Novia B2 Grade Polythene Coated Building Paper to BS 1521 is a high-quality, durable building membrane designed for use in construction projects that require effective protection against water and air ingress. This 100m x 1m roll of building paper is polythene coated for enhanced moisture resistance and conforms to BS 1521 standards, ensuring reliability and performance. Suitable for temporary weather protection, vapour checks, and as a separation layer in flooring and roofing applications, Novia B2 Grade Building Paper is a versatile solution trusted by professionals across the UK construction industry.