The Types segment classifies fire retardant treated timber by the treatment methodology and chemical formulation. Pressure‑impregnated timber involves vacuum‑drawn retardant solutions forced into the wood matrix, delivering deep penetration and consistent performance across load‑bearing members. Dip‑treatment applies retardant through immersion, suitable for non‑structural components such as decking and cladding where surface protection suffices. Spray‑on systems provide a rapid, on‑site application for retrofits and repairs, offering flexibility but limited depth of cure. Within each method, chemical families—such as phosphorus‑based, nitrogen‑based, and inorganic mineral salts—further differentiate performance attributes, including ignition delay, heat release rate, and smoke suppression. By isolating these treatment types, analysts can attribute market revenue to specific technology pathways, revealing where R&D investment and regulatory incentives are most likely to shift the market composition.