Suppliers of Skylights & Roof Windows• Large range of makes & types.• Very competitive prices• Domestic and Commercial• Sales• Suppliers & Installers• Repairs and Maintenance• FREE QUOTES• Old Skylights restored• Workmanship guaranteed• NORTHLAND WIDE• NO LEAKSWe also supply and install Whirly Vents, Sellwood Attic Stairs & Showerdome.Suntrenz rectangular skylights have a much larger light collection area thanmost round tube skylights. For example a 600mm x 400mm Suntrenz model collectsfour times more light than a 250mm round tube model. The volume of light reachingthe room is therefore much greater. The real difference is especially noticeable earlyin the morning and later in the evening when there is little or no direct sunlight.