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Attic insulation is essential. It reduces heat losses by up to 30%, which represents a real saving on the heating bill and a significant ecological act. Depending on the type of attic, there are several insulation techniques. Several financial aids are possible to reduce the cost of insulation.

Why isolate his attic?

In a house, all the walls (walls, floor and roof) present a risk of heat loss but the roof is the area that lets out the most heat. Indeed, the roof represents a thermal loss of nearly 30%. That's why good attic insulation can save 30% on your heating bill. When we talk about insulation, we often think about keeping the heat inside the house but it also has a real advantage in summer. Good attic insulation can lower the roof temperature by 7 to 8° C.

How to isolate his attic?

The type of attic insulation varies depending on the type of house. Even for an already insulated house, it is sometimes interesting to put an extra layer of insulation to further reduce heat losses.

For the attics lost there are two techniques of insulation: insulation by a wool unwound or insulation by blowing.

The first is to unroll the insulation between the joists or on the floor of the attic. This solution is only possible if the roof height is sufficient for the installer to move.

The second consists of blowing nodules into flakes of mineral wool. This solution, easier to perform, allows to fill the gaps for optimal insulation.

For converted attics, opt instead for insulating panels or insulation roll to fix directly under the roofs.

Attic insulation, a profitable investment?

Insulating his attic is an investment that saves up to 30% of his heating expenses. On the other hand, it allows to value the house in case of sale.

Attic insulation can benefit from a 15% tax credit on labor and the price of insulating material. It is valid only if the work is done by a professional and if a minimum level of performance is achieved. The attic floors must have a thermal resistance equal to or greater than 7 m².K / W, and in terms of ceilings, their thermal resistance must be equal to or greater than 6 m².K / W.

In addition to the tax credit, there are other financial support such as Eco PTZ (eco zero rate loan), awarded when carrying out a work package to save energy (two types of works minimum), the aid of the Anah (National Agency for Housing) within the framework of the program "Habiter Mieux" or aid from local authorities.

Given these different elements, the insulation of its attics can be profitable in a few years.


Video Instruction: How to Beef Up Attic Insulation - This Old House