John's Window Capping
Modern technology has greatly improved the energy efficiency of sealed units. Drafts are now the enemy when trying to make your home more comfortable. Consider cladding if drafts are an issue in your home. Window frames are covered with cladding and sealed at the junction where the cladding meets the glass. This has an obvious benefit of removing the maintenance factor.
Sealed units can be maintenance free, energy efficient, more attractive and easy to clean when frames are clad with metal.