Roof cleaning is not an easy DIY job because it takes skill and know-how.
Never assume that you can just easily rent a power washer, climb to the roof and wash it yourself. Trying to balance on the roof is dangerous in itself now imagine having to carry a heavy and clumsy power washer while standing on a sloped and sometimes slippery surface. Falling off the roof can result in injury or worse fatality.
Older roofs are fragile and therefore can benefit from soft cleaning.
A soft wash is when surfactants of detergents are applied to your roof and are left for a period of time. This gives the chance for the cleaning agents to seep into every pore and lift away all the dirt built up even on the inside which makes it easier to scrub away without the need for a power wash. Soft wash cleaners require gentle force but work hard to remove dirt, soot, algae, and moss.
Moss and algae are not only unsightly, they can cause severe damage to your roof.
Algae, moss, mold, and mildew grow best in damp, dark places, like the spaces under your roof shingles. These contaminants will take over your roof over time if you let them.
There is hidden debris on your roof which is not visible from the ground, this means that when they do cause damage, it might also not be visible until it is too late.
They grow and spread throughout your entire roof and once they, especially molds, get inside your house they can cause health issues. Consistent roof cleaning will get of leaves, twigs, and other debris which increases the chance of them growing.
Roof power washing is not an expensive service but rather a valuable investment to maintain the good condition of your home.