Typically customers don t see lichen regrowth for up to a year.
Lichen roof wash.
Regular washing of a roof surface will help to remove materials that adhere to the roof and promote algae mould and lichen growth dulux s roof care guide some factors may require you to get your roof cleaned more often.
Twenty years ago i bicycled about 500 miles along the oregon northern california coast and marveled at the number of asphalt shingle roofs carpeted with lichens and moss.
You can even extend the life of your outdoor surfaces by properly removing lichen with wet forget.
The roof growth gave character to many seaside and forest cottages.
Since pressure washing can degrade your roof s protective coating it is not a recommended method for removing lichen.
And you may need to clean the roof once in a while.
Step 1 clean up any organic matter on the roof such as twigs leaves or other debris.
Also mold growth can occur underneath your home s siding and get into the inner walls from a forced water source.
You can remove moss and lichens from your roof by using vinegar as a environmentally friendly weedkiller.
Wet forget is a safe roof cleaner that will remove lichen without any scrubbing or scraping.