The Types segment classifies sandwich boards by core material, with four dominant sub‑types: polyurethane foam core, expanded polystyrene (EPS) core, mineral wool core, and phenolic foam core. Polyurethane foam cores dominate the market, capturing close to 40 % of value, owing to their high R‑value, moisture resistance, and adaptability to thin‑profile designs. EPS cores, contributing roughly 30 %, are favored in low‑cost construction and refrigeration due to their lightweight nature and ease of fabrication, though they offer lower fire resistance. Mineral wool cores, representing about 20 % of the market, provide superior fire‑rating and acoustic damping, making them the preferred choice for high‑rise buildings and industrial installations where safety regulations are stringent. Phenolic foam cores, accounting for the remaining 10 %, deliver the highest fire‑performance and low smoke emission, positioning them in niche applications such as aerospace and high‑temperature process equipment. These material distinctions directly influence cost structures, performance metrics, and ultimately the market taxonomy of Thermal Insulation Sandwich Board products.