Manufacturing Process

Finest Quality Materials

Heritage Thermal Windows are hand-soldered decorative metal grids (mullions) custom built to your specifications.

  • Clear Double Strength (DS) Glass.
  • Decorative grids are zinc construction with antique finish.
  • Tempered glass upon request.
  • Aluminum spacer tube containing dessicant.

We use laser-welded aluminum spacer tubes filed with desiccant and a dual-seal.

Tempered glass & argon gas-filled units are optional.

The thermal units measure from 1/2″ to 1″ thick, depending on the metal came used.

What’s a Came?

Came is the industry term for the zinc metal grid that we hand-solder and mount between two panes of glass.

Our standard zinc came dimensions are 1/4″ or 3/8″ flat, or 7/32″ round.

Replace Existing Glass

Heritage Thermal Windows can be used to replace existing clear glass thermal units as long as the dimensions are the same.

Installation Procedure

Installation into the sash should follow the window manufacturer’s recommended procedures.

Tempered Glass

Tempered glass should be used in doorways, sidelights, and bathrooms. Check your local building codes.