Lead chimney flashing is a critical part of roof weatherproofing, designed to seal the joint between the chimney stack and the roof surface. Without proper flashing, water can easily penetrate these vulnerable areas, causing leaks, damp, and internal structural damage. Lead is the ideal material for chimney flashing due to its flexibility, durability, and resistance to corrosion. It can be shaped precisely to fit around chimney bases, creating a tight and effective seal that directs water safely away.