Glass Wiki
Objective comparisons between roof light types, materials and systems.
Dome roof lights and roof lanterns are both raised above the flat roof plane, but they differ in form, material and architectural intent. Compare profiles, materials, cost and when each suits your project.
Glass and polycarbonate are both used in overhead glazing, but they differ sharply in clarity, durability, thermal performance and regulatory acceptance. Compare the two materials for UK roof light specification.
Thermal roof lights use insulated glass units with low-E coatings and warm-edge spacers to limit heat loss. Non-thermal or single-skin units offer little insulation. Compare U-values, condensation risk, regulations and when each specification is appropriate.
Circular and rectangular roof lights differ in form, light distribution and manufacturing constraints. Compare aesthetics, maximum sizes, installation and when each shape suits your extension or refurbishment.
Fixed roof lights admit daylight only; opening units incorporate hinges or actuators for ventilation. Compare profiles, cost, weathering, controls and when each type suits UK residential extensions.
Roof lanterns and flat roof lights both bring daylight into single-storey extensions, but their form, internal volume and architectural character differ. Compare profiles, light distribution, cost and when each suits your layout.
Polycarbonate domes and glass roof lights both admit daylight through a flat or shallow roof, but differ in material, appearance, durability and thermal performance. Compare the two approaches for UK residential and light commercial projects.
Frameless and framed roof lights use similar insulated glass units but differ in how the glazing meets the ceiling and roof deck. Compare internal appearance, weathering detail, cost and when each construction suits your project.
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