Sandwich panels contain thermal insulation placed between two wythes of concrete. The rear wythe is structural while the front wythe serves as exterior facing. Combined with sealed joints at the inner and outer faces, the assembly provides a necessary building envelope, air and vapor barrier in accordance with the rain-screen principles.

A single or isolated precast concrete panel has the properties necessary to make an excellent firewall at a highly competitive price. Fire walls can be insulated.

Structural precast panels are designed to eliminate structural steel in a building, and to hold up roof systems such as joists, hollow core precast panels.