it requires to call a professional, to obtain eventually a building permit … and multiply your insulation budget by 6 or 7 . There is also the possibility of insulating from the inside, but you lose some interior volume.

4. Insulation of windows and chassis for guaranteed comfort

Placing high-performance glazing and new chassis improves home insulation If your windows are often covered with condensation on the inside and / or if your home does not have a double-glazed frame yet, it’s time to opt for high-performance glazing and change your chassis . Pay close attention to the insulation coefficient of your chassis profiles: they can vary from single to double. You will find more tips in our article ” New windows: 5 criteria for choosing them “.

5. Avoid heat loss

To reduce drafts and improve the insulation of the house, it is sometimes enough to lay insulating joints They look like nothing and yet, small heat losses end up weighing heavily on the energy bill. They are also felt comfort side. Think of this little draft that annoys you when you are comfortably installed in the living room … The cold air easily benefits from the lack of tightness of your doors and windows to slip inside. To identify drafts, test the candle. The flame flutters like a flag when you approach a door or window? This is an obvious sign. We must fill in the gaps. Install door sills, make your windows insensitive to drafts with gaskets or foam insulation, install a flapper to close the chimney of your open fire and replace old electrical outlets with waterproof housings in the air. You will feel the difference!