Choosing a Heritage Rooflight: Materials, Sightlines and Thermal Performance Compared

A slim black steel heritage rooflight with a central glazing bar set into a slate roof beside a stone chimney.

Steel or aluminium-clad timber. Structural glazing bar or applied. Whole-unit U-value or centre-pane. A technical comparison of how heritage rooflights differ, and which differences a conservation officer will actually see. In summary Heritage rooflights divide into two broad constructions: purpose-made steel conservation rooflights, and volume roof windows with a timber core and aluminium cladding configured […]