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The Unilin CavityTherm Full Fill Ext Corner Insulation PIR Board 1200 x 450 x 125mm is designed to deliver high thermal performance for external corners in cavity wall constructions. Manufactured from rigid PIR (polyisocyanurate) foam, this insulation board ensures continuous insulation and minimises thermal bridging, enhancing a buildings energy efficiency. Its precision-cut dimensions allow for easy installation and integration with standard CavityTherm boards, providing a seamless fit in new build projects. The foil facing on both sides further improves thermal resistance, making it suitable for use in residential and commercial developments requiring robust cavity wall insulation solutions.