Roof insulation

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When insulating your roof from the outside, the insulating materials are laid between the roof structure and the roof covering.

When you insulate your roof from the outside, the inside of your house remains intact. The work will be more extensive and take longer. The roof covering will have to be temporarily removed. Roof insulation from the outside is the solution for you if you had decided to change the roof covering anyway. This way, you can combine the replacement of the roof with the insulation, and save on a number of costs such as scaffolding, containers, etc.

Roof insulation from the outside also avoids the risk of thermal bridges. These are areas in a house where the insulation is interrupted and heat escapes. By insulating from the outside, your roof will have an uninterrupted layer of insulation.

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Roof insulation is crucial to the thermal comfort of a home. Heat loss through the roof can account for up to 30% of your home's energy consumption. So insulating your roof, either by blowing it off or fitting insulation, is a priority if you want to save energy. It's also an effective way of improving your home's energy performance, which may make your work eligible for financial assistance.

Good insulation starts with the choice of insulating material. Among the most common are glass wool, mineral wool and cellulose wadding. Mineral wools are often used in rolls or panels for internal insulation. For under-roof insulation, on the other hand, expanded polystyrene or wood wool may be a more suitable insulation solution, thanks to their good thermal resistance and airtightness.

Insulating attics, whether lost or converted, is just as important. Blown-in insulation is a highly effective technique for insulating lost attic space. This involves blowing a layer of insulation, such as glass wool or cellulose wadding, directly onto the attic floor. Converted or convertible attics, on the other hand, require insulation of the roof slopes and walls. You can use insulation materials in rolls, rigid or expanded, such as sheep's wool or hemp wool, for optimum thermal and acoustic insulation.

But how do you insulate your roof or attic effectively? To ensure good insulation, it's crucial to follow certain steps. First of all, you need to lay a first layer of insulation between the roof beams or framework. This first layer must be followed by an airtight membrane to prevent water infiltration and warm air leaks. A second layer of insulation can then be laid, perpendicular to the first, to eliminate thermal bridges and optimise sound insulation. This insulation technique can also be used for habitable attics.

For more specific roof insulation work, such as wall insulation or flat roof insulation, you may need to call in a professional. He or she will be able to advise you on the various insulation techniques, the choice of insulating materials and the thermal regulations in force.

Finally, don't forget that to maintain good roof insulation, you need to ensure that your living space is properly ventilated. This ventilation helps to limit condensation and the build-up of water vapour, which could reduce the effectiveness of your insulation.

Roof insulation, whether from the inside or the outside, is a crucial stage in energy renovation work. Not only does it ensure thermal comfort in attics that can be converted or under habitable attics, it also means substantial savings on your heating bill.

In conclusion, roof insulation is an investment that will help you reduce your energy bills, improve the thermal comfort of your home and enhance the value of your property. Whether you have lost attic space or attic space that can be converted, and whether you want to insulate your roof, your walls or your attic, there are insulation solutions to suit your project. Don't hesitate to call on an Ajusto professional to help you with the work and advise you on the best roof insulation techniques and the most effective materials.