Start on lowest row of shingles and work your way backwards to the upper part of the roof.
How to remove mould from roof tiles.
Spray the entire roof thoroughly.
Cleaning due to evidence of permanent asphalt shingle damage caused by high pressure powerwashing.
Next rinse the shingles thoroughly with a garden hose at low pressure.
Roof mould is.
Start from the top shingle and rinse downward to prevent water seepage.
As you did in the previous step walk backwards when you are spraying away from the wet tiles and onto the dry ones.
When mould is growing on top of your roof it is often indicative of problems that started within the home.
Continue spraying until you see runoff then let the chemicals sit for 15 20 minutes to soak in and begin attacking the mold.
While it will not produce the same results as pressure cleaning it offers a quick and convenient option for cleaning the mould off your roof.
Allow the roof to dry thoroughly.
The product needs to be diluted 1 part with 5 parts water in a garden sprayer.
More than likely it is spreading from your attic into your roof.
If they are severely molded you may want to give it a little longer.
Choose a day when there is no rain forecast.
Inspect the roof for any remaining fungus.
Give the anti moss spray time to do its job and then use the high pressure cleaner to wash the tiles down.
This will remove all the moss and lichen as well as any built up dirt.
If it is slimy or any sort of residue comes off on your hand repeat the above steps.
You must let the roof dry before a second application of mix.