To remove lichen and moss from the roof try the least toxic method for moss and lichen removal first oxygen bleach.
Moss and lichen on roof tiles.
Moss can be scraped off by hand but this must be performed with caution to avoid damaging roof tiles particularly in the case of timber or asphalt shingles before proceeding with any remedial work to remove moss or lichen we would recommend speaking to a roofing maintenance professional.
Luckily lichen take years to develop and will not return for a long time after the roof has been effectively cleaned.
Give the anti moss spray time to do its job and then use the high pressure cleaner to wash the tiles down.
Is it a problem.
You can remove moss and lichens from your roof by using vinegar as a environmentally friendly weedkiller.
When leaves and other material collect on your roof a perfect bed is formed for moss and lichens to grow.
Moss itself is a plant while lichen conisist of a fungus and a photosyntheizing plant living together.
While moss can look quite luscious lichen usually grows much thinner and closer to the surface of your roof.
Once diluted thoroughly saturate the lichen or moss covered surface.
There are over 12 000 types of moss most grown in clumps and release spores into the air.
While lichens don t damage the structure of roof tiles they can stain the surface of the roof as well as trap moisture.
To make one gallon of the solution.
And on your roof it usually looks like a green crust that grows in patches.
This will remove all the moss and lichen as well as any built up dirt.
Moss growing under roof slate and tiles can push the slate out of position allowing rainwater to seep into the roof structure.
As you did in the previous step walk backwards when you are spraying away from the wet tiles and onto the dry ones.
Roof moss and lichen are not only unsightly but can damage the roof over time.
Moisture increases the chance of mold growth which can damage the roof tiles.
After the second application allow the surface to dry for 4 to 5 hours.
Moss can grow quite quickly and it will grow in between roof tiles filling in the voids and lifting up roof tiles and slates.
A north facing roof usually has little sunlight which enables moss to buildup on the roof.
Moss on roof tiles.
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.
How to remove lichen from roof tiles and outdoor surfaces.
You can control the growth of moss on your roof by ensuring that your roof properly drains so that water does not stay on.
Most roofs will experience moss or lichen growth and small patches of growth are usually not a problem.