Our French doors are incredibly energy efficient. We use the best door systems to ensure no corners are cut. Depending on your specifications and chosen material, U-values with double glazing could be as low as 1.3 W/m2K. Make the upgrade to triple glazing and that could instead be 1.0 W/m2K.
With complete perimeter seals, all our French doors are also fully weatherproof. Not only are you safe against damp, mould and leaks, but also draughts that could affect the thermal performance.