What is vapour control? Every occupied building pumps moisture into its own walls — cooking, showers, breathing — as warm, humid air. If that vapour gets into the structure and hits a cold surface, it condenses: damp insulation, mould, rotting timber. A vapour control layer (VCL) is the barrier on the warm side of the construction that manages how much moisture can pass in, so the building fabric stays dry and the insulation keeps working.
Traditionally that meant plastic sheets, laps and tape — with every staple hole and torn lap a leak. Our answer is vapour control paint: Passive Purple and Airtight White are liquid-applied VCLs — sprayed, rollered or brushed into one seamless membrane that is airtight, vapour-controlling and Passivhaus certified. The coloured finish doubles as quality control: if the wall’s purple (or white), it’s sealed.
