Method for constructing precast sandwich panels

A concrete sandwich panel, comprising:

• a first reinforced concrete panel;
• a second reinforced concrete panel;
• an insulating panel sandwiched between the first reinforced concrete panel and the second reinforced concrete panel;
• a tie comprising a composite material having at least 65% fiberglass, the tie comprising a generally triangle wave-shaped pattern having a period defined by peaks spaced at a regular interval and a peak-to-peak amplitude greater than the thickness of the insulating panel;
• wherein the insulating panel has a plurality of generally linear slots defined at the regular interval of the tie for receiving the tie such that opposing ends of the tie terminate adjacent to the insulating panel, and the plurality of generally linear slots are filled utilizing an insulating material upon insertion of the tie to reduce thermal bridging;
• wherein the peaks of the tie mechanically join the first and second reinforced concrete panels to the insulating panel;
• and
• wherein the first reinforced concrete panel comprises a first reinforcement installation and the second reinforced concrete panel comprises a second reinforcement installation, and the tie is not secured to the first reinforcement installation and the second reinforcement installation.