Ecoplan Premium Single Pitch Overhead lighting in the building will be provided by Ecoplan premium single pitch saddle rooflights supplied by the Kingspan Light + Air establishments, sloped from 10 to 90°, comprising a self-supporting rough anodised or painted aluminium frame: thermal-break profiles, fastenings protected against corrosion. Glass double glazing with a thickness of... mm. Ecoplan Premium Dual Pitch : Overhead lighting in the building will be provided by Ecoplan premium dual pitch saddle rooflights supplied by the Kingspan Light + Air establishments, sloped 30 to 45°, comprising a self-supporting anodised or painted aluminium frame: thermal-break profiles, fastenings protected against corrosion. Glass double glazing with a thickness of... mm.