Custom Wooden Windows and Energy Efficiency in Parisian Renovations
Paris Fenêtres Technical Resource
Under recent French climate legislation, rental properties with poor energy ratings (DPE classification F and G) face strict leasing bans. Upgrading windows is the highest-yield intervention in stone buildings.
Thermal Insulation Coefficients (Uw)
- Old Single Glazing: Uw values exceeding 4.8 W/m²K.
- Modern Timber Double Glazing: Uw values below 1.3 W/m²K with argon gas fills and low-emissivity coatings.
Investing in tailored French oak or forestry-certified timber windows simultaneously enhances property value, curbs winter heating loss, and complies with stringent Parisian condominium regulations.