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Tag: glazing bars

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 […]

Conservation Rooflights for Listed Buildings: The Complete Specification Guide

A small black steel conservation rooflight set flush into a weathered Welsh slate roof on a stone period building.

A conservation rooflight is not simply a small window in a roof. It is a piece of historically informed detailing that has to satisfy a conservation officer, a building control officer and the weather at the same time. This guide sets out how we specify them, and where specifications most often go wrong. In summary […]