LAMBDABOARD® Laminated polyisocyanurate core board (PIR), minimum of 34kg/m³ core density, in a minimum thickness of 50mm; Upper facing to be natural matt mineral-coated fiberglass tissue; lower facing to be white matt mineral-coated fiberglass tissue, laminated on both sides.  The acoustic thermal panel shall be laminated with a 50mm Rockwool 90kg/m³ density using fire retardant adhesive and supplied in widths of 1220m; to be fixed to sub frame / mounting structure according to engineers’ specifications