Accurately measuring space before installing interior insulation is a key step in ensuring an optimal result in terms of both thermal efficiency and room livability. The addition of an interior thermal insulation system inevitably results in a reduction in available space, as insulation materials occupy a lot of volume within rooms.

Insulating materials vary in thickness depending on their coefficient of thermal conductivity (λ). The higher the required thermal resistance, the greater the thickness required to achieve the desired effect. For buildings with limited interior space, it is advisable to opt for high-performance materials with low thermal conductivity in order to minimize bulk.

Nobilium Thermapanel interior thermal insulation has a maximum thickness of only 9 mm.

Installation of interior insulation may interfere with pre-existing windows, doors, electrical outlets and furniture. In some cases, insulation may also reduce the width of hallways or the usable area of small rooms. Although a few inches of insulation may seem negligible, in small rooms or buildings with architectural constraints, every inch counts.

It is important to consider whether the trade-off between energy efficiency and space reduction is acceptable or whether alternative solutions, such as low-thickness Nobilium Thermalpanel insulation, are preferable.

Some building codes then impose minimum limits on habitable spaces (e.g., minimum room height or minimum floor area). Interior insulation too often could lead to noncompliance with current regulations. The standard for ensuring livability, and regulations specify minimum floor areas for each room. For example, a living room must have a minimum area of 14 m², while a single room must have at least 9 m².

Interior thermal insulation of 10 cm on all perimeter walls reduces the floor area of the house by 4 to 7 m². The economic loss resulting from the reduction in the floor area of a house due to interior thermal insulation depends on several factors, including:

• Value per square meter of the property (€/m²), varies according to location, building quality, and local real estate market.

• Lost surface area , which in our case varies between 4 and 7 m² .

• Market perception , since a reduction in floor area can affect the overall value of the property beyond a simple arithmetic calculation.

If the value of the property is particularly high (e.g., in the city center or in valuable areas), the loss can exceed as much as 50,000 € , especially if the subtracted space affects the functionality of the house (reduction of rooms, narrower hallways, etc.).

Using interior thermal insulation such as Nobilium Thermalpanel leads to multiple benefits in terms of interior space recovery, reduced heat loss from walls, ceilings and floors, and improved living comfort.

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