Glass which slopes more than 15° from the vertical is considered sloped glazing by the major model building codes. Laminated glass is the preferred product for sloped and overhead glazing, because the glass is retained in the opening, even when broken, reducing the possibility of injury from falling glass. It can also be fabricated as a component of our Point-Supported Canopy Systems.

Point-supported canopies are commonly used as features at entrances to offices, stores and residential properties. They are defined as overhead glazing where the glass is supported by fasteners that pass through holes in the glass and that cannot be offered in annealed glass due to high stresses. The support structure can be either above or below the glass. This type of design is specifically excluded from ASTM E1300 Standard Practice for Determining the Load Resistance of Glass in Buildings and needs careful, specific engineering design. Laminated glass for use in sloped and overhead glazing can be used monolithically or fabricated into insulating glass units. Insulating glass units typically consist of an outboard lite of heat-strengthened glass that resists accidental damage caused by falling objects, and an inboard laminated glass that captures any fragments. Tempered glass is not normally recommended for the outboard lite as small broken particles can easily slide down the outside of the roof and onto the ground in the event of accidental damage.    Laminated architectural glass can be fabricated using various glass types, including low-e, clear, low-iron, tinted, reflective, patterned or wired glass to achieve desired aesthetics or to improve solar control and thermal performance. Mass pigmented and decorative interlayers can also be used to provide a wide range of effects.

For monolithic, laminated or insulating glass unit performance data, please go to SystemSelect™, our on-line glass performance calculator.

Oldcastle BuildingEnvelope® can calculate the most suitable glass for use in any given application. However, it is the responsibility of the design professional to calculate and provide the equivalent design load. This calculation must take into account the correct combination of snow load (if applicable), wind load and dead load. Without the equivalent design load, Oldcastle BuildingEnvelope® must rely on the conservative limits recommended by the American Architectural Manufacturers Association (AAMA) for four-side uniform support.

A wide selection of colors available. Decorative interlayers including Vanceva® Color, Pattern, Metallic and digital printing are also available to meet aesthetic requirement.