For R = 3.00, each core needs:
Required core thickness = R × λ. Thinner is not automatically better — read the trade-offs.
The full picture
Representative values for a Technopol panel/board core. λ, density and cost are editable — drop in your project figures.
Honest by design. These are representative figures for typical Technopol cores, not a project spec:
EPS/StoneWool thermal & fire figures trace to Technopol test data (incl. SANS 54509 ITT OTH-T-2309-04 and SANS 10177 fire reports);
PIR figures are indicative. Fire ratings apply only to the tested assembly and some test reports are past their 5-year validity —
confirm the current certificate. λ, weight and cost decide the choice together with fire, moisture and structure. Confirm final figures with Technopol.