MOSS

Moss is likely the simplest type of growth to recognize. It can vary in size from small patches to large, fuzzy clumps. Although moss lacks true roots, it features tiny projections that resemble roots and will create its own substrate by accumulating dirt and debris from its environment. It's generally advisable to remove moss from rooftops as soon as possible, before it has the opportunity to build up this substrate.

LICHEN

Lichen is a symbiotic partnership between algae and fungi. It usually appears as a greenish crust in patches. While moss looks more lush, lichen is thinner and clings closely to surfaces. Lichen on your roof can be unsightly, so it's wise to manage it before it fully establishes itself.

MOULD

When mold is present on your roof, it often signals underlying issues that originated within the home. Mold is one of the most harmful types of fungi that can develop on your roof, posing significant health risks. This type of fungus typically appears slimy and can be black, brown, or dark green in color, often manifesting as streaks of black or greenish hues. On the surface, it can become extremely slippery, creating a hazardous walking environment.

ALGAE

Dark, mould like stains on light colored roofs are unattractive but don't damage the roof. Common in warm, humid regions, algae thrive in shady, damp spots, particularly on cooler roof sides or under large trees. Unlike other plants, algae lack roots and leaves but need nutrients to grow.

Roof algae often start from a single spore carried by wind. If conditions are right, growth begins, aided by humidity, though rain isn’t necessary. Factors like overhanging branches, clogged gutters, standing water, porous roofing materials, and poor ventilation promote algae growth. Addressing these issues can help prevent roof problems.

MILDEW

The presence of mildew in your shower is not only unattractive but also poses health risks, and the same applies to mildew on your roof. Roofs lacking effective drainage systems are particularly susceptible to mildew, which proliferates swiftly in warm, damp environments. Typically, mildew appears as light gray, pink, or black patches.

DIRT/DEBRIS

Even a small amount of dirt or debris in the wrong spot can cause significant harm. It's crucial to keep water from pooling around the building, as this can lead to leaks, rot, or damage to the roof or interior of the home.