The A. Proctor Group’s range of construction membranes has been designed using years of research and development to provide comprehensive protection to the building envelope from both inside and outside of the structure, also addressing the requirements of heat, air, moisture management within the building element. Based on this research, a portfolio of technically advanced specialist membranes are available, suitable for Passivhaus design. A dedicated Proctor Passive division provides unique high-performance products enabling clients to achieve best practice, effective and reliable solutions to meet Passivhaus design requirements in line with building regulations and energy efficiency. The range includes innovative solutions to simplify reducing air leakage rates, allowing specifiers to adhere to the guiding principles of Passivhaus design without compromising in other areas. Wraptite, an advanced external airtight and vapour permeable self-adhered membrane is a certified passive house component as is Procheck Adapt, a high-performance variable-permeability vapour control layer for use in a variety of commercial and residential applications.