Code 3 lead is the thinnest gauge of lead used in commercial roofing and is suitable for light applications such as soakers at the abutment. As it is a thin gauge, Code 3 lead is easy to work with and, as with all lead flashing, the low melting point of lead means that you don't use as much fuel to melt the material. To allow for thermal movement and to prevent cracking it is important to restrict use of code 3 lead flashing to lengths of 1m or less.