Advantages and Selection of Glass Skylight Roofs
With the growth of China's construction industry, large numbers of civil buildings have been developed. Various types of glass skylight roofs (glass roofs and skylights) are widely used in hotels, stations, airport terminals, commercial centers, malls, exhibition halls, stadiums, museums, hospitals, and more.
Exterior shading systems for glass skylight roofs offer the following advantages:
Fast, convenient installation: outdoor shading products are typically factory-made to site measurements. On-site work mainly involves installing embeds or fixing points; installation requires only fixing and commissioning.
Excellent shading performance: exterior shading blocks solar radiation at the outer glass layer. Compared with interior shading, far less heat enters indoors. A roughly 10 cm air gap between shade and glass allows convection to remove heat—better energy savings.
Easy construction and maintenance: platforms outside glass roofs make installation and maintenance similar to ground-level work. Issues can be resolved without scaffolding or climbing equipment, reducing difficulty and avoiding disruption indoors.
Safety protection: exterior shading on glass skylight roofs forms a protective layer, reducing impact damage, limiting long-term sun exposure, lowering surface temperature, reducing spontaneous breakage risk, and protecting the glazed roof.
Glass skylight roof design should address the following performance criteria:
Strength: resistance to wind (and snow) loads. Consider regional wind speeds and corresponding wind and snow pressures.
Seismic performance: earthquake damage modes are varied. Design must ensure reliable connections to primary supports and resistance to compression deformation.
Air tightness: sealed glass skylight roofs require strict air tightness. This significantly affects air-conditioned buildings.
Water tightness: ability to prevent rainwater ingress under combined wind and rain, or with melted snow and ponding—related to wind speed, rainfall, and post-melt accumulation.
Thermal insulation: heat transfer from hot to cold side and inward transfer after absorbing solar radiation. U-value or thermal resistance varies by glass type—coated reflective glass, monolithic float glass, insulated glass, coated insulated glass, polycarbonate, and acrylic systems differ markedly.
Other design factors: acoustic performance, fire protection, hail (impact) resistance, and lightning protection. Glass skylight roofs are specialized, complex technology—small in building footprint but demanding in engineering, far more than simply placing glass on a grid.
