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2. Roof cleaning - Wikipedia

   en.wikipedia.org/wiki/Roof_cleaning

   Roof cleaning is the process of removing algae, [1] mold, mildew, lichen and moss from roofs. [2] Also cleaning oxidation on metal roofs. Cleaning can extend the duration of a roof's ability to function. [2] Algae and other types of build-up often form on the north and west parts of roofs that are shaded or receive less sun, and can reduce a ...

3. Soft washing - Wikipedia

   en.wikipedia.org/wiki/Soft_washing

   Soft washing is a cleaning method using low pressure water. More recently, the term "softwashing" has been used to describe any form of spraying chemicals at buildings where solutions (typically sodium hypochlorite based softwashing chemicals) are used to remove mildew, bacteria, algae and other organic stains from roofs and other building exteriors.

4. Gloeocapsa magma - Wikipedia

   en.wikipedia.org/wiki/Gloeocapsa_magma

   This cyanobacteria causes substantial destruction to roofs causing shingle decay and loss of reflective power. Over time, Gloeocapsa magma breaks down the shingles by feeding off of the limestone granules embedded in the shingles. [citation needed] This decreases a roof's ability to reflect ultra-violet rays of light and shortens the life of ...

5. Reflective surfaces (climate engineering) - Wikipedia

   en.wikipedia.org/wiki/Reflective_surfaces...

   While it is generally not cost effective to clean a roof just for the energy savings, roof cleaning can be integrated as one component of your roof's routine maintenance program. It is therefore best to estimate energy savings based on weathered solar reflectance values rather than clean roof values." [43]

6. Chinese scientists identify super moss able to 'survive' in Mars

   www.aol.com/news/chinese-scientists-identify...

   Scientists have identified a super resilient desert moss species in China's western region of Xinjiang that could help sustain possible colonies on Mars, a study by the Chinese Academy of Sciences ...

7. Exterior cleaning - Wikipedia

   en.wikipedia.org/wiki/Exterior_cleaning

   Cleaning a skyscraper on a suspended stage. Workers scrub the outside of a skyscraper in Hong Kong. Exterior cleaning is the process of cleaning a building's exterior part including the restoration of hygiene or removal of litter and/or dirt on the outside of the building. It is not to be confused with interior cleaning, the act of cleaning ...