[vc_row][vc_column width="2/3" css=".vc_custom_1434349958983{padding-bottom: 20px !important;}"][vc_column_text] Sandwich Panel Walling [/vc_column_text][vc_column_text] Precast sandwich panels provide a superior energy-efficient solution for exterior walling, whilst also being durable and fire resistant. Precast sandwich panels are typically made of an external concrete layer (non-loadbearing), an insulation layer and an internal concrete layer (loadbearing)....