Building paper 420 A1F is the ideal underlay for lead sheet in construction, roofing, and renovation projects. Measuring 1m x 25m, this high-quality building paper provides a reliable barrier against moisture and chemicals, protecting your leadwork and other materials over time while allowing for thermal movement. Designed for durability and long-term performance, it is perfect for roofing, lead cladding, and general construction applications. Key Features: High-quality building paper underlay for lead sheet Dimensions: 1m × 25m Protects against moisture and chemicals Allows thermal movement in lead and roofing materials Ideal for construction, roofing, and renovation projects Durable, reliable, and long-lasting ⚠️ Safety Notice: Always use appropriate PPE when handling this product ⚠️