All roofs are susceptible to moss growth, but moss is particularly common and damaging to tiled roofs . If left unchecked, it can lead to a number of serious long-term issues. Not only will moss make your roof look quite unsightly, it can also cause structural damage and block your home’s drainage system
Roofs are especially susceptible to the growth and can be significantly damaged by lichen. Lichen holds moisture in place against surfaces, which speeds up normal wear and tear… This can cause your roof shingles to bend, warp, and even sperate from each other over time.
Excessive weight load on a roof is one of the most common causes of sagging. Every roof will be designed to handle a certain weight and carry a certain load, if exceeded it can cause the roof to deflect. This has a dipping or sagging effect to the appearance of of the roof surface.