The Plus Sign System has been designed to provide optimum thermal performance. The system’s weight to heat reduction ratio is the highest in the segment. Being hollow the system has an inherent air gap which provides additional insulation. Stoneware clay provides the necessary strength for large scale installations. The proprietary butterfly clip, maintains the individual pieces in places along with providing adequate flexibility against wind loads and seismic stresses. The system is a complete dry-fit assembly, allowing easy and precise installation.