What is the purpose of a weather seal in glazing?

The purpose of a weather seal in glazing is primarily to prevent air and water infiltration. Weather seals are critical components used in windows and doors to create a barrier that protects the interior of a building from external elements. By effectively sealing the edges and joints where different materials meet, these seals help to ensure that air and moisture do not enter the building.

This is essential for maintaining a comfortable indoor environment, enhancing energy efficiency, and preventing potential damage from water intrusion. Moreover, proper sealing contributes to the longevity of the building materials and improves HVAC system performance by minimizing energy loss. While aesthetics, thermal insulation, and decorative aspects can be important in certain contexts, the primary function of a weather seal is to safeguard against the elements.