Biodeterioration in works of art robert j.
Green lichen on roof.
Some people feel its lovely silver shading adds color and charm.
When leaves and other material collect on your roof a perfect bed is formed for moss and lichens to grow.
As we said about green algae on roofs the presence of these black fungal or algal stains on the roof is an indicator that this roof area is in a shaded spot where you may want to be alert for development of moss or other roof problems but the level of damage from the black fungus or algae is probably low even less than that caused by lichens and certainly less than that caused by moss.
It s a combination of algae and fungus and usually has a light mint green color.
In moist or damp climates lichen flourishes growing on roofs and walkways and garden walls.
For more about conservation of stone artifacts such as this pictograph consult microbial communities in caves.
And on your roof it usually looks like a green crust that grows in patches.
Lichens and moss accelerate shingle deterioration by loosening shingle granules and exposing the asphalt and fiberglass base materials.
If you notice green white or gray spots on your roof moss and lichen are likely the culprits.
Lichen on terracotta roof tiles is particularly unappealing to the eye and is best handled before it has a chance to cake in and ruin the tiles.
While this is a popular approach a great deal of time and work must be put in to remove lichen this way.
They protect the base materials from sunlight and weathering.
A perfect roof would look bad because of lichens.
Moss itself is a plant while lichen conisist of a fungus and a photosyntheizing plant living together.
Also see these photos of gray green roof lichens and gray roof lichens.
One of the most commonly seen types of lichen is a single celled green alga trebouxia which is often found in temperate alpine and arctic regions worldwide.
The granules aren t just there to color the shingles.
Lichen can be a tough growth to remove due to the symbiotic relationship between the fungus and algae.
Koestler et als.
Lichen does not have roots like most other plants and it can grow without soil.
You can remove moss and lichens from your roof by using vinegar as a environmentally friendly weedkiller.
From your description you may have lichen growing on the surface of your roof.
To remove lichen and.
Ecology physiology and effects on paleolithic paintings found in art biology and conservation.
It doesn t trap as much water against the surface of the roof as moss but it can be acidic and has strands that can penetrate into the shingles.
Admired for its tenacious ability to survive lichen grows on roofs worldwide.
About five years ago i noticed a few patches of lichens growing on the north side of my roof.
While moss can look quite luscious lichen usually grows much thinner and closer to the surface of your roof.
Lichen and green moss growth on a slate roof.
