Isovitrage Film -- Information on adhesive windows films

Economic choice for energy savings

The use of a window film with a low-emissivity or Low-E coating makes it possible, depending on the season, to limit the heat gain or loss through the glass in the joinery.

As part of the renovation, replacing the joinery is not necessarily necessary. Indeed, if the windows are in good condition without any sealing problems, applying a four-season thermal insulation film may be recommended for single glazing but also double glazing.
Thanks to the low emissivity properties of this type of window film, heat loss is partly stopped by re-emission of infrared produced by the heating systems towards the interior of the room, a phenomenon which is not possible with a glass alone. In addition, with a reduction of almost 28% in the U-value of single glazing, a low-emissivity film improves the insulating power of the glazing with the added benefit of re-emitting infrared rays into the room.

With installation costs much lower than replacing joinery,
applying a 4-season thermal insulation film is the most economical choice
for transforming simple glazing into glazing with reinforced thermal insulation.

Energy savings a challenge for energy sobriety

By conserving the heat of heating systems within homes in winter and controlling excessive solar heat input in summer, 4-season thermal insulation window films enable substantial energy savings and reduce the energy bills of a building's residents.

The result of decades of research and technological development, these window films are the best allies for gaining thermal comfort and reducing energy costs throughout the year.

Reduction of heat losses

Low emissivity (Low-E)

Measures the ability of a surface to absorb or reflect far infrared rays.
The lower the emissivity, the better the insulation value of the glazing.

4-season thermal insulation films undergo metallization with compounds known for their low-emissivity properties. The most efficient are silver and gold, thus making it possible to achieve very low emissivity. A 4-season thermal insulation film with a low-emissivity coating will re-emit infrared radiation produced by heating systems towards the inside of the building by reflection. Consequently, the closer this absolute value is to zero, the better the insulation performance will be in terms of heat loss.

Comparative graph of low emissivity properties between 4 season thermal insulation films and a solar protection film compared to 4mm single glazing and 4/16/4 double glazing

Increased insulating capacity in winter

Winter U-value

Heat transfer measurement for an area of ​​1m² with a temperature difference of 1°C (unit in W/m².°C).
The lower the U-value, the better the insulation value of the glazing equipped with a film.

This type of low-emissivity film increases the insulating power of your glazing by lowering their U value, meaning that it reduces the thermal exchange of air masses between the exterior and the interior of a building.

It is therefore possible to improve the U value of glazing for better thermal insulation :

• improvement of up to 28% in the U-value of a single glazing (4mm)
• improvement of up to 18% in the U-value of a double glazing (4/16/4)

Comparative graph of U values between 4-season thermal insulation films compared to a solar protection film, single glazing (4mm) and double glazing (4/16/4)

Reduction of excessive solar heat gain in summer

Solar g-factor

The accumulation of solar energy transmitted through the glazing equipped with film with the solar energy absorbed and then re-emitted towards the interior of the building.
The lower the value, the better the athermal value of the glazing equipped with a film.

4-season thermal insulation films remain above all solar control and protection films. Whether reflective or neutral, these window films will effectively reduce the total solar energy gain in order to reduce the excessive input of solar heat in summer and consequently reduce the use of air conditioning.

Comparative graph of the solar g-factor values ​​between the 4-season thermal insulation films and a solar protection film, installed on a 4mm single glazing and 4/16/4 double glazing