The frequency of moss removal and re-dressing depends on factors such as the climate, shading, and surrounding vegetation. In general, it’s recommended to have moss removed and the roof re-dressed every few years to prevent excessive buildup and maintain the roof’s health.
ment can vary depending on factors such as exposure to weathering, temperature fluctuations and the quality of the installation. With proper maintenance and periodic inspections, lead cement can remain intact for several decades before requiring replacement or refurbishment.